The purpose of this study is to analyze the phenomena of the therm ally-induced vibration for the flexible space structure due to abrupt change of radiation heating circumstance using the numerical
analyze and experiment test. In order to verify this structure, numerical approaches on the simplified flexible tube were compared with experimental test results at the ground experimental facility. In this analyze, it was found that the thermal deformation occurs firstly due to fast radiation heating of
flexible structure and then the thermally-induced vibration would be induced due to small periodic change of temperature. According to comparison of numerical and experimental results, in case of no tip mass, the first mode vibration by the numerical analyze was 0.78Hz same as that of the experimental result. However in case of increase tip-masses of 8g, 16g, 50g and 100g. the first modes
vibration theoretical analyze were 1.75Hz. 1.3Hz, 0.87Hz and 0.73Hz, in decrease trend respectively and those by experimental test were 2.34Hz, 1.5Hz, 0.78Hz and 0.78Hz in decrease trend respectively. Although using the simpled equation for the estimation, the estimation results were similar to experimental results.