Research on Mounting Life of Subway Supports Based on  Damage Association Editing Method

doi:10.3969/j.issn.1004-132X.2021.04.011

Abstract

Abstract: A method for compiling the load spectrum of aluminum alloy welding seams was proposed by taking the antenna mounting bases of subway bottom frame as the research objects. The acceleration parameters were selected based on the theory of multi-channel damage association editing, and the accelerating excitation spectrum was constructed under the condition of the most consistent preset damage and pseudo damage. The acceleration effectiveness is obvious and the error of each basic characteristic parameter may be controlled within 5% by analyzing the time-domain and frequency-domain characteristics of the target spectrum. The simulation results show that the fatigue life error is within 10% and the reduced efficiency is good by finite element model and the method of quasi-static superposition and uniaxial response,which verified the rationality of the method. The data of bench simulation long life tests show that this method may save more than 40% of test time and the error can be controlled within 15% after using the prepared load spectrum.This method may be used as a reference for compiling the load spectrum of other equipment.

Key words: time-dependent damage editing, load spectrum compilation, aluminium alloy weld, simulated long life test

摘要： 以地铁底架天线安装座为研究对象，提出一种铝合金焊缝载荷谱编制方法。基于多通道损伤关联编辑理论选定加速参数，构建预设损伤与伪损伤最相符的加速激励谱。分析目标谱的时域与频域特性发现，损伤关联编辑法加速效果明显且各项基本特性参数误差可控制在5%以内。建立有限元模型，分别采用准静态叠加与单轴谐响应方法计算累积损伤，仿真结果表明载荷谱缩减前后焊缝疲劳寿命误差在10%以内且加速效率高，验证了该载荷谱编制方法的合理性。台架模拟长寿命试验数据表明，使用编制过的载荷谱后，试验时间可缩短40%以上，焊缝疲劳损伤误差可控制在15%以内。该方法可为车辆其他设备载荷谱编制提供参考。

关键词: 时间关联损伤编辑法, 载荷谱编制, 铝合金焊缝, 模拟长寿命试验

CLC Number:

U270.38

CHEN Kuanyu, YANG Guangwu, XIAO Shoune, WANG Jujin.

Research on Mounting Life of Subway Supports Based on Damage Association Editing Method

[J]. China Mechanical Engineering, DOI: 10.3969/j.issn.1004-132X.2021.04.011.

陈宽裕, 阳光武, 肖守讷, 王举金. [车辆工程与测控]基于损伤关联编辑法的地铁支架安装座寿命研究[J]. 中国机械工程, DOI: 10.3969/j.issn.1004-132X.2021.04.011.

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