温度交变载荷对药柱结构完整性的影响分析

为研究温度交变载荷对药柱结构完整性的影响,使用Abaqus软件对特定温度载荷下的某发动机药柱进行了有限元计算,获得了药柱温度场和应力场,得到了不同部位温度-时间曲线,并评价了危险部位的安全系数。开展了温度平衡试验,将有限元计算结果与试验结果进行了对比。结果表明,有限元计算结果与试验结果吻合较好,药柱靠近壳体部位温度变化快,靠近中孔部位温度变化慢,并且翼槽和人脱根部为应力应变危险部位。

Influence of temperature load on structural integrity of propellant grains

To investigate the influence of temperature load on grain structure integrity of solid propellants, the numerical simu-lation under certain temperature load conditions were carried out by means of Abaqus. The temperature and stress field of the grain was obtained, and the safety factors of the high-risk parts were evaluated. The temperature balance tests were carried out as well, which were compared with the calculated results. It has been shown that the calculated results agree well with the tested ones. The temperature changes fast near the case, while it is slow near the grain perforation. The fin-slots and the bottom of the artificial debonded layer are the most dangerous positions.