摘要
水下爆炸冲击波和气泡载荷对舰船结构都有不同程度的毁伤作用,计算舰船结构在水下爆炸载荷作用下的塑性变形时,需要同时考虑两种载荷的影响。通过对加筋板结构刚塑性分析,运用Lagrangian方程,得到一种计算冲击波和气泡脉动压力波联合作用下加筋板塑性变形的方法。该方法计算结果与试验值和文献值吻合较好。对该计算方法的适用范围进行讨论,认为对于计算的加筋板模型,当R/W大于2.55时,可以忽略气泡载荷对加筋板塑性变形的影响;当R/W小于1.05时,需要对结构进行应变分析。
Underwater explosion shockwave and bubble impulsive load,which can do damage to the warship structure in different degrees,should be taken into account at a time when the plastic defor-mation caused by underwater explosion is calculated.By analyzing the rigid-plastic property of stif-fened plate structure and using Lagrangian equation,a theoretical method was obtained for calculating the plastic deformation of stiffened plate due to underwater explosion shockwave and bubble impulsive load.The theoretical method and experimental results matched well with each other.According to the application range of the theoretical method,when the R/W1/3 is larger than 2.55,the influence of bubble load can be ignored;when the R/W1/3 is smaller than 1.05,the strain analysis of stiffened plate should be taken into consideration.
出处
《海军工程大学学报》
CAS
北大核心
2011年第6期8-13,19,共7页
Journal of Naval University of Engineering
基金
国家安全重大基础研究项目(51335020102)
关键词
水下爆炸
冲击波
气泡脉动压力
加筋板
塑性变形
underwater explosion
shockwave
bubble impulsion pressure
stiffened plate
plastic deformation