某导弹水下发射过程中的强度研究

STUDY ON THE STRENGTH OF A MISSILE LAUNCHED FROM UNDERWATER

导弹水下发射时其弹体承受加速载荷、高气压载荷和热载荷,是弹体最恶劣的工况环境。文中建立导弹壳体的非稳态温度分布模型,结合发射管压强和温度场的变化情况,基于有限元方法,运用大型工程分析软件对弹体总体及分段进行高温瞬变温度场、瞬变压力场以及加速动载荷时的壳体应力、变形计算研究。分析计算结果与实验结果相吻合,验证方法的合理性和有效性。该方法理论明晰、操作方便,便于工程应用。

A missile＇ s body endures acceleration load, high gas pressure load and heat load when it is launched from underwater. Launching from underwater can be considered as the most dangerous condition for missile＇ s body. A model of an unsteady temperature field in shell of missile was built. The variable pressure and temperature field of inside space of launch tube were considered. Based on finite element method, utilizing the engineering analysis software ideas, considering the variable high temperature field, variable pressure field and acceleration load, the shell stress and strain of overall the body and parts of body were calculated and studied. The calculation results are similar to test results, and this analysis method is proved. The theory of this method is clear, and can be used for engineering practice easily.