针对气囊隔振器爆破压力参数所需试验工作量较大且成本较高的问题，以某型JYQN气囊隔振器为例，建立气囊隔振器有限元模型，并分别得出气囊承载特性曲线和帘线拉伸强力特性曲线。对比承载特性试验曲线结果表明，仿真模型精度较好。通过Weibull分布对芳纶帘线断裂强力试验数据进行分散性拟合，将帘线断裂强力期望值代入帘线拉伸特性曲线，得到气囊隔振器预测爆破压力。通过气囊隔振器爆破压力试验验证预测结果的精度，结果表明，结合帘线拉伸特性曲线和帘线断裂强力建立的气囊隔振器爆破压力预测方法精度较高，该方法可用于JYQN系列气囊隔振器爆破压力的预测。
To solve the problem of large test workload and high cost required by blasting pressure parameters of air bag vibration isolator, the finite element model of a certain JYQN air bag vibration isolator is established, and the load characteristic curve of the air bag and the tensile strength curve of the cord are set up respectively. By comparing the test results of load bearing characteristics, the simulation model has good precision. According to Weibull distribution, the test data of breaking strength of aromatic polyamide cord is fitted with dispersion. By bringing the expected strength of cord fracture into the cord stretch characteristic curve, the air spring vibration isolator’s predicted blasting pressure is calculated. The precision of prediction results is verified by the bursting pressure test of the air spring vibration isolator, and the results show that the prediction method of air spring vibration isolator’s bursting pressure is established by combining the stretching characteristic curve of the curtain line and the strength of the curtain line fracture has a higher accuracy, which can be used to predict the bursting pressure of the JYQN series air spring vibration isolator.
2020,42(7): 25-29 收稿日期：2018-11-20
DOI：10.3404/j.issn.1672-7649.2020.07.005
分类号：TB535
作者简介：刘健(1994-),硕士研究生,助理工程师,研究方向为减震降噪元器件寿命预测评估
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