多环闭链空间可展开机构力-热耦合协同优化

doi:10.3969/j.issn.1001-2400.2018.01.008

Abstract

Abstract:

In order to address the thermo-mechanical coupling design of a multi-closed-loop space deployable mechanism, the static equilibrium equation is derived and a static analysis is made. The rotational stiffness of the mechanism in the deployed phase is obtained according to the principle of virtual work. Then, for improving the mechanical and thermal properties, the mathematical model of collaborative optimization considering thermo-mechanical coupling is established, of which the design variables are the size of bar cross section, and the objective functions include the minimal thermal deformation of the structure during the entire deployment in the space environment, the minimum weight, the maximum basic frequency and rotational stiffness in the deployed phase. By the numerical solution of the collaborative optimization model of the multi-closed-loop space deployable mechanism, the optimum rod section parameters of the deployable mechanism can be obtained. Simulation results show that the thermal deformation reduces by 56％, that the basic frequency increases by 39％, and that the mass and rotational stiffness also meet their design goals.

Key words: space deployable mechanisms, thermo-mechanical coupling, mathematical modeling, multi-closed-loop, collaborative optimization, optimum design

LI Tuanjie;ZHOU Bo;WANG Peng. Collaborative optimization based on thermo-mechanical coupling of the multi-closed-loop space deployable mechanism[J].Journal of Xidian University, 2018, 45(1): 42-47.

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Collaborative optimization based on thermo-mechanical coupling of the multi-closed-loop space deployable mechanism

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