scispace - formally typeset
Search or ask a question

Showing papers on "Dynamic Vibration Absorber published in 2006"


Journal ArticleDOI
TL;DR: In this paper, an adaptive tuned vibration absorber (ATVA) based on the unique characteristics of magnetorheological elastomers (MREs), whose modulus can be controlled by an applied magnetic field.
Abstract: In this technical note we develop an adaptive tuned vibration absorber (ATVA) based on the unique characteristics of magnetorheological elastomers (MREs), whose modulus can be controlled by an applied magnetic field. The MRE used in the developed ATVA was prepared by curing a mixture of 704 silicon rubber, carbonyl iron particles and a small amount of silicone oil under a magnetic field. The ATVA works in shear mode and consists of an oscillator, smart spring elements with MREs, a magnet conductor and two coils. Natural frequencies of the ATVA under different magnetic fields were both theoretically analyzed and experimentally evaluated by employing a beam structure with two ends supported. The experimental results demonstrated that the natural frequency of the ATVA can be tuned from 55 to 82 Hz. The relative frequency change is as high as 147%. Furthermore, the absorption capacity of the developed ATVA can achieve as high as 60 dB, which was also experimentally justified.

346 citations


Journal ArticleDOI
TL;DR: In this paper, a two-DOF absorber with a negative damper in one of its two connections to the primary system was proposed to suppress single-mode vibration of a primary system.
Abstract: Whenever a tuned-mass damper is attached to a primary system, motion of the absorber body in more than one degree of freedom (DOF) relative to the primary system can be used to attenuate vibration of the primary system. In this paper, we propose that more than one mode of vibration of an absorber body relative to a primary system be tuned to suppress single-mode vibration of a primary system. We cast the problem of optimization of the multi-degree-of-freedom connection between the absorber body and primary structure as a decentralized control problem and develop optimization algorithms based on the H2 and H-infinity norms to minimize the response to random and harmonic excitations, respectively. We find that a two-DOF absorber can attain better performance than the optimal SDOF absorber, even for the case where the rotary inertia of the absorber tends to zero. With properly chosen connection locations, the two-DOF absorber achieves better vibration suppression than two separate absorbers of optimized mass distribution. A two-DOF absorber with a negative damper in one of its two connections to the primary system yields significantly better performance than absorbers with only positive dampers.

102 citations


PatentDOI
TL;DR: In this article, an elastic layer of thermal or insulation material in which a plurality of discrete masses are distributed throughout is installed as a pre-formed layer, or be blown into position within a structure where vibration or acoustic sound control is required.
Abstract: Vibration or acoustic sound control is achieved using an elastic layer of thermal or insulation material in which a plurality of discrete masses are distributed throughout. The elastic layer may be installed as a pre-formed layer, or be blown into position within a structure where vibration or acoustic sound control is required.

79 citations


Journal ArticleDOI
TL;DR: In this paper, a sealed liquid column damper (TLCD) is used to counteract steady-state vibrations in a base-isolated building with a TLCD in the basement.
Abstract: Sealed liquid column damper (TLCD) are tuned in the low-frequency range of application (say below 5 Hz) with respect to a selected natural frequency of the main structure by means of a geometrical transformation in analogy to the classical tuned mass damper (TMD). To improve the performance in MDOF buildings even further, the influence of neighboring modes is taken into account by fine-tuning in state space, rendering the optimal parameters modified. Final adjustments are easily made in the course of in situ testing. The passive sealed TLCD making use of the gas-spring effect and, since turbulent damping of assigned strength is present, is perfectly suited to counteract steady-state vibrations. Reduction of transient vibration peaks, observed within the initial period of the strong motion phase of earthquakes, requires active control, realized by controlled pressure input into the gas volume. The TLCD is commonly sufficiently damped and the vertical component of the seismic excitation does not cause parametric resonance. A sufficient condition based on the cut-off damping must be checked. Computer simulations and small scale experimental testing under time-harmonic-, single seismogram- and random- forcing confirmed the excellent performance and robustness of the TLCD. Optimal solutions for benchmark MDOF structures with multiple TLCD are presented when excited either by wind gusts or by earthquakes. A base-isolated structure is considered with the effective damping supplied by a TLCD in the basement. Copyright © 2005 John Wiley & Sons, Ltd.

78 citations


Journal ArticleDOI
TL;DR: In this article, a tuned mass damper with a nonlinear power law viscous damper excited by white noise is considered and the system is analyzed by statistical linearization and stochastic simulation with the objective of minimizing the standard deviation of the response.
Abstract: A tuned mass damper with a nonlinear power law viscous damper excited by white noise is considered. The system is analyzed by statistical linearization and stochastic simulation with the objective of minimizing the standard deviation of the response. It is shown that the optimal parameters for the tuned mass damper are unaffected by the magnitude of the structural damping in the linear case. However, in the nonlinear case the structural damping influences the equivalent parameters obtained by statistical linearization and thereby indirectly the optimal values for the damper parameters. Results from stochastic simulation show good agreement with results from statistical linearization in terms of the standard deviation of the response. It is shown that the optimal damping, which can be obtained by the passive device, is the same for the linear and nonlinear damper. However, for the nonlinear tuned mass damper the optimal parameters will depend on both structural damping and excitation intensity (or vibration amplitude). The results are presented in such a way that they can be used directly for the design of a tuned mass damper with damping governed by a nonlinear viscous power law.

75 citations


Journal ArticleDOI
TL;DR: Adaptive tuned vibration absorbers (ATVAs) as discussed by the authors have been used for vibration control purposes in many sectors of engineering from aerospace, to automotive to civil, for the past 100 years or so.
Abstract: The vibration absorber has been used for vibration control purposes in many sectors of engineering from aerospace, to automotive to civil, for the past 100 years or so. A limitation of the device, however, is that it acts like a notch filter, only being effective over a narrow band of frequencies. Recent developments have overcome this limitation by making it possible to tune the device over a range of frequencies. This has been achieved by incorporating a variable stiffness element that can be adjusted in real-time. In this paper, some ways in which stiffness change can be achieved in practice are reviewed and some examples of prototype adaptive tuned vibration absorbers (ATVAs) are described. A simple control scheme to automatically tune an ATVA is also presented.

67 citations


Journal ArticleDOI
Jie Liu1, Kefu Liu1
TL;DR: In this paper, an electromagnetic vibration absorber (EMVA) whose stiffness is on-line tunable is presented, which is capable of suppressing vibration of the primary system excited by a harmonic force with a variable frequency.

60 citations


Journal ArticleDOI
TL;DR: In this article, a resonant fuzzy logic controller (FLC) was proposed to minimize structural vibration using collocated piezoelectric actuator/sensor pairs, which increases the damping of the structures to minimize certain resonant responses.

56 citations


Journal ArticleDOI
TL;DR: In this paper, an analytical and experimental investigation of the dynamic response and performance of a special type of centrifugal pendulum vibration absorber used for reducing torsional vibrations in rotating systems is described.
Abstract: This paper describes an analytical and experimental investigation of the dynamic response and performance of a special type of centrifugal pendulum vibration absorber used for reducing torsional vibrations in rotating systems. This absorber has the property that it behaves linearly out to large amplitudes, and thus experiences no frequency de-tuning. Previous analytical work on such tautochronic absorbers has considered the response, dynamic stability, and performance of single- and multi-absorber systems. In particular, it is known that these absorbers, when perfectly tuned to the order of the applied torque, do not exhibit hysteretic jumps in the response, but multi-absorber systems can experience instabilities that destroy the symmetry of their synchronous response. In this work we extend the theory to include linear de-tuning of the absorbers, which can be used as a design parameter to influence absorber performance, both in terms of rotor vibration reduction and operating range. This paper reviews the basic analysis, which employs scaling and averaging, and extends it to include the detuning. In addition, systematic experiments of systems with one and two absorbers are carried out. The experimental results are unique in that the test facility is capable of varying the excitation order, thereby allowing one to obtain order-response curves that are useful for design purposes. The experimental results are found to be in excellent agreement with the analytical predictions, and these clearly demonstrate the tradeoffs faced when selecting absorber tuning.

45 citations


Journal ArticleDOI
TL;DR: In this article, a tuned absorber is added to an externally excited pendulum, which is simulated by a second order non-linear differential equation having both quadratic and cubic non-linearties, subjected to harmonic excitation.
Abstract: Vibrations and dynamic chaos should be controlled in structures and machines The most famous method of vibration control is using absorbers or tuned dampers or neutralizers The main aim is to improve the system behavior at different resonance conditions Two main strategies are used They are passive and active control methods In this paper, a tuned absorber, in the transversally direction, is added to an externally excited pendulum, which is simulated by a second order non-linear differential equation having both quadratic and cubic non-linearties, subjected to harmonic excitation The absorber is usually designed to control one frequency at primary resonance where system damage is probable The quenching efficiency of the system is studied Active control is applied to the system via negative velocity feedback or its square or cubic value The multiple time scale perturbation technique is applied throughout An approximate solution is derived up to the second order approximation The stability of the system is investigated applying both frequency response equations and phase plane methods The effects of the absorber on system behavior are studied numerically Optimum working conditions of the system are extracted when applying both passive and active control methods

43 citations


Patent
22 Nov 2006
TL;DR: In this article, a portable computer and a shock absorber assembly thereof are used to reduce the vibration of the hard disc drive. But the authors do not consider the use of a damper.
Abstract: A portable computer and a shock absorber assembly thereof. The portable computer includes a body, a hard disc drive, a supporting member, an isolator, a vibration absorber, and a damper. The hard disc drive is disposed in the body. The supporting member is disposed on the hard disc drive. The isolator is disposed on the supporting member. The vibration absorber is disposed on the hard disc drive. The damper is disposed on the vibration absorber. Thus, the hard disc drive is connected to the body via the isolator, and connected to the vibration absorber via the damper. As a result, the vibration of the hard disc drive can be reduced.

Journal ArticleDOI
TL;DR: In this paper, a new kind of shock absorber with Coulomb-fluid damping through coupling oil, wire gauze, rubber and spring by ingenious tactics is designed for reinforcement of electronic-information equipment in atrocious vibration and impact.

Journal ArticleDOI
TL;DR: In this article, a modified absorber with inertia effect of the spring mass considered is presented and the forced vibration analyses of a single degree-of-freedom (dof) and a multiple dof structural systems are performed.

Journal ArticleDOI
TL;DR: In this paper, a non-linear elastomeric damper or absorber is used to control the torsional vibrations of the crankshaft in internal combustion engines, when subjected to both external and parametric excitation torques.
Abstract: Vibration of a mechanical system is often an undesirable phenomenon, as it may cause damage, disturbance, discomfort and, sometimes, destruction of systems and structures. To reduce vibration, many methods can be used. The most famous method is using dynamic absorbers or dampers. In the present work, a non-linear elastomeric damper or absorber is used to control the torsional vibrations of the crankshaft in internal combustion engines, when subjected to both external and parametric excitation torques. The multiple time scale perturbation method is applied to determine the equations governing the modulation of both amplitudes and phases of the crankshaft and the absorber. These equations are used to determine the steady-state amplitudes and system stability. Numerical integration of the basic equations is applied to investigate the effects of the different parameters on system behavior. A comparison is made with the available published work. Some recommendations are given at the end of the work.

Proceedings ArticleDOI
01 Jan 2006
TL;DR: In this paper, the feasibility and effectiveness of a self-powered magnetorheological (MR) damper operated by the energy harvested from vibration and shock environment was investigated, and an energy-harvesting device consisting of a stator, a permanent magnet and a spring was added to an MR damper.
Abstract: This paper addresses the feasibility and effectiveness of a self-powered magnetorheological (MR) damper operated by the energy harvested from vibration and shock environment. For doing so, an energy-harvesting device is theoretically constructed and added to an MR damper. This energy-harvesting device consists of a stator, a permanent magnet and a spring, and works as an energy-harvesting dynamic vibration absorber (DVA). The dynamic equation for the self-powered MR damper is derived theoretically. In order to theoretically evaluate the vibration isolation capability of the self-powered MR damper, a single-degree-of-freedom engine mounting system using the MR damper is constructed. The governing equation of motion for the engine mounting system is theoretically derived. A parametric study is conducted to find the optimal stiffness of the energy-harvesting DVA for the engine mounting system. Under various excitation displacements and a shock load, the vibration isolation performance of the engine mounting system with the self-powered MR damper is theoretically evaluated in frequency and time domains.Copyright © 2006 by ASME

Journal ArticleDOI
TL;DR: In this paper, a semi-active tuned vibration absorber (TVA) subject to structural mass off-tuning is evaluated. And the experimental results show that the semi active TVA outperforms the passive TVA in reducing maximum vibrations.
Abstract: This paper offers an experimental robustness analysis of a semi-active tuned vibration absorber (TVA) subject to structural mass off-tuning, which occurs frequently in practical applications of TVAs. One of the critical problems of a conventional TVA is off-tuning or miss-tuning because off-tuned TVAs may amplify the vibrations of the primary structure. This study intends to evaluate how well semi-active TVAs are able to adapt to structural mass changes (mass off-tuning) as compared with passive TVAs. To this end, a test apparatus was built to represent a two-degree-of-freedom structure model coupled with a TVA. The semi-active TVA considered in this study employed a magneto-rheological (MR) damper as its damping element to enhance overall performance. Using this test apparatus, a series of tests were conducted to identify the optimal tuning parameters of the TVAs. After obtaining each TVA 's optimal tuning parameters based on equal peak transmissibility criteria, the mass off-tuning tests were then performed on the optimally tuned TVAs. In order to off-tune the system, the mass of the primary structure varied from -19% to +19% of its nominal mass using a set of steel plates. Overall, the experimental results show that the semi-active MR TVA outper-forms the passive TVA in reducing maximum vibrations. Moreover, the results show that the semi- active TVA is more robust to changes in the primary mass (mass off-tuning) The results further show that the semi-active MR TVA offers larger performance gains as the structure mass increases.

Journal ArticleDOI
TL;DR: The principle, called Separating Theorem, holds for pole-placement by state-PD, state-PI and state-PID feedback and is successfully applied to the control of a robot vibration absorber.
Abstract: The pole-placement problem of linear systems by state-PID feedback is investigated. A general and efficient pole-placement solution for linear time-invariant systems with state-PID feedback is derived using the traditional procedures of full state feedback. The principle, called Separating Theorem, holds for pole-placement by state-PD, state-PI and state-PID feedback and is successfully applied to the control of a robot vibration absorber. These results open a new area for the design and tuning of state-PID feedback types of controller.

Journal ArticleDOI
TL;DR: In this paper, an energy-recycling semi-active method was applied to suppress the vibration of a beam that is a typical continuous structure and a membrane that is typical tension-stabilized structure.

Journal ArticleDOI
TL;DR: In this paper, a nonlinear two-degree-of-freedom system with linear oscillators and a vibro-impact oscillator was considered, where the linear oscillator is an approximation of some continuous elastic system, and the vibro impact oscillator acts as an absorber of the linear system vibrations.
Abstract: The nonlinear two-degree-of-freedom system under consideration consists of the linear oscillator with a relatively big mass, which is an approximation of some continuous elastic system, and of the vibro-impact oscillator with a relatively small mass, which is an absorber of the linear system vibrations. Analysis of nonlinear normal vibration modes shows that a stable localized vibration mode, which provides the vibration regime appropriate for the elastic vibration absorption, exists in a large region of the system parameters. In this regime, amplitudes of vibrations of the linear system are small, simultaneously vibrations of the absorber are significant.

Book ChapterDOI
01 Jan 2006
TL;DR: In this article, a dynamic absorber in the knob is shown to effectively reduce the vibration of the second bending mode and minimize the painful sensation of sting in the top hand of a player holding a baseball or Softball bat.
Abstract: The painful sensation of sting in the top hand of a player holding a baseball or Softball bat may be a deterrent to enjoying the game, especially for young players. Several mechanisms for reducing the vibration of bending modes have been implemented in youth baseball bats in order to reduce sting. One method of assessing the effectiveness of these mechanisms is to compare the damping rate they provide for the first two or three bending modes in a bat. Damping rates are compared for several wood, aluminum, composite, and two-piece construction baseball bats, in addition to several bats with special damping control mechanisms. Experimental evidence suggests that damping mechanisms which reduce the vibration of the second bending mode arc preferred by players. A novel dynamic absorber in the knob is shown to effectively reduce the vibration of the second bending mode and minimize the painful sting felt in the top hand.

Patent
29 Nov 2006
TL;DR: In this article, the utility model of a magnetically rheologic elastic body frequency shift vibration absorber is described, which is characterized by an executing component, a control component, and a sensor.
Abstract: The utility model relates to a magnetically rheologic elastic body frequency shift vibration absorber which comprises an executing component, a control component and a sensor The utility model is characterized in that the executing component is composed of a magnetism conducting piece, a coil, magnetically rheologic elastic bodies, a vibration absorbing quality block and a base, wherein the magnetism conducting piece is composed of an inner sleeve barrel and an outer sleeve barrel or a U-shaped iron core and an armature iron or an upper plate, a lower plate and a columnar iron core, and the magnetically rheologic elastic bodies are filled between the inner sleeve barrel and the outer sleeve barrel, or between the U-shaped iron core and the armature iron or between the upper plate and the lower plate; corresponding voltage of the coil is regulated so as to regulate the rigidity and the elasticity of the magnetically rheologic elastic bodies so that the vibration frequency of the magnetically rheologic elastic bodies are changed until the vibration frequency of the executing component of the vibration absorber is the same with the vibration frequency of a vibration damping object The utility model has the advantages of good vibration absorption effect, large bandwidth of vibration damping frequency, small quality and volume, simple structure and easy control method, and the utility model can combine and use a plurality of vibration absorbers according to the vibration damping requirements of different frequency bands

Patent
09 Aug 2006
TL;DR: In this paper, a multifunction vibroshock and quarter suspension simulated condition testing table is presented, which is capable of realizing simulated condition test to common sausage type oil pressure vibration absorber.
Abstract: Present invention relates to a multifunction vibroshock and quarter suspension simulated condition testing table. It contains mechanical jack horse part, hydraulic pressure part and computer control system computer control system part. Said invention possess variety function, capable of realizing simulated condition test to common sausage type oil pressure vibration absorber, magnetic fluid deformation vibration absorber, common passive quarter suspension and magnetic fluid deformation semiactive suspension. Said invention can analyse single vibration absorber, suspension whole performance, and verifying magnetic fluid deformation semiactive suspension control effect in different control strategy.

Journal ArticleDOI
TL;DR: In this paper, an electromagnetic damper is developed to construct a tunable damped dynamie vibration absorber, which can suppress vibration of a structure subjected to a harmonic force with variable frequency.
Abstract: An electromagnetic damper is developed to construct a tunable damped dynamie vibration absorber. The developed vibration absorber can suppress vibration of a structure subjected to a harmonic force with variable frequency. The damping of the vibration absorber can be adjusted on-li ne to cope with variation in the exciting frequency. The electromagnetie damper is composed of an electromagnet and a copper plate attached to the absorber mass. The relationship between the damping ratio and the damper current is discussed analytieally. An experiment is conducted to determine the damping coefficients. A c1amped-c1amped beam is used as a primary system. The damper is connected between the absorber mass and the ground. This setup is referred to as skyhook dynamic vibration absorber in this study. The performance of a skyhook dynamic vibration absorber is compared with that of a groundhook dynamic vibration absorber where a damper is connected between the primary mass and the absorber mass. Two algorithms are proposed to tune the damper on-line. The first algorithm is FFT-based while the second one is rms-based. The control algorithms are tested against three frequency varying scenarios: multi-step change, Iinear change, and single-step change plus impact disturbance. Merits of each of the control algorithms are demonstrated.

Patent
21 Jun 2006
TL;DR: In this article, a tool for mounting car vibration absorber springs is described, where the upper part of a framework is fixedly and horizontally provided with a nut; the inner side of the nut is provided with leading screw; the upper end of the leading screw is an operating handle, and the lower end of a screw is a spring pressure head.
Abstract: The utility model discloses a special tool for mounting car vibration absorber springs, wherein the upper part of a framework is fixedly and horizontally provided with a nut; the inner side of the nut is provided with a leading screw; the upper end of the leading screw is an operating handle, and the lower end of the leading screw is a spring pressure head; the lower part of the framework is provided with a base; the upper side of the base is fixedly provided with a clamp; the clamp can be two semicircle clamping loops; one ends of the clamping loops are connected, and the other ends of the clamping loops are provided with bolt holes and threaded bolts. The utility model has the advantages of time saving and labor saving time saving and labor saving for mounting car vibration absorber springs, and can not damage other components.

Journal ArticleDOI
TL;DR: In this paper, the effect of dry friction on the response of a system that implements a vibration absorber is discussed, which is basically a plant with a PMDC motor excited by a harmonic forcing term and coupled with a quadratic nonlinear controller.
Abstract: Application of saturation to provide active nonlinear vibration control was introduced not long ago. Saturation occurs when two natural frequencies of a system with quadratic nonlinearities are in a ratio of around 2:1 and the system is excited at a frequency near its higher natural frequency. Under these conditions, there is a small upper limit for the high-frequency response and the rest of the input energy is channeled to the low-frequency mode. In this way, the vibration of one of the degrees of freedom of a coupled 2 degrees of freedom system is attenuated. In the present paper, the effect of dry friction on the response of a system that implements this vibration absorber is discussed. The system is basically a plant with a permanent magnet DC (PMDC) motor excited by a harmonic forcing term and coupled with a quadratic nonlinear controller. The absorber is built in electric circuitry and takes advantage of the saturation phenomenon. The method of multiple scales is used to find approximate solutions. Various response regimes of the closed-loop system as well as the stability of these regimes are studied and the stability boundaries are obtained. Especial attention is paid on the effect of dry friction on the stability boundaries. It is shown that while dry friction tends to shrink the stable region in some parts, it enlarges other parts of the stable region. To verify the theoretical results, they have been compared with numerical solution and good agreement between the two is observed.

Proceedings ArticleDOI
14 Jun 2006
TL;DR: In this paper, the authors present techniques for the reduction of vibration in high-rise elevator passenger cabs, which improves ride comfort and enables the use of more aggressive motion profiles to shorten travel times.
Abstract: This paper presents techniques for the reduction of vibration in high-rise elevator passenger cabs. Reduction in cab vibration improves ride comfort and enables the use of more aggressive motion profiles to shorten travel times. Vibration reduction is accomplished by input shapers in a scheduling algorithm based on elevator position. To deal with transient disturbances, a vibration absorber is used to complement the input-shaping control scheme.

Journal ArticleDOI
TL;DR: In this paper, a dynamic absorber was designed to reduce optical disk drive vibration at multiple rotating speeds using an enlarged bandwidth control at targeted rotating speeds, which leads to far greater stability and robustness.
Abstract: In this study, we design a dynamic absorber to reduce optical disk drive vibration at multiple rotating speeds using an enlarged bandwidth control at targeted rotating speeds. In addition to the basic absorber as a passive device, a voice coil motor serves to actively control vibration. Combining passive and active devices leads to far greater stability and robustness. The proposed dynamic absorber has been validated in simulations and experiments.

Patent
05 Sep 2006
TL;DR: In this paper, a tuned mass damper system and vibration damper method for a hybrid electric road vehicle is described, which has a powertrain with an engine, at least one electric machine and a battery.
Abstract: A tuned mass damper system and vibration damper method for a hybrid electric road vehicle is disclosed. The vehicle has a powertrain with an engine, at least one electric machine and a battery. The battery mass forms a part of a vehicle vibration absorber that attenuates vibrations induced by road wheels of the vehicle.

01 Jan 2006
TL;DR: Adaptive tuned vibration absorbers (ATVAs) as discussed by the authors have been used for vibration control purposes in many sectors of engineering from aerospace, to automotive to civil, for the past 100 years or so.
Abstract: The vibration absorber has been used for vibration control purposes in many sectors of engineering from aerospace, to automotive to civil, for the past 100 years or so. A limitation of the device, however, is that it acts like a notch filter, only being effective over a narrow band of frequencies. Recent developments have overcome this limitation by making it possible to tune the device over a range of frequencies. This has been achieved by incorporating a variable stiffness element that can be adjusted in real-time. In this paper, some ways in which stiffness change can be achieved in practice are reviewed and some examples of prototype adaptive tuned vibration absorbers (ATVAs) are described. A simple control scheme to automatically tune an ATVA is also presented.

Journal ArticleDOI
TL;DR: In this paper, the authors compared the absorption properties of simple and compound impact vibration absorbers in case of transient and forced vibration and determined the effect of system parameters on the absorption efficiency.
Abstract: This experimental research deals with passive vibration control of a primary mass using an impact vibration absorber (IVA). This paper is on two types of IVAs, namely, a simple IVA and a compound IVA, which have different attachment configurations for the impacting mass. The main contribution of this work was to experimentally analyze the effect of attachment configuration on IVAs. Thus, the primary objective of this research was to compare the absorption characteristics of simple and compound IVAs in case of transient and forced vibration. The secondary objective was to determine the effect of system parameters on the absorption efficiency of a compound IVA for both transient and forced vibration. It was shown that, for forced vibrations, the simple IVA (compared to the compound IVA) has more pronounced inefficient absorption region. On the other hand, the compound IVA hardly has a clear inefficient absorption region. In the respective absorption region, it is noted that the simple IVA has a more prominent vibration absorption level. Practical applications of the results are also discussed.