Estimation of road roughness near expansion joints

货车悬架弹簧振动是货车通过公路桥梁时，伸缩缝处的路面不平度引起的。此外，货车的弹簧振动和桥梁的振动会传递给桥梁周围的房屋。为了减小这些振动，本文研究了货车伸缩节周围路面不平度与悬架弹簧振动的关系。此外，本研究还提出了一种新的检测长波影响货车路面不平度的评价方法。针对引起振动问题的各种粗糙度，验证了该方法的有效性。

The suspension spring vibration of a truck is generated by the road roughness at the expansion joints, when the truck run a highway bridge. Moreover, the spring vibration of a truck and bridge vibration transmits to the houses around the bridge. In this study, in order to reduce these vibrations, the relation of the road roughness round the expansion joints and the suspension spring vibration of a truck were investigated. Also, this study proposed a new evaluation method for detecting the road roughness with the long wavelength affecting trucks. The validity of the method was verified for the various roughnesses which had caused the vibration problem.