基于FDS的CI柜体随机振动加速试验方法

目的 在实验室内更加真实地模拟牵引变流器(CI)柜体的超高斯振动环境.方法 采用疲劳损伤谱(FDS)的等效疲劳损伤原则,基于超高斯信号对该柜体进行振动试验加速方法的研究.提出疲劳载荷谱的概念及其计算方法,将采集的平稳超高斯加速度信号,基于时域的方法计算其FDS,进而转换成用于振动台试验的加速度功率谱密度,对CI柜体进行...

Random Vibration Acceleration Test Method of CI Cabinet Based on FDS

In order to more realistically simulate the super-Gaussian vibration environment of the traction converter (CI) cabinet in the laboratory. Based on the equivalent fatigue damage principle of fatigue damage spectrum (FDS), the acceleration method of vibration test for the cabinet was studied based on super-Gaussian signal. The concept of fatigue load spectrum and its calculation method were proposed, and then the FDS of the collected stationary super-Gaussian acceleration signal was calculated based on the time domain method. Then it was converted into the acceleration power spectral density used for the shaking table test, and the random vibration acceleration test was performed on the CI cabinet. On the basis of consistent with the original damage equivalent, the vibration test on the CI cabinet was completed without any fatigue failure. Compared with the traditional Gaussian vibration test, although the same accelerated test time is selected, the test method can more accurately reflect the super-Gaussian vibration environment borne by the CI cabinet, and further accurately test the durability of the product.