Equivalent Beam Model and Improved Structure Design of Large Space Antenna Truss with Geometric Nonlinearity

IF 1.9 4区 工程技术 Q3 ENGINEERING, MECHANICAL Journal of Computational and Nonlinear Dynamics Pub Date : 2023-03-06 DOI:10.1115/1.4057043
Jiang Shi, Cai Guo-Ping
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引用次数: 1

Abstract

This paper proposes a extend linear equivalent method that can extend the linear equivalent micropolar beam model to the nonlinear equivalent micropolar beam model to analyze nonlinear vibration for large space truss structure, and also proposes a lattice enhancement method to improve the cantilever truss for the buckling problem that exists in space cantilever truss structures. The nonlinear equivalent model is obtained by introducing a co-rotating coordinate system into the linear equivalent beam model. Since the instability of the fixed root end of the cantilever truss is the main reason for buckling, the method of strengthening the longeron of the truss lattice by lattice is proposed. The accuracy of the equivalent geometric nonlinear model and the effectiveness of the improved cantilever truss structure are verified by four numerical simulation examples. The methods proposed in this paper provide some reference for studying the dynamics analysis of large space trusses and the design of structures.
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几何非线性大空间天线桁架等效梁模型及改进结构设计
本文提出了一种扩展线性等效方法,将线性等效微极梁模型扩展到非线性等效微极梁模型,用于分析大型空间桁架结构的非线性振动,并针对空间悬臂桁架结构中存在的屈曲问题,提出了一种改进悬臂桁架的点阵增强方法。在线性等效梁模型中引入共旋转坐标系,得到非线性等效梁模型。由于悬臂桁架的固定根端失稳是导致其屈曲的主要原因,提出了一格一格加强桁架纵梁的方法。通过四个数值仿真算例验证了等效几何非线性模型的准确性和改进悬臂桁架结构的有效性。本文所提出的方法为研究大空间桁架的动力学分析和结构设计提供了一定的参考。
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来源期刊
CiteScore
4.00
自引率
10.00%
发文量
72
审稿时长
6-12 weeks
期刊介绍: The purpose of the Journal of Computational and Nonlinear Dynamics is to provide a medium for rapid dissemination of original research results in theoretical as well as applied computational and nonlinear dynamics. The journal serves as a forum for the exchange of new ideas and applications in computational, rigid and flexible multi-body system dynamics and all aspects (analytical, numerical, and experimental) of dynamics associated with nonlinear systems. The broad scope of the journal encompasses all computational and nonlinear problems occurring in aeronautical, biological, electrical, mechanical, physical, and structural systems.
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