中文摘要：

分布的瞬态冲击载荷是一种比较特定的情形,可见于航空航天飞行器高速飞行时的某些特定状态。这些特定的飞行状态往往对飞行器安全构成较大的危害。针对这些特定状态的地面振动考核试验往往是不可或缺的。文中研究基于遗传优化算法,将分布的瞬态冲击载荷等效转换为若干集中载荷的理论分析与计算方法。研究结果表明,基于模态响应等效原则下的载荷转换效果,在经过遗传算法对转换的集中力各有关参数的优化选择后,其时域平均误差约为1.0 dB,表明本研究可为航空航天产品某些特定动力学环境的地面振动考核试验提供一种加载的参考方法。

英文摘要：

The distributed and shock dynamic load is a kind of special case for aeronautic or spaceflight weapon.It is possible to cause the severe damage of these structures under the special cases.It may be necessary for the ground vibration test based on the speical cases.The theoretical analysis method and numerical simulation computations programs how to translate the distributed and shock dynamic load into several equivalent centralized loads for the ground vibration test are proposed.The researches showed that,under the equivalent rule of structural modal responses,the average error of both responses is about 1.0 dB through optimizing parameters of the equivalent centralized loads using genetic algorithms,so it is possible to provide a feasible method for the vibration experiments on the ground for safety evaluation of high flying structures.