高压物理学报2016，Vol.30Issue(6)：531-536,6.DOI:10.11858/gywlxb.2016.06.015
爆炸波问题中偶然不确定度的量化
Quantification of Aleatory Uncertainty in Blast Wave Problem
摘要
Abstract
As uncertainty always exists in the modeling and simulation of complex engineering problems, the identification and analysis of its source and the quantification of its degrees play an important role in assessing the credibility of the modeling and simulation results.In this paper,the concept of uncertainty as well as uncertainty quantification process was presented in the modeling and simulation,with the blast wave problem used as a typical example to illustrate the detailed process for the quantification of the aleatory uncertainty.The expectations and variances of density,pressure,velocity and internal energy were calculated and,moreover,the probability density function of the shock wave position was obtained using the Monte-Carlo and the non-intrusive polynomial chaos (NIPC).The results were consistent with each other,which verified that the NIPC method is an efficient approach in the uncertainty quantification of a complex nonlinear system.关键词
激波位置/建模与模拟/爆炸波/非嵌入多项式混沌/不确定度量化Key words
shock position/modeling and simulation/blast wave/non-intrusive polynomial chaos/uncertainty quantification分类
数理科学引用本文复制引用
梁霄,王瑞利..爆炸波问题中偶然不确定度的量化[J].高压物理学报,2016,30(6):531-536,6.基金项目
国家自然科学基金（11372051，11201035，11475029）；中国工程物理研究院科学技术基金（2015B0202045）；山东科技大学人才引进项目 （）
