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为了研究精确制导武器对框架结构的毁伤效应和破坏规律。基于ANSYS/LS-DYNA非线性动力有限元程序理论,考虑炸药、空气及其与结构的耦合作用,采用适合于处理大变形问题的ALE流固耦合算法,建立了框架结构整体的数值计算模型。对导弹爆炸荷载作用下框架结构的爆炸破坏过程进行了数值模拟,其结果较好地反映了爆炸毁伤作用过程。对框架整体的毁伤效应进行了分析,得到结构毁伤破坏规律;研究了毁伤效应对炸药量、起爆点位置以及结构延性等因素的敏感性,其中爆点位置是影响结构毁伤程度最敏感的因素。研究结果可为建筑物毁伤效应评价准则的建立提供一定的支持。
In order to study the damage effect and destruction law of the precision guidance weapon to the frame structure. Based on the ANSYS / LS-DYNA nonlinear dynamic finite element program theory, considering the coupling between explosive and air and its structure, a numerical simulation model of the whole frame structure is established by using the ALE fluid-solid coupling algorithm suitable for large deformation. The explosion process of the frame structure under the explosive load of the missile is numerically simulated. The results reflect the damage damage process well. The damage effect on the whole frame is analyzed to get the rule of damage to the structure. The sensitivity of the damage effect to the amount of explosive, the location of initiation point and the ductility of the structure are studied. The location of the explosion point is the most sensitive factor that affects the damage degree of the structure. The results can provide some support for the establishment of building damage evaluation criteria.