摘要
为探究土中浅埋直墙拱结构轴向荷载分布规律,利用LS-DYNA软件模拟了在不同爆炸距离和装药量条件下结构的轴向荷载分布情况。对比不同装药质量及不同爆炸距离作用下轴向荷载的分布形态发现,对于发生整体响应的结构,其轴向荷载分布形态仅受爆炸距离控制,并可用正态分布函数描述。基于对爆炸距离与荷载分布形态的函数关系拟合,得出了爆炸作用下拱结构轴向荷载分布形态的计算方法。基于正态分布置信区间理论,计算不同置信区间的结构响应,提出了一种确定拱结构轴向荷载计算范围的方法。
In order to explore the law of axial load distribution of the shallowly-buried straight-wallround-arch structure in soil,the axial load distributions of the structure under different charge masses with different explosion distances were simulated by LS-DYNA.By comparing the distributions of axial load under different charge masses with different explosion distances,it is found that the axial load distribution of the structure with overall response is only affected by the explosion distance,and the load distribution can be described by the normal distribution function.Based on the fitting of the functional relationship between the explosion distance and the load distribution pattern,the calculation method of the axial load distribution pattern of the arch structure under explosion is obtained.A method for determining the calculation range of axial load of arch structure with the theory of normal distribution confidence interval is proposed by numerical simulation of structural response under different confidence intervals.
作者
陈昊
卢浩
孙善政
熊自明
王德荣
岳松林
CHEN Hao;LU Hao;SUN Shanzheng;XIONG Ziming;WANG Derong;YUE Songlin(College of National Defense Engineering,Army Engineering University of PLA,Nanjing 210007,China)
出处
《陆军工程大学学报》
2023年第5期52-59,共8页
Journal of Army Engineering University of PLA
基金
国家自然科学基金(51808552)。
关键词
土中爆炸
浅埋结构
直墙拱结构
荷载分布
explosion in soil
shallowly-buried structure
straight-wall-round-arch structure
load distribution
