Topic
Modal testing
About: Modal testing is a research topic. Over the lifetime, 4047 publications have been published within this topic receiving 64772 citations.
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TL;DR: In this article, an imperfection detecting machine which has composite-aluminium hybrid beam structure with high-modulus carbon/epoxy composites in order to enhance dynamic stiffness and damping capacity of the structure is introduced.
16 citations
TL;DR: In this paper, the PolyMAX algorithm is used along with simulation of two-way fluid-structure interactions, as a new virtual testing method for estimating the structural modal parameters and damping ratios of a vibrating structure in either air or some other fluid.
16 citations
01 Jan 1984
TL;DR: In this paper, the authors used the Galileo spacecraft as a test article for performing modal tests by various methods and evaluated the relative merits of the various modal testing methods using the results of the test article.
Abstract: Modal tests are playing an increasingly important role in structural dynamics efforts which are in need of analytical model verification or trouble shootings. In the meantime, the existing modal testing methods are undergoing great changes as well as new methods are being created. Although devoted advocates of each method can be found to argue the relative advantages and disadvantages, the general superiority, if any, of one or the other is not yet evident. The Galileo spacecraft, a realistic, complex structural system, will be used as a test article for performing modal tests by various methods. The results will be used to evaluate the relative merits of the various modal testing methods.
16 citations
01 Nov 2001
TL;DR: This test case is a controlled lab set-up enabling different parameter estimation methods techniques to be used and compared to the Operational Modal Analysis.
Abstract: Operational Modal Analysis also known as Output Only Modal Analysis has in the recent years been used for extracting modal parameters of civil engineering structures and is now becoming popular for mechanical structures. The advantage of the method is that no artificial excitation need to be applied to the structure or force signals to be measured. All the parameter estimation is based upon the response signals, thereby minimising the work ofpreparation for the test. This test case is a controlled lab set-up enabling different parameter estimation methods techniques to be used and compared to the Operational Modal Analysis. For Operational Modal Analysis two different estimation techniques are used: a non-parametric technique based on Frequency Domain Decomposition (FDD), and a parametric technique working on the raw data in time domain, a data driven Stochastic Subspace Identification (SSI) algorithm. These are compared to other methods such as traditional Modal Analysis.
16 citations
TL;DR: In this paper, a direct modal parameter identification method, based on the Dynamic Data System approach, has been proposed, which utilizes data in the form of time series to develop discrete difference equations representing the dynamic properties of the machine tool structure at the points of measurement.
16 citations