转辙机振动加速度的试验研究

TESTING RESEARCH ON VIBRANT ACCELERATION OF POINT MACHINE

为了评价、改进现有转辙机对工作环境振动的适应性 ,并为研制新型转辙机提供环境振动的参数 ,以适应火车高速重载的需要。本文对牵引不同道岔、不同列车通过时的几种转辙机实际振动加速度进行了测试 ,从时域和频域进行了统计、计算和分析 ,给出测试和分析结果。结果表明 ,列车通过时转辙机竖向振动加速度最大 ,最大值范围为 11～38g ,转辙机振动加速度主频在 40 0～ 80 0Hz之间。本文还建立了轮轨—转辙机的简化动力学模型 ,定性分析了转辙机安装对振动加速度的影响 ,并描述了转辙机的振型。文中测试分析得出的结果、结论和建议 ,对于评价和提高转辙机对环境振动的适应能力 。

In order to evaluate and improve the adaptability of existing point machines under vibration of working environment, and provide vibrant parameter of environment for developing new point machines, and satisfy train requirement of high speed and heavy load, it has been tested and analyzed that vibration acceleration of several different point machines which transform different points, when different type trains pass through. Statistics, computation and analysis of testing data are completed respectively in time domain and frequency domain, also testing and analyzing results are given out in this paper. The results show that vibrant acceleration of point machine in vertical direction is maximal and the maximal value is in the range of 11～38 g , and the vibrant main frequency is in the range of 400～ 800 Hz when trains pass through. Dynamic model of wheel rail/point machine is set up, and the influence of installation of point machine on the vibrant acceleration is analyzed qualitatively, also main vibrant mode shapes of point machine are illustrated. The result, conclusion and suggestion obtained in this paper have some reference values for evaluating and advancing the adaptive ability of point machines under vibration of working environment, also for improving on design and installation of point machines.