车辆—减速带—楼板耦合振动效应及减振机理

发布时间：2018-04-09 06:17

本文选题：车辆荷载　切入点：舒适度　出处：《哈尔滨工业大学》2014年硕士论文

【摘要】：大跨楼板的舒适度是目前结构设计中普遍关心的问题。一般主要针对人行荷载、机械设备荷载进行楼板舒适度验算，很少考虑车辆荷载冲击作用对楼板振动的影响。车辆在经过减速带时会对楼板产生较大的冲击作用，真实的楼板振动响应过程反映了车辆、减速装置及结构相互的耦合作用。本文针对车辆通过减速带引起的楼板振动问题，建立了能够反映车辆与减速带和楼板相互作用的车辆-减速带-结构一体化模型，实现了车辆通过减速带及与结构相互作用的真实过程模拟，探讨了车辆振动与结构振动之间的耦合作用对结构响应的影响。为避免车辆与楼板产生共振，基于车辆-结构-减速带一体化模型，研究了结构参数、车辆参数以及减速带参数对车辆荷载的影响，并在此基础上分析了车辆荷载的频率特性，给出了车辆荷载的频率分布范围。综合车辆荷载的时域及频域分析，为考虑车辆荷载下的楼板舒适度计算提供了设计依据。针对楼板振动过大问题，提出了一种减小车辆冲击作用的减振带，并在此基础上对减振带进行了参数分析；基于车辆-减振带-结构一体化模型，验证了减振带的减振效果；分别测试了车辆经过减振带、减速带下结构的加速度响应，验证了减振带具有较好的减振效果。
[Abstract]:The comfort degree of long-span floor is a common concern in structural design at present.Generally, the comfort degree of floor is checked according to pedestrian load and mechanical load, and the impact of vehicle load on floor vibration is seldom considered.When the vehicle passes through the deceleration belt, it will have a great impact on the floor slab. The real vibration response process of the floor slab reflects the coupling effect of the vehicle, the deceleration device and the structure.In this paper, an integrated model of vehicle-speed reducer and floor structure is established, which can reflect the interaction between vehicle and reducer and floor slab, aiming at the vibration of floor slab caused by vehicle passing through speed reducer.The real process simulation of the vehicle passing through the reducer and the interaction with the structure is realized, and the influence of the coupling between the vehicle vibration and the structural vibration on the structural response is discussed.In order to avoid the resonance between vehicle and floor, the influence of structural parameters, vehicle parameters and reducer parameters on vehicle load is studied based on the integrated model of vehicle-structure-deceleration, and the frequency characteristics of vehicle load are analyzed.The frequency distribution range of vehicle load is given.The analysis of time domain and frequency domain of vehicle load provides a design basis for the calculation of floor comfort under vehicle load.Aiming at the problem of excessive vibration of floor slab, a kind of damping band is proposed to reduce the impact of vehicle, and on the basis of this, the parameter analysis of the belt is carried out, and the damping effect of the belt is verified based on the integrated model of vehicle-vibration belt and structure.The acceleration response of the structure under the damping belt is tested respectively, and it is verified that the damping band has a good damping effect.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU312.1;U461.5

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