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本文分析了铺筑在Westergaard基础上的路面对以稳定车速行驶在随机波形路面上载荷压力的响应,路面波形功率谱是根据法国的实验所作记录得出的。由振动轴的特性,得出激扰载荷的功率谱。然后我们分析了随机弯曲振动,从而求得路面的均方位移,并对随机及谐和两种路面波形所得结果作了比较。我们注意到,对于铺筑在硬橡皮基础上的路面两者弯沉的均值是接近的。而另一方面对于铺筑在软橡皮基础上的路面,随机激扰所引起的位移幅值较谐和激扰所引起者大的多。因此,发现对各种类型的隔振基础,正弦路面波形不能反映道路的特性。事实上,真正的特性取决于路面波形功率谱和车辆的性质。
This paper analyzes the pavement response based on the Westergaard pavement to the load pressure at a steady speed with a random waveform. The power spectrum of the pavement waveform is recorded based on experiments in France. From the vibration axis characteristics, the power spectrum of the disturbing load is obtained. Then we analyze the random bending vibration to get the mean square displacement of the pavement, and compare the results of the random and harmonic pavement waveforms. We noticed that the mean value of deflection for both paved roads based on hard rubber is close. On the other hand, paving the road on the basis of soft rubber, random excitation caused by the displacement amplitude caused by the harmonics and much larger. Therefore, it has been found that for various types of vibration isolation foundation, the sinusoidal pavement waveform does not reflect the characteristics of the road. In fact, the real characteristics depend on the pavement waveform power spectrum and the nature of the vehicle.