关键词: 两相流, 可靠性分析, 区间, 混合模型, 机车侧墙过滤系统

Abstract:  A two-phase flow reliability analysis method was proposed for locomotive side wall filtration systems with interval non-random load uncertainty， considering the difficulty of modeling the cognitive uncertainty of load parameters and combining the randomness of manufacturing and installation， aiming at the reliability problems of the locomotive side wall filtration systems with the changes of operating environments. Firstly， the CFD model of two-phase flow in the filter system of the locomotive side walls was established through experimental comparison. Secondly， the reliability analysis of the two-phase flow mechanics problem of the locomotive side wall filtration systems was carried out by using the probabilistic and interval mixed uncertainty model and the corresponding effective reliability analysis method. The structural parameters with sufficient samples and load parameters with insufficient samples were measured by probability and interval method respectively. The difficulty of modeling cognitive uncertainty caused by insufficient samples could be quickly solved， which extended the applicability of reliability analysis technique of interval mixed uncertainty in the study of two-phase flow mechanics problems. Through the study of load reliability problems such as resistance and filtration efficiency of two-phase flow problem of electric locomotive side wall filtration systems， reasonable improvement of the uncertainty level of key parameters may take into account the cost， and improve the reliability of the filtration systems， Which meets the requirements of high reliability applications in complex operating environments of electric locomotives， and provides reference for engineering applications. 

Key words: two phase flow, reliability analysis, interval, hybrid model, locomotive side wall filtration system