Integrated layout and topology optimization design of multi-component systems under harmonic base acceleration excitations

被引：0
作者：
Tao Liu
Ji-Hong Zhu
Wei-Hong Zhang
Hua Zhao
Jie Kong
Tong Gao
机构：
[1] Northwestern Polytechnical University,State IJR Center of Aerospace Design and Additive Manufacturing, School of Mechanical Engineering
[2] Northwestern Polytechnical University,MIIT Laboratory of Metal Additive Manufacturing and Innovative Design, NPU
[3] Northwestern Polytechnical University,QMUL Joint Research Institute
[4] Northwestern Polytechnical University,Institute of Intelligence Material and Structure, Unmanned System Technologies
来源：
Structural and Multidisciplinary Optimization | 2019年 / 59卷
关键词：
Topology optimization; Component layout optimization; Base acceleration excitation; Vibration experiment; Damping model;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The integrated optimization of component layout and structural topology is studied in this paper to improve the dynamic performance of the multi-component structure systems under harmonic base acceleration excitations. Considering linear systems, including multi-point constraints interconnecting the components and structures as an integrity, the dynamic responses and the corresponding design sensitivities are analytically derived based on the mode acceleration method. To obtain precise dynamic response, structural real damping characteristics are measured using vibration experiments, which are relevant to the structural dynamic response, especially when the excitation frequencies fall into the resonant frequency band. Further verifications are done by the comparison of Rayleigh damping, constant damping ratio, and hysteretic damping model with experimental results of structures achieved by resin-based additive manufacturing. In this way, structural real damping characteristics are taken into account in the integrated optimization. Numerical examples and vibration testing results are presented to show the validity of the optimization procedure and its potential application in engineering.
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页码：1053 / 1073
页数：20
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