基于颗粒阻尼的高速列车动力包构架减振研究

Research on Vibration Reduction of Power Pack Frame of High-speed Train Based on Particle Damping

为研究基于颗粒阻尼技术的高速列车动力包减振方法,以某型动力包为原型,搭建其1∶3缩比框架结构模型综合试验台,并结合有限元方法及模态测试试验,来验证框架结构模型的有效性。设计试验优化颗粒阻尼器分布及填充率、阻尼颗粒粒径及材质。在高速列车动力包构架上进行实车试验,试验数据表明,动力包构架在垂向上的振动减少55.77%,在其他工况下,减振效果为51.83%,文中的研究为颗粒阻尼在高速动车组上的应用提供了设计依据。

In order to study the damping method of high-speed train power pack based on particle damping technology,a 1∶3 scale frame structure model test-bed is built with a power pack as the prototype,and the effectiveness of the frame structure model is verified by the finite element method and modal test experiment.Design experiments to optimize the distribution and filling rate of particle damper,particle size and material of damping particles,and carry out real vehicle experiments on the power pack frame of high-speed train.The experimental data show that the vibration of the power pack frame in the vertical direction is reduced by 55.77%,and in other working conditions,the damping effect is 51.83%.This study provides the design basis for the application of particle damping in highspeed train.