自由面对冲击波作用下的圆柱瞬态响应的影响  

Influence of a free surface on the cylinder transient response under the action of an underwater shock

作　　者：朱艳[1] 郭百森 魏海鹏 赵蛟龙[3] 杨衡[3] 姚熊亮[3] 

机构地区：[1]西北工业大学航空学院,陕西西安710072 [2]北京宇航系统工程研究所,北京100076 [3]哈尔滨工程大学船舶工程学院,黑龙江哈尔滨150001

出　　处：《哈尔滨工程大学学报》2012年第7期801-805,共5页Journal of Harbin Engineering University

基　　金：国家自然科学基金资助项目(50809018);国家自然科学基金重点资助项目(50939002)

摘　　要：针对自由液面效应影响下的瞬态载荷作用下圆柱体的流固耦合数值计算问题,在双渐近法(DAA)的基础上,经推导得到考虑自由液面兴波效应的修正DAA方程.将该方程引入到自由面附近结构瞬态运动问题的流固耦合计算中,给出修正二阶双渐近法(DAA2)方程.将数值计算结果与实验结果相比较,验证了程序的合理性.在此基础上,分析了水深对结构流固耦合动态特性的影响.研究结果表明:自由液面效应对近自由液面附近结构的动态特性(尤其是结构运动中后期)有很大影响.In consideration of the problem of the fluid-structure coupling numerical calculation under an transient load with free-surface effect, this paper built a modified doubly asymptotic approximation （DAA） equation considering the free surface wave-making effect based on the DAA. The equation was introduced to the fluid-structure interacting calculation of the structure＇s transient motion problems near the free-surface, and a modified DAA2 equation was given. By comparing the results of numerical calculation with the experiment, the reasonability of the procedure was validated. This paper analyzed the effects of different water depths on the structure dynamic characteristics of fluid-solid interaction. The research results indicate that the free-surface effect has a great influence on the structure dynamic characteristics, especially on the metaphase and anaphase of the structure＇s motion.

关 键 词：双渐近法 流固耦合 自由面 瞬态响应 水下冲击 

分 类 号：O352[理学—流体力学]