Penetration performance in surface layer of concrete target was analyzed by stress wave damage theory, calculating method base on "simplified equivalent resistance line" was presented.
从应力波表层损伤理论分析了混凝土表层“开坑区”的侵彻特性，提出“简化等效阻力线”的计算方法；
Making use of equivalent density the model is simplified effectively, a simple and feasible method is offered for mode estimation of a missile's large-scale finite-element model.
同时利用等效密度有效地简化模型，为导弹大型有限元模型的模态估计提供了一种简单可行的方法。
Thmugh the comparison with both the simplified method of structural mechanics and the finite element equivalent stress method, the feasibility of the method is verified.
通过与结构力学简化方法和有限元等效应力法的比较，验证了该方法的可行性。
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