直动式溢流阀的压力波动可靠性灵敏度分析  

Reliability Sensitivity Analysis of Pressure Fluctuations for Direct-Acting Relief Valves

作　　者：查从燚 孙志礼[1] 刘勤[2] 董鹏飞 ZHA Cong-yi;SUN Zhi-li;LIU Qin;DONG Peng-fei(School of Mechanical Engineering&Automation,Northeastern University,Shenyang 110819,China;Ordnance Science and Research Academy of China,Beijing 100089,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]中国兵器科学研究院,北京100089

出　　处：《东北大学学报(自然科学版)》2024年第12期1744-1750,共7页Journal of Northeastern University(Natural Science)

基　　金：国防技术基础项目(JSZL2020208B001)。

摘　　要：液压设备服役环境复杂,常面临强振动、冲击等极端条件,这些因素与结构相关不确定性参数耦合极易引起溢流阀调定压力波动从而造成设备工作异常.考虑环境振动及不确定性因素的影响,提出了一种直动式溢流阀压力波动失效的可靠性分析模型.通过建立振动环境下溢流阀的动力学模型实现溢流阀动态特性分析,并以其调定压力波动偏差是否超过标准规定值为判别条件,建立溢流阀压力波动失效的极限状态方程;进一步地使用Kriging模型进行可靠性灵敏度分析以获取各参数对压力波动失效现象的贡献程度.结果表明:振动频率对可靠性的影响最为显著,阀芯质量和振动幅度次之,受控腔容积和敏感腔容积影响最小.研究结果可为振动环境下溢流阀发生压力波动失效行为的调控提供理论参考.Hydraulic equipment commonly is operated under complex conditions,characterized by adverse factors such as intense vibration and impact.These factors,combined with the uncertainty of structural parameters,can easily lead to pressure fluctuations in relief valves,potentially resulting in equipment failure.To address this issue,a reliability analysis model for the pressure fluctuation failure of direct-acting relief valves is presented,considering the influence of environmental vibration and uncertainty factors.A dynamic model for the relief valve under environmental vibration is developed,and then its corresponding dynamic characteristics are analyzed.Moreover,based on the dynamic characteristics analysis of the relief valve and the released value of the national standard,a limit-state function for pressure fluctuation failure is established.Furthermore,the reliability sensitivity analysis is performed using the Kriging model to evaluate the contribution of each parameter to the occurrence of pressure fluctuation failure.The results indicate that the vibration frequency has the most significant impact on reliability,followed by the spool mass and vibration amplitude,while the controlled chamber volume and sensitive chamber volume show a minimal contribution.The research results can provide a theoretical basis for regulating the pressure fluctuation failure of relief valves under environmental vibration.

关 键 词：溢流阀 振动 压力波动 KRIGING模型 可靠性灵敏度 

分 类 号：TB114.3[理学—概率论与数理统计]