高温高速移動内圧を受ける円管の熱変形挙動
2004 年 53 巻 6 号 p. 639-646
詳細
2004 年 53 巻 6 号 p. 639-646
The thermal deformation of a circular tube subjected to high-temperature and high-rate moving internal pressure was examined experimentally and analyzed numerically with FEM code, Marc. The time histories of temperature were observed from thermo-couples embedded at several positions along the circular tube with a constant cross-section. Also, the time histories of high-rate moving internal pressure were measured by piezoelectric elements embedded in the inner surface layer of the circular tube. As the first step of numerical analysis, the thermal conductivity analysis was carried out to predict the time histories of temperature at inner surface of the circular tube under the condition of two-dimensional small section model in the cylindrical coordinates. In the second step, the whole temperature distribution of circular tube was calculated using the results of the first step analysis. Additionally, thermal stress analysis was carried out based on the results of the whole temperature distribution of circular tube and thermal deformations of inner and outer surfaces of the circular tube were successfully predicted.
