摘要
采用三自由度车辆模型 ,考虑上桥和下桥两个方向 ,建立了对车辆通过路桥过渡段进行动力响应分析所需的振动方程和初始条件 ,并提出以人的最大瞬态振动值作为搭板容许坡差确定的控制指标。在动力响应分析的基础上 ,详细分析了行进方向、车速、搭板坡差、搭板长度、载重和桥面沉降坡差等参数对人的最大瞬态振动值的影响 ,得到的一系列结论对于在各种不同的情况下准确确定搭板容许坡差具有重要的价值。
Simplifying the vehicle as a three degree freedom system, taking into account two different movement directions, the vibration equations and the initial condition in dynamic response analysis for vehicle's passing the approach slab were developed. The maximum transient vibration value was selected as the controlling index for determining the differential slope of the approach slab based on the dynamic response analysis. The influence factors on the maximum transient vibration value such as movement direction, speed, differential slope and length of approach slab and weight of the load, were studied.
出处
《长安大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2003年第3期11-14,59,共5页
Journal of Chang’an University(Natural Science Edition)
关键词
路桥过渡段
桥头搭板
容许坡差
参数确定
桥头跳车
vehicle bump
bridge approach slab
allowable differential slope
dynamic response
maximum transient vibration value
parameters' influence
