列车运行监控装置主机的超高斯加速振动试验研究

Research on Super-Gaussian Accelerated Vibration Test of LKJ Case

目的解决LKJ主机的超高斯振动试验问题。方法基于LKJ主机的实测振动环境数据,提出一种超高斯振动数据归纳方法,并应用该方法归纳出LKJ主机x、y、z向的实测PSD,同时按5.66的加速因子构建出超高斯加速振动试验剖面,其中x、y、z向PSD的RMS分别为3.34、6.28、3.85 m/s^(2),峰度分别为6.48、6.58、6.81,频率范围均为2~350 Hz。最后,采用超高斯加速试验剖面分别对2个LKJ主机进行超高斯振动试验验证。结果试验共激发出7类故障模式,这与特定线路运行LKJ主机现场故障模式高度吻合。结论该试验方法验证了LKJ主机超高斯加速振动试验的有效性。

This research aims to solve the problem of the super-Gaussian vibration test of the LKJ case.Therefore,this pa-per proposes a super-Gaussian vibration data induction method based on the measured vibration environment data of the LKJ case,and uses this method to sum up the x-direction,y-direction and z-direction of the LKJ case measured PSD,and constructed a super-Gaussian accelerated vibration test profile according to an acceleration factor of 5.66,in which the RMS of the x,y,and z-direction PSD are 3.34,6.28,3.85 m/s^(2) respectively,the kurtosis is respectively 6.48,6.58,6.81,and the frequency range is 2~350 Hz.Finally,the super-Gaussian acceleration test profile is used to verify the super-Gaussian vibration test of the two LKJ cases.The test has excited 7 types of failure modes,which are highly consistent with the on-site failure mode of the LKJ case running on a specific line.In conclusion,this test method verifies the effectiveness of the super-Gauss accelerated vibration test of the LKJ case.