摘要
针对弹性楔形体砰击载荷及结构响应问题,采用理论解析计算方法以及任意拉格朗日-欧拉(arbitrary Lagrangian-Eulerian,ALE)流固耦合数值计算方法开展研究。分别分析不同边界条件、入水速度、板厚以及斜升角对弹性结构所受砰击力及结构响应的影响及变化规律,并探讨砰击载荷时间历程和物面分布特性。结果表明,通过增大斜升角可有效降低弹性楔形体砰击载荷和结构响应,斜升角自10°增大至30°,无量纲砰击力峰值减小至6.9%,结构变形极值减小至6.5%。可通过水弹性因数R_(F)=C_(B)_(tan)β√EI/(ρL^(3))/ν评估板厚、入水速度、斜升角以及边界条件对砰击载荷作用下结构水弹性效应的影响,在水弹性因数RF>1.71时,可采用理论解析方法高效高精度预报砰击载荷作用下弹性楔形体结构变形响应。
The slamming load and structural response of flexible wedges were investigated by both analytical methods and numerical simulations based on the ALE(arbitrary Lagrangian-Eulerian)coupled method.The cases with various boundary conditions,impact velocities,thicknesses and deadrise angles were simulated and the corresponding slamming loads and the structural responses were discussed as well.The slamming load and the structural response are susceptible to the variation of the deadrise angle.To increase the deadrise angles is an effective way to ensure the structural strength concerning about the impact load.With the increase of the deadrise angle from 10°to 30°,the dimensionless slamming load decreased to 6.9%and the structural response decreased to 6.5%.The hydroelastic effects of the response of the flexible structure under slamming load can be evaluated by the factor R_(F)=C_(B)_(tan)β√EI/(ρL^(3))/ν which combining with boundary condition,deadrise angle and rigidity of the structure.If the RF>1.71,the hydroelastic analytical method is an efficient and effective way to evaluate the response of the flexible structure under slamming load.
作者
王一雯
郑成
吴卫国
WANG Yiwen;ZHENG Cheng;WU Weiguo(Green&Smart River-Sea-Going Ship,Cruise and Yacht Research Center,Wuhan University of Technology,Wuhan 430063,Hubei,China)
出处
《爆炸与冲击》
EI
CAS
CSCD
北大核心
2021年第11期97-112,共16页
Explosion and Shock Waves
基金
高技术船舶科研项目(2014[493])
基础加强计划重点基础研究(2020-JCJQ-ZD-225-11)。
关键词
水弹性效应
弹性楔形体
砰击入水
流固耦合
hydroelastic effect
flexible wedge
water impact
fluid-structure interaction
