Dynamic Characteristics of Inflated Torus Using Finite Element Analysis

作     者：KAMEL M A 

作者机构：School of AstronauticsBeijing University of Aeronautics and Astronautics 

出 版 物：《Computer Aided Drafting,Design and Manufacturing》 (计算机辅助绘图设计与制造（英文版）)

年 卷 期：2010年第20卷第1期

页      码：15-20页

摘      要：In recent years, inflatable structures have been a subject of interest for space applications such as communication antenna, solar thermal propulsion and entry/landing systems. The inflatable structures characterized by high strength-to-mass ratios, minimal stowage volume, which makes them suitable for cost-effective large space structures. A typical example for the inflatable structure is the inflated torus which often used in order to provide structure support. In this study, our main focus is to understand the dynamic characteristics of an inflated torus in order to formulate an accurate mathematical model suitable for active vibration control applications. A commercial finite element package, ANSYS, is used to model the inflated torus. To verify the model the obtained frequencies and mode shapes are compared with the published results, which are derived using analytical approach, the verification shows a good agreement between the FEM and the analytical results. Based on the verified model, parametric study was investigated; the material thickness increase causes the natural frequencies decrease, while the increase of the inflation pressure simply results in stiffening the ring, which means that the natural frequency increased. The FEM analysis gives an easy and fast way for the vibration analysis of the structures compared with the complicated analytical solutions.

主 题 词：dynamic characteristics inflatable torus finite element modelling (FEM) modal analysis 

学科分类：07[理学] 070104[070104] 0701[理学-数学类] 

D　O　I：10.19583/j.1003-4951.2010.01.003

馆 藏 号：203795203...