Frequency domain structural synthesis for quasi-static crack propagation: Global–local analysis

Gordis, Joshua H.; Kwon, Young W.

doi:10.1016/j.compstruc.2011.02.005

Cited by 1 publication

(1 citation statement)

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“…The basic idea of DSM involves decomposing an assembly system into several components and predicting the dynamic properties of the assembly structure from its components. The DSM is divided into two groups, namely, one in which modal data is used and another in which FRF is used directly [22,23]. The FRF-using DSM is selected in this study.…”

Section: Introductionmentioning

confidence: 99%

Research on Microvibrations Generated by a Control Moment Gyroscope on a Flexible Interface Based on a Dynamic Substructure Method

Cheng

2018

International Journal of Aerospace Engineering

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Microvibrations generated by a control moment gyroscope (CMG) will couple with a flexible spacecraft structure, and this seriously degrades certain point performances of a spacecraft. This study focuses on investigating the coupled microvibrations caused by a CMG on a flexible interface by using a dynamic substructure method (DSM). First, a DSM based on a frequency response function (FRF) is established, and this method is used to simultaneously synthesize multiple substructures with different coordinates irrespective of whether their connection interfaces are rigid or flexible. Second, the bearings and the gimbal servo system are simplified into linear springs, and therefore the CMG model is equivalent to a mass-spring-damping system with eighteen degrees of freedom (DOFs). Third, the established DSM is employed to deduce the FRF matrix of the CMG-flexible interface coupling system that consists of CMG mounted on an aluminum honeycomb sandwich palate (AHSP). Dynamic responses of the coupling system are calculated by the derived FRF matrix. Finally, MATLAB and multibody dynamics simulations are conducted to analyze and validate the dynamic responses of the coupling system obtained by the DSM. The results indicate that the DSM is appropriate to predict the coupled microvibrations of CMG on a flexible interface and exhibits high prediction accuracy and computational efficiency.

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Section: Introductionmentioning

confidence: 99%

Research on Microvibrations Generated by a Control Moment Gyroscope on a Flexible Interface Based on a Dynamic Substructure Method

Cheng

2018

International Journal of Aerospace Engineering

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show abstract

Frequency domain structural synthesis for quasi-static crack propagation: Global–local analysis

Cited by 1 publication

References 21 publications

Research on Microvibrations Generated by a Control Moment Gyroscope on a Flexible Interface Based on a Dynamic Substructure Method

Research on Microvibrations Generated by a Control Moment Gyroscope on a Flexible Interface Based on a Dynamic Substructure Method

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