| 张凯,段凯欣,刘瑜瑾.基于六自由度道路模拟技术的座椅加速试验方法[J].装备环境工程,2020,17(10):82-87. ZHANG Kai,DUAN Kai-xin,LIU Yu-jin.Acceleration Test Method of Seats Based on Six-degree-of-freedom Road Simulation Technology[J].Equipment Environmental Engineering,2020,17(10):82-87. |
| 基于六自由度道路模拟技术的座椅加速试验方法 |
| Acceleration Test Method of Seats Based on Six-degree-of-freedom Road Simulation Technology |
| 投稿时间：2019-08-01 修订日期：2019-12-12 |
| DOI：10.7643/issn.1672-9242.2020.10.013 |
| 中文关键词: 六自由度振动试验台 放大幅值 加速试验 危险截面法 损伤 |
| 英文关键词:six-degree-of-freedom test rig amplification amplitude acceleration test dangerous section method damage |
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| 中文摘要: |
| 目的 通过六自由度振动试验台对座椅进行道路模拟加速试验。方法 在整车试验场采集座椅与地板安装位置处六个方向的加速度谱，进行去毛刺、漂移等初步处理后，将加速度谱的幅值放大，得到真实损伤放大后的加速度谱。在六自由度振动试验台上分别采集原始和放大后的加速度谱下相同点位的应变谱，通过危险截面法分别计算出原始和放大后加速度谱下各点的真实损伤。以各点的原始路谱真实损伤值作为横坐标，放大幅值后路谱的真实损伤作为纵坐标，通过曲线拟合将各点拟合出一条直线，直线的斜率即为放大后加速度谱损伤实际放大的倍数，总循环次数得到相应倍数的缩减。结果 通过验证，将路谱幅值放大1~1.2倍左右，总损伤放大1.5~2倍左右，试验时间缩短为原来的1/2~2/3左右。结论 通过该方法在原有的座椅六自由度道路模拟试验的基础上，进一步缩短了试验时间，减少了试验费用。 |
| 英文摘要: |
| The work aims to carry out the road simulation acceleration test of the seat through the six-degree-of-freedom vibration test rig. The acceleration spectra of six directions at the seat and floor installation position were collected in the complete vehicle test field. After preliminary processing such as deburring and drifting, the amplitude of the acceleration spectra was amplified to obtain the acceleration spectra after real damage amplification. Then, the strain spectra of the same point under the original acceleration spectra and the amplified acceleration spectra were collected on the six-degree-of-freedom vibration test rig separately. The real damage of each point under the original acceleration spectra and the amplified acceleration spectra was calculated by the dangerous section method. With the real damage value of the original road spectrum of each point as the abscissa and the real damage of the amplified road spectrum as the ordinate, each point was fitted to a straight line by curve fitting, and the slope of the straight line was the actual amplification multiple of the amplified acceleration spectrum damage, and the total cycle times were reduced by a corresponding multiple. Through verification, when the road spectrum amplitude was amplified about 1~1.2 times and the total damage was amplified about 1.5~2 times, the test time was shortened to about 1/2~2/3 of the original. This method further reduces test cycle and cost based on the original six-degree-of-freedom road simulation test of seats. |
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