Research on the method of verification & validation of the response model of ships subjected to underwater explosion bubble fluctuating pressure
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 ex-plosion,modal expansion method,step-by-step method and two-dimensional hull girder FEM are verified and validated hier-archically,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 veri-fication & validation of the simulation of warship structural damage in other underwater explosion conditions.
NETL
NSTL
万方数据
