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本文采用SAP5线性静动通用程序,对某导弹战斗部模型进行了静态和动态分析计算。在动态分析中,除了计算特征值和特征向量外,主要用振型迭加法和逐步积分方法,对战斗部穿甲时的瞬态响应进行了一定的探讨和计算,给出个几种情况下的位移、应力历程结果和曲线。结果表明,我们的计算与国外用SAP4程序的计算完全一致。我们认为用有限元方法分析瞬态冲击问题是行之有效的。
In this paper, the static and dynamic analysis and calculation of a missile warhead model are carried out using the SAP5 linear static and dynamic procedure. In the dynamic analysis, in addition to calculating the eigenvalues and eigenvectors, the transient response of the warhead piercing is discussed and calculated by using the superposition of modes and the method of stepwise integration. Several cases are given Displacement, stress history results and curves. The results show that our calculation is exactly the same as the calculation of SAP4 programs abroad. We think it is effective to analyze the transient impact problem by finite element method.