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本文给出一个新的冲击动荷计算方法——瑞利-有限元法。此法的基本思想是先将一个具有无穷多自由度的系统用有限单元法的原理,离散成一个有限自由度的系统。进而再建立它的单自由度等效系统。应用这种方法可以把考虑动能损失的冲击动荷计算方法——瑞利法的应用,从简单构件推广到一般结构。因此,本文给出的方法是冲击动荷计算理论与应用方面的一个进步和发展。
In this paper, a new method of calculating the dynamic load of shocks is presented, namely Rayleigh-Finite element method. The basic idea of this method is to first disassemble a system with infinite degrees of freedom into a system of finite degrees of freedom using the principle of the finite element method. Then establish its single degree of freedom equivalent system. This method can be applied to the impact dynamic charge calculation method considering the loss of kinetic energy—the application of Rayleigh method, from a simple component to a general structure. Therefore, the method given in this paper is a progress and development in the theory and application of dynamic charge calculation.