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Nonlinear dynamics analysis of joint dominated space deployable truss structures

ISSN号：1005-9113
期刊名称：哈尔滨工业大学学报(英文版)
时间：2013
页码：68-74
分类：V414.1[航空宇航科学与技术—航空宇航推进理论与工程;航空宇航科学技术]
作者机构：[1]School of Mechatronics Engineering, Harbin Institute of Technology, Harbin150001, China, [2]School of Astronautics, Harbin Institute of Technology, Harbin 150001, China
相关基金：Sponsored by the National Natural Science Foundation of China（Grant No.50935002 and 11002039）; Key Laboratory Opening Funding of Aerospace Mechanism and Control Technology（Grant No.HIT.KLOF.2009062）; ＂111 Project＂（Grant No.B07018）
相关项目：空间新型大尺度可折展式机构创新设计理论与方法研究

中文摘要：

Joints are necessary components in the larger space deployable truss structures which have significant effect on the dynamics behavior of these deployable joint-dominated structures. Four kinds of joints’ nonlinear force-displacement relationship are analyzed based on describing function method. The dynamic responses of one-DOF jointed system under different exciting force levels are investigated to understand the influence of joint nonlinearity on dynamic responses. The influences of joint characterizing parameters on joint nonlinearities are analyzed. Dynamic responses of the modular beam-like deployable joint-dominated truss structure are tested under different sinusoidal exciting force levels. The experimental results show obvious nonlinear behaviors contributed by joints that dynamic response shifts to lower resonance frequency and higher amplitude with the increase of exciting force. The nonlinearity of the joints in the tested structure is compared with the theoretical results and identified to meet with the hysteresis nonlinearity.

英文摘要：

Joints are necessary components in the larger space deployable truss structures which have significant effect on the dynamics behavior of these deployable joint-dominated structures. Four kinds of joints＇ nonlinear force-displacement relationship are analyzed based on describing function method. The dynamic responses of one-DOF jointed system under different exciting force levels are investigated to understand the influence of joint nonlinearity on dynamic responses. The influences of joint characterizing parameters on joint nonlinearities are analyzed. Dynamic responses of the modular beam-like deployable joint-dominated truss structure are tested under different sinusoidal exciting force levels. The experimental results show obvious nonlinear behaviors contributed by joints that dynamic response shifts to lower resonance frequency and higher amplitude with the increase of exciting force. The nonlinearity of the joints in the tested structure is compared with the theoretical results and identified to meet with the hysteresis nonlinearity.

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