[1]潘公宇,徐 锐,杨晓峰.基于整车路面谱的副车架开裂台架试验及仿真[J].郑州大学学报(工学版),2024,45(01):29-33.[doi:10.13705/j.issn.1671-6833.2023.04.008]
　PAN Gongyu,XU Rui,YANG Xiaofeng.Sub-frame Crack Rig Testing and Simulation Analysis Based on Full-vehicle Rough Road Spectrum[J].Journal of Zhengzhou University (Engineering Science),2024,45(01):29-33.[doi:10.13705/j.issn.1671-6833.2023.04.008]
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基于整车路面谱的副车架开裂台架试验及仿真()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
45
期数:
2024年01期
页码:
29-33
栏目:
出版日期:
2024-01-19

文章信息/Info

Title:
Sub-frame Crack Rig Testing and Simulation Analysis Based on Full-vehicle Rough Road Spectrum
作者:
潘公宇;  徐 锐;  杨晓峰
1. 江苏大学 汽车与交通工程学院,江苏 镇江 212013; 2. 恒大新能源汽车全球研究总院,上海 201620
Author(s):
PAN Gongyu;  XU Rui;  YANG Xiaofeng
1. School of Automobile and Traffic Engineering,Jiangsu University, Zhenjiang 212013,China; 2. Evergrande New Energy Automotive R&D Institute Global Headquarters, Shanghai 201620, China
关键词:
台架试验;  耐久;  虚拟迭代;  疲劳仿真;  相关性
Keywords:
rig test;  durability;  virtual iteration;  fatigue simulation;  correlation
DOI:
10.13705/j.issn.1671-6833.2023.04.008
文献标志码:
A
摘要:
针对前悬架稳定杆与副车架连接处在整车试验场耐久测试过程中出现的疲劳破坏问题,通过对稳定杆进 行贴片标定,获得了试验场环境下稳定杆的连杆力和稳定杆扭转相对位移的强化耐久路谱,设计搭建了稳定杆副 车架系统的物理台架,并按照耐久性规范进行了台架试验。 试验结果表明:该台架试验装置能良好地再现整车耐 久路试下的断裂位置,疲劳寿命相对于整车耐久路试的疲劳寿命偏差仅为 2. 5%。 在此基础上,建立了稳定杆与副 车架多体的仿真模型,设定了与系统试验台架相同的约束边界,通过虚拟迭代的方法及准静态有限元疲劳寿命分 析法对系统进行了仿真分析。 仿真得到稳定杆连杆力和稳定杆扭转相对位移信号,与测试结果进行对比分析可以 看出,时域下相位和幅值重合度良好,频域下的 PSD 谱重合度较高,穿级计数载荷统计基本一致,载荷相对损伤均 在 1 附近,相关风险位置处的仿真疲劳寿命与整车耐久试验寿命偏差比为 6. 25%,获得了较高精度的风险位置载 荷,实现了耐久风险位置的复现。 最后,基于仿真模型对副车架风险位置处进行了结构优化设计,改进后的方案顺 利通过了后续的台架试验和整车耐久路试
Abstract:
The study was conducted to examine the durability issue occurred in front stabilizer bar bracket connected to sub-frame in full vehicle testing. Firstly, stabilizer bar system was plastered with strain gauges and calibrated, and drop link force and stabilizer bar twist displacement acquired on proving ground, sub-frame with stabilizer bar system physical test rig was designed and built, and rig tests in accordance with durability specifications were conducted. The test results showed that built physical test rig could greatly reappear crack location in full vehicle testing, the fatigue life of the physical bench had a deviation of 2. 5% compared to full vehicle testing. Based on this, a stabilizer bar and sub-frame multi-body virtual model was built with the same constraint boundary and the same loading method of the physical test rig. Then CAE fatigue simulation was used through quasi-static finite element fatigue life analysis method to reappear related area risk. The simulation results showed that phase and amplitude had a good coincidence in time domain, the PSD spectrum also had a good accuracy in frequency domain, the relative damage was almost closed to 1 with the comparison between the simulation and test in droplink force and stabilizer bar relative displacement. The deviation between the simulated fatigue life at the relevant risk position and the test life of the full vehicle was 6. 25%. A higher accuracy risk position load was obtained, and the reappearance of durability risk position was achieved. Finally, based on simulation fatigue load, the optimization risk structure was evaluated. Optimized proposal eventually passed the test rig and full vehicle testing successfully.
更新日期/Last Update: 2024-01-23