基于沟槽橡胶复合结构的高速列车受电弓隔振降噪研究  

Research on Reducing Vibration and Noise of High-speed-train’s PantographBased on Groove Rubber Composite Structure

作　　者：曾昭阳 范红伟 焦映厚[1] 李飞 ZENG Zhao-yang;FAN Hong-wei;JIAO Ying-hou;LI Fei(School of Mechatronics Engineering,Harbin Institute of Technology,Harbin 150001,China)

机构地区：[1]哈尔滨工业大学机电工程学院,哈尔滨150001

出　　处：《科学技术与工程》2020年第17期6908-6915,共8页Science Technology and Engineering

摘　　要：采用沟槽橡胶复合隔振结构降低受电弓振动引起的车厢噪声。高速列车运行中,受电弓与电网接触并产生振动,振动传递至列车车厢后将引起车厢内部噪声。通过对弓网系统进行简化,建立弓网耦合系统的动力学模型,并预测列车在360 km/h车速下受电弓对车厢的激励力频幅特性。计算结果显示,受电弓对车厢的激励幅值随着频率的增加逐渐降低,低频激励力幅值接近200 N,高频激励力幅值在100 N以上。对比沟槽橡胶复合隔振结构、纯橡胶隔振结构及无沟槽橡胶复合隔振结构在30~2000 Hz范围内频幅特性,对比结果显示,沟槽橡胶复合隔振结构在中低频范围内具有更低的响应。借助边界元法,将预估得到的相关激励力频幅设定成输入内容,分析一定观测平面中30~2000 Hz区间中的声压曲线。计算结果显示,沟槽橡胶复合隔振结构能够将车厢内的噪声平均降低约20 dB,具有明显的降噪效果。The groove rubber composite structure can reduce high-speed-train’s pantograph vibration and noise.The pantograph vibrates due to its contact with the power grid,and results in extra noise in the carriage.The pantograph-power grid system was simplified and theoretically modeled.The frequency domain amplitudes of the force applied on the carriage due to the pantograph were predicted by the established model of pantograph-power grid system.The results show that the excitation force of pantograph is nearly 200 N at low frequencies and 100 N at high frequencies.Dynamic action change of grooved rubber integral model composite structure from 30 Hz to 2000 Hz is predicted via FEA and compared with the pure rubber structure and the groove rubber structure.The comparison indicates that the proposed groove rubber composite structure is more suitable for the purpose of reducing vibration and noise of high-speed-train’s pantograph.The vibration and noise of the carriage with and without the groove rubber composite structure is predicted and compared in the range from 30 Hz to 2000 Hz.The prediction indicates that the groove rubber composite structure is effective in reducing the noise in the carriage,as the noise is reduced about 20 dB.

关 键 词：受电弓 隔振结构 隔振 降噪 高速列车 

分 类 号：TM922.6[电气工程—电力电子与电力传动]