多次冲击波作用下加筋板动态响应数值模拟研究  

Numerical simulation study on dynamic response of stiffened plate under multiple shock waves

作　　者：崔皓 张劲夫[1] 翟红波[2] 田魏婧 刘永寿[1] CUI Hao;ZHANG Jinfu;ZHAI Hongbo;TIAN Weijing;LIU Yongshou(School of Mechanics Civil Engineering and Architecture,Northwestern Polytechnical University,Xi’an 710129,China;Xi’an Modern Chemistry Research Institute,Xi’an 710065,China)

机构地区：[1]西北工业大学力学与土木建筑学院,西安710129 [2]西安近代化学研究所,西安710065

出　　处：《兵器装备工程学报》2022年第11期123-129,共7页Journal of Ordnance Equipment Engineering

基　　金：多次冲击波作用下典型金属框架结构累积毁伤效应研究(SYJJ200320)。

摘　　要：加筋板在结构防护领域有着广泛应用,在复杂战场上易受多次冲击波作用,形成损伤甚至破坏,其防护性能直接影响着武器装备的使用寿命。基于金属材料高应变速率的本构方程和结构动力响应分析方法,运用数值模拟的方法分析了多次冲击波作用下加筋板结构的动态响应,获得了加筋板结构形式、边界条件对加筋板动态响应的影响规律。揭示了不同构型加筋板在多次冲击波作用下不同的失效模式,以及随冲击次数的增加,不同失效模式的转化过程。此外,研究发现:随边界约束能力的减弱,加筋板的失效模式由边界处的拉伸撕裂转变为加强筋的断裂。研究结果对工程中的冲击防护问题具有指导意义。The stiffened plate structure has a wide range of applications in structural protection.Its protective effect seriously affects the service life of the structure.To explore the damage law of stiffened plate structure subjected to multiple impacts,a study on the dynamic response of stiffened plate under multiple impact was analyzed by numerical simulation method.In addition,it was also studied that the influence of structural form of stiffened plate and boundary condition on the dynamic response of stiffened plate.The simulation reveal the failure modes of stiffened plates subjected to multiple shock waves and the process of transformation After that,it is pointed out that stiffened plates with cross stiffeners were obviously better than that of single direction stiffened plates and the anti-knock property of stiffened plate increased with the increase of the number of stiffeners.In addition,with the weakening of boundary restraint ability,the failure mode of stiffened plate changes from tensile tear at the boundary to fracture of stiffener.The research results have guiding significance for the impact protection in engineering.

关 键 词：加筋防护结构 爆炸冲击 多次冲击 冲击波 失效模式 应变率 

分 类 号：O347.5[理学—固体力学]