基于疲劳损伤谱的随机振动试验方法在智能电表模拟公路运输中的研究

目的解决传统试验精确度差、仿真程度低的问题,验证智能电表在随机振动过程中的可靠性。方法将基于疲劳损伤谱的等效随机振动试验方法运用到智能电表公路运输振动试验中,首先提出疲劳载荷谱的概念及其获取方法,并对采集的振动数据进行处理,得到用于加速振动试验的功率谱密度,最后验证基于疲劳损伤谱的随机振动试验方法应用于智能电表模拟公路运输方法的可行性及优势。结果使用该方法加速试验前后的累计疲劳损伤误差为6.4%。结论该方法不但能大幅减少试验时间,同时能够节省大量人力、物力资源。

Random Vibration Test Method Based on Fatigue Damage Spectrum in Simulation of Road Transport with Smart Meter

Objective To solve the poor precision and low simulation degree of traditional test and verify the reliability of smart meter in random vibration. Methods In this paper, the equivalent random vibration test method based on fatigue damage spectrum was applied to the smart meter road transportation vibration test. Firstly, the concept of fatigue load spectrum and its acquisition method were proposed. The collected vibration data was processed to obtain the power spectral density used to accelerate the vibration test. Finally, the feasibility and advantages of applying the random vibration test method based on fatigue damage spectrum in simulation of road transport with smart meter were verified.. Results The cumulative fatigue damage error before and after the test is accelerated with this method was 6.4%. Conclusion This method can not only greatly reduce the test time, but also save a lot of manpower and material resources.