THERMALLY-INDUCED VIBRATIONS OF A SPINNING SPACECRAFT BOOM

被引：30

作者：

GULICK, DW ^{[1
]}

THORNTON, EA ^{[1
]}

机构：

[1] UNIV VIRGINIA,DEPT MECH AEROSP & NUCL ENGN,CHARLOTTESVILLE,VA 22903

来源：

ACTA ASTRONAUTICA | 1995年 / 36卷 / 03期

关键词：

D O I：

10.1016/0094-5765(95)00097-J

中图分类号：

V [航空、航天];

学科分类号：

08 ; 0825 ;

摘要：

An analytical study of thermally-induced motions is presented for a beam model of an axial boom of a spin-stabilized spacecraft. The study includes: (1) an uncoupled thermal-structural analysis which assumes that the temperature distribution is independent of the deflections of the boom and (2) a coupled thermal-structural analysis which includes the dependence of the incident heat flux and temperature distribution on the boom's deflected position. In the uncoupled analysis, a steady-state thermal response is determined. The resulting temperature gradient causes stable bending motions which are determined by modal expansion. The coupled analysis assumes a deflected shape and determines governing equations for an approximate response. The stability of the coupled response is studied using Floquet theory. The results show that unstable thermally-induced vibrations are possible for parameters characteristic of a typical spacecraft's axial boom.

引用

页码：163 / 176

页数：14

共 11 条

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