噪声与振动控制2018，Vol.38Issue(3)：141-145,156,6.DOI:10.3969/j.issn.1006-1355.2018.03.027
基于动柔度法的轨道高架桥橡胶垫减振性能研究
Study on Vibration Reduction Performance of Rubber Pads of Track Viaducts based on Dynamic Compliance Method
摘要
Abstract
In order to study the vibration reduction effect of rubber pads under cement or asphalt layers of viaducts, the vertical dynamic model of vehicle-track-bridge coupling is established based on dynamic compliance method. Only 1/8 of the wheel-pair system of the vehicle and the primary suspension are considered. The rails are regarded as infinitely long Timoshenko beams and the bridge is simplified as a simply supported Euler beam. The fastener system, cement or asphalt layer and the rubber pads are simplified as a linear spring-damping system. The wheel-rail contact force is calculated in frequency domain using the wheel dynamic compliance, rail dynamic compliance and linear contact compliance. This contact force is then applied to the rail to calculate the dynamic responses of the rail, track sleeper panels and the bridge. The vibration reduction effect of the rubber pads is evaluated by the vibration acceleration level, the acceleration level insertion loss and the Z-level insertion loss. The results show that the vibration response of the rail is slightly increased after the rubber pads are installed and the insertion loss of the Z-level is-0.81 dB;the vibration response of the track sleeper panel increases significantly and the Z-level insertion loss is-10.3 dB;the vibration response of the bridge decreases obviously and the Z-level insertion loss is 15.6 dB. The calculation results show that the rubber pads can effectively reduce the vibration response of the bridge structure. The relevant research provides a reference for vibration and noise reduction of bridges.关键词
振动与波/高架桥/橡胶减振垫/动柔度法/振动加速度级/插入损失Key words
vibration and wave/viaduct/rubber absorber pad/dynamic compliance method/vibration acceleration level/insertion loss分类
交通工程引用本文复制引用
宋瑞,刘林芽,徐斌,刘全民,秦佳良..基于动柔度法的轨道高架桥橡胶垫减振性能研究[J].噪声与振动控制,2018,38(3):141-145,156,6.基金项目
国家自然科学基金资助项目(51578238 （）
51608201) （）
