针对冲击波作用下的结构毁伤判据问题,利用LS-DYNA软件,对LY12铝合金平板结构的损伤过程进行了数值模拟.讨论了冲击波超压、正压作用时间、材料屈服强度和结构自振频率等因素对结构破坏的影响规律,提出了一个以超压为函数,以正压作用时间、材料屈服强度和结构自振频率为参量的破坏判据,与实验结果比较,该判据吻合程度较高.%By using the numerical simulation software LS-DYNA, shock damage processes of LY12 a-luminum alloy plate is simulated for the failure criterion research. The influencing factors such as the peak overpressure, positive phase duration, yield strength of material, and natural vibration frequency of the structure are analyzed. A failure criterion based on these parameters is preposed and it agrees with the experimental results.
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