1.同济大学 上海市轨道交通结构耐久与系统安全重点实验室，上海 201804;2.同济大学 道路与交通工程教育部 重点实验室，上海 201804;3.大功率交流传动电力机车系统集成国家重点实验室，株洲 412000
1.Shanghai Key Laboratory of Rail Infrastructure Durability and System Safety, Tongji University, Shanghai 201804, China;2.Key Laboratory of Road and Traific Engineering, Ministry of Education, Tongji University, Shanghai 201804, China;3.State Key Laboratory of Heavy Duty AC Drive Electric Locomotive Systems Integration, Zhuzhou 412000，China
The modal superposition method was used to obtain the admittance characteristics of damped wheels. Based on the established prediction model of wheel/rail rolling noise and taking the surface roughness of wheels and rails as the excitation, the influence of the position and thickness of a damping layer on vibration and sound radiation characteristics of damped wheels was analyzed. Firstly, a three-dimensional solid finite element model of damped wheels was established, and the Block Lanczos method was used to calculate the modal characteristics of wheels. Secondly, the frequency response function of wheels under unit load was obtained by the modal superposition method. Then, the frequency domain vibration characteristics of wheels under the excitation of roughness spectrum were obtained by the virtual excitation method. Finally, the frequency domain characteristics of acoustic radiation were obtained by an analytic method based on the dynamic responses. The results showed that the damping layer laid on the wheel web has no obvious effect on vibration and noise suppressions of the wheel below 1000Hz, but performs good function above 1600Hz. The noise reduction by the damping layer laid on both sides of the web of the wheel is better than that by the damping layer only laid on one side. The thicker the thickness of the damping layer is, the more obvious the noise reduction is.
钱鼎玮,杨新文,刘晓波,马晓云.轨道车辆车轮辐板阻尼层对其降噪效果的影响分析*[J].动力学与控制学报,2020,18(3):44~50; Qian Dingwei, Yang Xinwen, Liu Xiaobo, Ma Xiaoyun. EFFECT OF WEB DAMPING LAYER ON NOISE REDUCTIONOF RAIL VEHICLE WHEEL*[J]. Journal of Dynamics and Control,2020,18(3):44-50.复制