基于双向流固耦合的锥阀阀芯位移可靠性分析  

Displacement Reliability Analysis of Cone Valve Spools Based on Bidirectional Fluid-Solid Coupling

作　　者：黄贤振[1,2] 栾晓刚 朱丽莎 刘慧珍 HUANG Xian-zhen;LUAN Xiao-gang;ZHU Li-sha;LIU Hui-zhen(School of Mechanical Engineering&Automation,Northeastern University,Shenyang 110819,China;Key Laboratory of Vibration and Control of Aero-Propulsion Systems,Ministry of Education,Northeastern University,Shenyang 110819,China;School of Mechanical&Automotive Engineering,Zhaoqing University,Zhaoqing 526061,China)

机构地区：[1]东北大学机械工程与自动化学院,辽宁沈阳110819 [2]东北大学航空动力装备振动及控制教育部重点实验室,辽宁沈阳110819 [3]肇庆学院机械与汽车工程学院,广东肇庆526061

出　　处：《东北大学学报（自然科学版）》2023年第5期667-673,共7页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(51975511,51975110,U22B2087);肇庆学院创新科研团队资助项目。

摘　　要：传统的阀芯位移稳定性是在系统参数确定的前提下进行的,然而,在实际生产的使用过程中,各种系统参数具有不确定性.针对此问题,建立了一个锥阀工作动态过程的有限元分析模型,采用双向流固耦合和重叠网格方法分析求解压力入口下锥阀的动态响应过程.考虑参数随机性的影响,以阀芯稳定后位移是否超过许用位移量为衡量标准建立阀芯位移波动的极限状态方程,通过Monte-Carlo仿真和Kriging方法,对阀芯稳定后位移的波动情况进行了可靠性分析.研究发现,阀芯稳定位移波动范围小于理论值的19%,阀芯稳定位移的可靠度随着入口压力的增大而降低.The traditional spool displacement stability is carried out on the premise that the system parameters are determined.However,in the process of actual production and use,various system parameters are uncertain.To solve this problem,a finite element analysis model of the cone valve’s dynamic process was established,and the dynamic response process of the cone valve under the pressure inlet was analyzed and solved by the bidirectional fluid-solid coupling and the overlapping grid method.Considering the influence of parameter randomness,the limit state equation of the spool displacement fluctuation was established based on whether the displacement after the spool stabilizes exceeds the allowable displacement.The reliability analysis of the displacement fluctuation after the stability of the spool was carried out by the Monte-Carlo method and Kriging method.It was shown that the stable displacement fluctuation range of the spool is 19%less than the theoretical value,and the reliability of the stable displacement of the spool decreases as the inlet pressure increases.

关 键 词：可靠性 锥阀 流固耦合 Monte-Carlo仿真 KRIGING方法 

分 类 号：TH137.5[机械工程—机械制造及自动化] TH122