Author
Guoping Chen
Bio: Guoping Chen is an academic researcher from Nanjing University of Aeronautics and Astronautics. The author has contributed to research in topics: Vibration & Finite element method. The author has an hindex of 10, co-authored 45 publications receiving 388 citations.
Papers
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TL;DR: In this article, a numerically comparative study on dynamic response of a planar slider-crank mechanism with two clearance joints between considering harmonic drive and link flexibility is conducted, and the effect of harmonic drive on dynamic behavior of the mechanism with different location of single clearance joint and with two clearances respectively.
108 citations
TL;DR: In this article, a new rotor-ball-bearing-casing coupling dynamic model for a practical aero-engine is established, where the rotor and casing systems are modelled using the finite element method, support systems are modeled as lumped parameter models, nonlinear factors of ball bearings and faults are included, and four types of supports and connection models are defined.
62 citations
TL;DR: In this article, an improved aero-engine blade-casing rubbing model is introduced, in which, the effects of the number of blades and changes in the rotor-stator clearance on rubbing forces are considered, the improved rubbing model can simulate rubbing faults for various rubbing conditions, including single point, multi-point, local part, and complete-cycle rubbing on the casing and rotor.
48 citations
TL;DR: In this article, the effects of material uncertainty on dynamic responses of the structure are studied by using Monte Carlo simulation, and an improved inverse analysis technique based on the finite element method and mode superposition method is taken for impact force identification.
27 citations
TL;DR: In this article, a rotor-support-casing whole model for certain type turbofan aeroengine is established, and the rotor and casing systems were modeled by means of the finite element beam method; the support systems are modeled by lumped-mass model; support looseness fault model is also introduced.
Abstract: Support looseness fault is a type of common fault in aeroengine. Serious looseness fault would emerge under larger unbalanced force, which would cause excessive vibration and even lead to rubbing fault, so it is important to analyze and recognize looseness fault effectively. In this paper, based on certain type turbofan engine structural features, a rotor-support-casing whole model for certain type turbofan aeroengine is established. The rotor and casing systems are modeled by means of the finite element beam method; the support systems are modeled by lumped-mass model; the support looseness fault model is also introduced. The coupled system response is obtained by numerical integral method. In this paper, based on the casing acceleration signals, the impact characteristics of symmetrical stiffness and asymmetric stiffness models are analyzed, finding that the looseness fault would lead to the longitudinal asymmetrical characteristics of acceleration time domain wave and the multiple frequency characteristics, which is consistent with the real trial running vibration signals. Asymmetric stiffness looseness model is verified to be fit for aeroengine looseness fault model.
26 citations
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30 Sep 1986
TL;DR: In this paper, the authors used the canonical M, K form of the undamped motion equations to model viscoelastic damping and used finite element analysis to model the damping factors.
Abstract: Mathematical models of elastic structures have become very sophisticated: given the crucial material properties (mass density and the several elastic moduli), computer-based techniques can be used to construct exotic finite element models. By contrast, the modeling of damping is usually very primitive, often consisting of no more than mere guesses at “modal damping factors.” The aim of this paper is to raise the modeling of viscoelastic structures to a level consistent with the modeling of elastic structures. Appropriate material properties are identified which permit the standard finite element formulations used for undamped structures to be extended to viscoelastic structures. Through the use of “dissipation” coordinates, the canonical “M , K ” form of the undamped motion equations is expanded to encompass viscoelastic damping. With this formulation finite element analysis can be used to model viscoelastic damping accurately.
339 citations
TL;DR: A comprehensive survey of the literature of the most relevant analytical, numerical, and experimental approaches for the kinematic and dynamic analyses of multibody mechanical systems with clearance joints is presented in this review.
271 citations
TL;DR: In this paper, the authors reviewed and critically discussed the current progress of mechanical model development of RBR systems, and identified future trends for research, and summarized five kinds of rolling bearing models, namely, the lumped-parameter model, the quasi-static model, quasi-dynamic model, dynamic model, and the finite element (FE) model.
203 citations
TL;DR: The progress in the area of vibration-based damage identification methods over the past 10 years is reviewed to help researchers and practitioners in implementing existing damage detection algorithms effectively and developing more reliable and practical methods for civil engineering structures in the future.
200 citations
TL;DR: In this article, a numerically comparative study on dynamic response of a planar slider-crank mechanism with two clearance joints between considering harmonic drive and link flexibility is conducted, and the effect of harmonic drive on dynamic behavior of the mechanism with different location of single clearance joint and with two clearances respectively.
108 citations