磁浮工程道岔梁的TLMD减振技术研究

发布时间：2018-08-11 13:39

【摘要】：为了解磁浮道岔梁的车桥耦合振动机理并进行振动控制,以长沙中低速磁浮工程道岔梁为工程背景,对磁浮工程道岔梁的TLMD减振技术进行研究。首先通过对磁浮道岔梁在磁浮列车激励下的振动响应测试,分析加速度的时程曲线和频率特征,研究其振动机理,确定道岔梁的受控频率;然后采取频率分布式的多重TLMD阻尼减振方案,并利用基于多目标满意度优化方法,对各TLMD进行参数优化;最后在实桥安装TLMD阻尼器后进行实桥测试,对安装阻尼器前、后道岔梁的振动响应进行对比。研究结果表明:磁浮工程道岔梁和磁浮列车的悬浮调整力形成了共振,振动响应剧烈,由于其振动频率明确,可以采用调谐式阻尼器进行控制;采用优化的TLMD阻尼器方案的理论减振效果明显;通过实测对比,安装TLMD阻尼器后,道岔梁的振动基本被抑制,满足日常行车的要求。
[Abstract]:In order to understand the mechanism of vehicle-bridge coupling vibration of maglev switch beam and to control the vibration, the TLMD damping technology of maglev switch beam is studied in Changsha middle and low speed maglev project. Firstly, the vibration response of maglev switch beam under the excitation of maglev train is tested, the time-history curve and frequency characteristic of acceleration are analyzed, the vibration mechanism is studied, and the controlled frequency of switch beam is determined. Then, the frequency distributed multi-multiple TLMD damping scheme is adopted, and the parameters of each TLMD are optimized based on the multi-objective satisfaction optimization method. Finally, after the real bridge is installed with the TLMD damper, the real bridge is tested, and the damper is installed. The vibration response of the rear turnout beam is compared. The results show that the suspension adjustment force of the switch beam and maglev train in maglev engineering is resonant, and the vibration response is strong. Because of its definite vibration frequency, the tuned damper can be used to control it. The theoretical damping effect of the optimized TLMD damper scheme is obvious. After the TLMD damper is installed, the vibration of the switch beam is basically suppressed to meet the requirements of daily driving.
【作者单位】：中铁大桥科学研究院有限公司;桥梁结构健康与安全国家重点实验室;
【分类号】：U441.3

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