桥面不平度随机激励模型

桥面不平度是影响车辆桥梁振动的主要因素,定量地研究桥面的凹凸不平对车辆桥辆振动的影响程度,关键是要能够建立一个能正确模拟实际桥面状况的桥面不平度模型.指出了传统的用周期性函数表示不平度模型的缺点,引入随机不平度理念,建立了一种用路面功率谱函数表示桥面不平度的方法,并建立了桥面不平度随机激励时域模型.通过对比分析发现,建立的桥面不平度模型是可信的,从而提供了一种在缺少实测数据时如何通过计算机模拟获得桥面不平度仿真数据的方法.

Random activation model of random surface roughness of bridge

The surface roughness of bridge is one of the main factors which affect the vehicle-bridge vibration. In order to know how the bridge surface roughness affects the vehicle-bridge vibration, the key is to build the model which can accurately simulate the real surface of the bridge. Disadvantages of conventional model were pointed out and a new method to set up the model of random surface roughness of bridge was offered. The new model is based on stochastic roughness idea and expressed by the power spectrum function of road surface. Then the time domain model of bridge surface roughness stochastic activation was established. The model was verified by comparison analysis. A computer simulation approach to obtain the simulative data of surface roughness on a bridge without any measured data was submitted.