摘要
为了分析铝合金板架结构对砰击载荷的响应规律及确定计算参数,以某船用铝合金板架为研究对象,运用Patran/Nastran进行非线性瞬态响应分析,首先分析了阻尼效应和应变率效应,之后将试验得到的真实砰击载荷简化为Ochi提出的三角形砰击载荷,最后分析了峰值出现时间和连续砰击次数对板架瞬态响应的影响。仿真结果表明:在铝合金板架瞬态响应计算中,材料的阻尼和应变率可以不考虑;峰值出现时间越早,板架变形越大;板架变形随着砰击次数的增加而增大,但在第3次后趋于稳定。本文得到的结果可为铝合金质船体结构的砰击动力响应分析提供参考。
In order to analyze the dynamic response law of Aluminum Alloy Aluminum Alloy plate frame structure under slamming loads, and determine the parameters in the calculation, using a ship Aluminum Alloy plate frame as the research object, using Patran/Nastran nonlinear transient response analysis, firstly analyzes the damping effect and strain rate effect, after that, the actual slamming load is simplified as a triangular slamming load proposed by Ochi. Finally, the influence of the peak emergence time and the number of consecutive slamming on the transient response of the frame is analyzed.The simulation results show that in the Aluminum Alloy plate frame transient response calculation, material damping and strain rate have little influence;The peak time is early, the greater the deformation of plate frame;And frame deformation increases with the number of impact, but tends to be stable after the third. The results obtained in this paper can be used as a reference for slamming dynamic response analysis of aluminum alloy hull structures.
作者
卢清亮
吴梵
滑林
LU Qing-liang;WU Fan;HUA Lin(Naval University of Engineering,Department of Naval Architecture,Wuhan 430033,China)
出处
《舰船科学技术》
北大核心
2019年第3期45-49,共5页
Ship Science and Technology
关键词
砰击
铝合金
应变率
瞬态响应
slamming
aluminum alloy
strain rate
transient response
