基于ANSYS Workbench的一种几何量轨检仪器检测设备模态分析及随机振动模拟分析

ANSYS WorkbenchModal Analysis and Random Vibration Simulation Analysis of a Geometric Rail Inspection Instrument Testing Equipment

随着轨道检测设备的自动化发展,使检测项目的几何参数计量由静态转变为动态,且提高了对检测仪器的要求。由于动态检测引入了振动源,因此即使有隔振措施,也会导致检测仪器产生微小振动,影响检测结果。本文对一种几何量轨检仪器检测设备进行三维建模,采用ANSYS Workbench软件进行模态分析,并对竖直方向上的微小随机振动功率谱密度对测量精度的影响进行研究。结果表明:当加速度功率谱密度为12350(mm/s^(2))^(2)/Hz时(即振动台隔振效果达93.5%),满足该仪器竖直方向上±1mm检测要求。

With the automatic development of track inspection equipment,the measurement of geometric parameters of inspection items has changed from static to dynamic,and the requirements for inspection instruments have been increased.Because the dynamic detection introduces a vibration source,even if there is a vibration isolation meas-ure,it will cause small vibration of the detection instrument and affect the detection result.In this paper,three-dimensional modeling is carried out for a kind of measuring equipment,modal analysis is carried out by ANSYS W orkbench software,and the influence of the power spectrum density of small random vibration in the vertical di-rection on the measuring accuracy is studied.The results show that when the acceleration power spectral density is 12350(mm/s^(2))^(2)/Hz(that is,the vibration isolation ffect of the shaking table reaches 93.5%),the detection requirement of土1mm in the vertical direction of the instrument is satisfied.