薄膜充气环动态特性试验研究

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振动与冲击 ›› 2013, Vol. 32 ›› Issue (7) : 11-16.

论文

薄膜充气环动态特性试验研究

余建新1,2，卫剑征1，谭惠丰1

作者信息 +

Experimental investigation on thin film inflatable torus

YU Jian-xin1,2, WEI Jian-zheng1, TAN Hui-feng1

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文章历史 +

摘要

充气环是新一代大型空间薄膜结构的主要支撑部件，它具有轻质柔性、局部抗弯刚度低、几何非线性、高阻尼等特点。本文针对薄膜充气环动态特性，建立了一套柔性结构的动态测试系统。由于采用普通力锤极易引起结构的局部变形，本文改进了激励方式，得到薄膜充气环的面内和面外振动频响函数。通过复模态指示函数识别极点数目，采用多项式拟合识别出结构的固有频率，阻尼比和振型。分析不同充气压力下结构动态特性的变化规律，并对薄膜充气结构动态特性测试相关问题进行讨论，实验结果为空间薄膜结构有限元模型有效性验证提供依据。

Abstract

Thin film inflatable torus are main supporting structures for next generation large space membrane spacecrafts, its intrinsic properties are high flexibility, low bending stiffness, nonlinear geometrical deformation and strong damping et al. In this study, an experimental test system was assembled to investigate the dynamic properties of thin film inflatable torus. Due to traditional hammer induce local deformation, the excitation method was modified. In plane and out of plane frequency response function of thin film inflatable torus were collected, the poles number were discerned by complex modal index, and the structural natural frequencies, damping as well as mode shapes were identified through polynomial fitting process. The dynamic properties of different internal gas pressure were analyzed and issues relate to experimental test were discussed，experimental results can be used for finite element model validation and verification of space thin film structures.

导出引用

余建新;卫剑征;谭惠丰. 薄膜充气环动态特性试验研究[J]. 振动与冲击, 2013, 32(7): 11-16

YU Jian-xin;WEI Jian-zheng;TAN Hui-feng. Experimental investigation on thin film inflatable torus[J]. Journal of Vibration and Shock, 2013, 32(7): 11-16