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: A method is proposed in order to select the most relevant degrees of freedom which should be monitored by sensors using two criteria based on observability of mode shapes and on information shared by sensors.
87 citations
87 citations
TL;DR: In this article, an EMD-based random decrement (RD) technique is presented to identify modal parameters from monitoring vibrational data, where the nonstationary measurement data are first decomposed into a series of quasi-stationary intrinsic mode functions (IMFs) by EMD and then applied to the selected IMFs to obtain the free-decay response.
87 citations
TL;DR: In this paper, the sharing of energy by connected, randomly vibrating structures can be estimated using a statistical approach using a modal energy as the primary variable; the structures are described statistically by their modal densities, masses and loss factors Average response levels are computed in addition, response variations are calculated to establish confidence coefficients for estimates related to these average levels.
Abstract: The sharing of energy by connected, randomly vibrating structures can be estimated, using a statistical approach Modal energy is taken as the primary variable; the structures are described statistically by their modal densities, masses, and loss factors Average response levels are computed In addition, response variations are calculated to establish confidence coefficients for estimates related to these average levels The method is applied to two cases: a single resonator attached to a plate and two plates attached together Experimental studies are reported that support the methods
87 citations
TL;DR: In this article, a robust and efficient numerical algorithm is presented, which solves the coupled modal equations by iteration, and it is shown that the numerical integration algorithm always converges for proportional damping and for loading that varies linearly within an arbitrary time interval.
86 citations