管道力学分析中阀门刚度计算分析研究

Calculation and Analysis of Valve Stiffness in Pipeline Mechanics Analysis

目的得到理想的阀门外径和壁厚数据。方法通过振动力学,推导出频率与阀门刚度的关系,并采用Matlab软件求解方程组,得到阀体和阀杆各自刚度,进一步分析得到管道计算中所需要的外径和壁厚。结果经过工程实例验证,对于柔性阀门,理论计算与SYSPIPE管道应力分析软件得到的结果误差较小。结论将管道中的柔性阀门的振动简化为两自由度k-m振动模型是合理的,理论计算结果较为理想,可应用于工程分析中。

Objective To get the ideal outer diameter and wall thickness of valve.Methods This paper derived the relationship between frequency and valve stiffness through vibration mechanics,and used Matlab software to solve the equations to obtain the stiffness of the valve body and valve stem.Further analysis was carried out to obtain outer diameter and wall thickness in the pipeline calculation.Results After verification of engineering examples,the results obtained by the theoretical calculation of the flexible valve and the SYSPIPE pipeline stress analysis software had a small error.Conclusion It is reasonable to simplify the vibration of the flexible valve in the pipeline to a two-degree-of-freedom k-m vibration model,and the theoretical calculation result is ideal and can be applied to engineering analysis.