Study on Comparison of Atmospheric and Vacuum Environment of Thermally-Induced Vibration Using Vacuum Chamber

Abstract

The present paper studies the thermally-induced vibration phenomenon of the flexible space boom structure. In order to simulate the thermally-induced vibration phenomenon of the flexible thin boom structure of the spacecraft with the attached tip mass in space, the thermally-induced vibration including thermal flutter is experimentally investigated at various thermal environments using a heating lamp in vacuum chamber. In this experimental study, fluctuating characteristics, natural frequency and thermal strains of the thermally-induced vibration are parametrically investigated at various thermal environment conditions. Finally the thermally-induced vibration of the flexible boom structure of the orbiting earth satellite in solar radiation environment from the earth eclipse region including umbra and penumbra is simulated using the power control of the heating lamp in the vacuum chamber.

Thermally Induced Vibration Analysis of Composite Laminate Based on Equivalent Displacement Method

“…The TIV of a beam or a plate is induced by a kind of time-dependent thermal moments due to the rapid temperature gradients in the structure [1,2,14]. Foster et al [11] and Kong et al [12] used experimental method to study TIV of spacecraft structures. An analytical approach of TIV was used to determine the response of Hubble space telescope's solar array by Thornton et al [13].…”