减振器阀片变形求解方法研究  

Research on solving method of damper valve deformation

作　　者：林礼恒 杨礼康 于海涛 徐泽钧 LIN Liheng;YANG Likang;YU Haitao;XU Zejun(School of Mechanical and Energy Engineering,Zhejiang University ofScience and Technology,Hangzhou 310023,Zhejiang,China)

机构地区：[1]浙江科技学院机械与能源工程学院,杭州310023

出　　处：《浙江科技学院学报》2021年第1期76-84,共9页Journal of Zhejiang University of Science and Technology

基　　金：国家自然科学基金项目(51175474)。

摘　　要：求解阀片变形的解析解是减振器数学建模的关键环节之一,而目前小挠度法与大挠度法在计算环形阀片变形量上均存在一定的误差,且仅适用部分工况。对此,本研究采用微梁元法将受均布载荷阀片视为一段微梁元来求解其变形挠曲方程。分别运用微梁元法、大挠度法、小挠度法来计算阀片变形,并将结果与ANSYS有限元仿真结果做误差对比,发现微梁元法所计算的结果与有限元法所计算的结果的误差仅在3.56%以内。为了进一步验证微梁元法的精确性,利用阀片变形对减振器阻尼力的影响,以Fox型减振器为试验原型建立减振器Simulink仿真模型,将大挠度法、小挠度法、微梁元法所计算的阀片变形值代入减振器仿真模型并计算阻尼力,并将仿真结果与试验结果做误差对比,发现微梁元法所计算的阻尼力与试验结果的误差随外部激励速度的增加而减小,当激励速度为0.5 m/s时微梁元法与试验结果的误差仅在160 N以内,而大挠度法、小挠度法所计算的阻尼力与试验结果的误差均在548 N以上。上述结果表明微梁元法可以准确计算受均布载荷减振器环形阀片的变形量,能满足实际工程中的计算需求。It is one of the key links in the mathematical modeling of shock absorber to solve the analytic solution of valve plate deformation.At present,both small deflection method and large deflection method have errors in calculating the deformation of annular valve plate,and they are only applicable to some working conditions.In this study,the valve plate subjected to uniform load is regarded as a micro beam element to analyze its deflection equation,namely micro beam element method.The micro beam element method,large deflection method and small deflection method are used to calculate the deformation of valve plate.The error between the results and ANSYS finite element simulation results is compared.It is found that the error between the results of micro beam element method and finite element method is only less than 3.56%.In order to further verify the accuracy of the micro beam element method,using the influence of valve deformation on the damping force of the shock absorber,taking Fox shock absorber as the experimental prototype,the Simulink simulation model of the shock absorber is established.The valve plate deformation values calculated by the large deflection method,small deflection method and micro beam element method are substituted into the simulation model of the shock absorber,and the damping force is calculated.It is found that the error between the damping force calculated by the micro beam element method and the test results decreases with the increase of the external excitation speed.When the excitation speed is 0.5 m/s,the error between the micro beam element method and the test results is less than 160 N,while the error between the damping force calculated by the large deflection method and the small deflection method and the test results is more than 548 N.The results show that the micro beam element method can accurately calculate the deformation of the annular valve plate of the shock absorber under uniform load,and meet the calculation requirements of practical engineering.

关 键 词：减振器 节流阀片 挠度变形 微梁元法变形 

分 类 号：U461.6[机械工程—车辆工程]