摘要
在舰船结构毁伤数值仿真模型和算法走向工程应用前,其合理性和有效性必须得到准确的验证与确认。本文借鉴近年来计算结构力学、计算流体力学等相关领域数值仿真模型算法的验证与确认概念、规范、策略、方法,以舰船受水下爆炸作用的响应模型建立与仿真为例,提出远场水下爆炸作用下舰船结构响应仿真的验证与确认方法和典型流程。水下远场爆炸Geers-Hunter气泡模型、模态展开法、逐步法、二维船体梁有限元的程序经过验证与分层确认,仿真模型对船体鞭状响应的应变和弯矩仿真结果与试验结果综合误差因子在0.25以内,该程序对水下远场爆炸脉动压力作用的船体响应预报结果可信。相关流程与基本方法对其他水下爆炸工况下舰船结构毁伤数值仿真模型的验证与确认也有一定借鉴意义。
The numerical simulation models and algorithms of ship structural damage must be verified and validated before the industrial application.This article draws lessons from the recently developed concepts,standards,strategies and methods of verification&validation in relevant areas such as computational structural mechanics(CSM)and computational fluid mechanics(CFD).Taking the response model,of which,a ship subjected to underwater explosion as an example,the methods,strategies and typical procedures have been presented for the verification&validation of the simulation of warship structural response subjected to far field underwater explosion.The Geers-Hunter bubble model of underwater far field explosion,modal expansion method,step-by-step method and two-dimensional hull girder FEM are verified and validated hierarchically,the comprehensive error factors between the simulation results and test results for the strain and torque of the ship whip-like response are within 0.25,the results of the ships response to underwater far field explosion,predicted by the simulation code,is therefore reliable.The methods and procedures proposed by this article could be significant to the verification&validation of the simulation of warship structural damage in other underwater explosion conditions.
作者
徐嘉启
陈高杰
XU Jiaqi;CHEN Gaojie(No.91388 Unit of PLA,Dalian 116041,China)
出处
《舰船科学技术》
北大核心
2024年第23期15-23,共9页
Ship Science and Technology
关键词
水下爆炸
远场
舰船结构响应
underwater explosion
far field
warship structural response
作者简介
徐嘉启(1991-),男,博士,工程师,研究方向为舰艇结构毁伤与抗冲击。
