摘要
国际平整度指数IRI和路面功率谱密度PSD是评价路面平整度的两大指标,通过理论公式的推导,建立了两大指标的换算关系。在此基础上,给出了基于离散傅立叶逆变换的路面不平度仿真过程,推导得出了基于国际平整度指数IRI的路面不平度仿真过程,并对仿真精度进行了验证。仿真结果表明:利用该方法可以直接通过国际平整度指数IRI对路面不平度进行时域仿真,且仿真精度较高。最后,结合实测高速公路的国际平整度指数IRI对实际路面进行了不平度仿真,得到实际路面的不平度起伏情况。
International Roughness Index （IRI） and Power Spectral Density （PSD） are the two indexes of the road roughness. Through the derivation of the theoretical formulation, then the relation between two indexes is established. Based on this, the method of Fourier reverse transform process is given, the simulation of road roughness is derivated based on IRI, and the verification of the accuracy of the simulation is tested. The results indicate that method can simulate directly the road roughness from IRI, and the accuracy is outstanding. Finally, with the actual IRI data of the highway the roughness of the road is simulated, the actual roughness of the road are obtained.
出处
《公路》
北大核心
2008年第11期155-160,共6页
Highway
基金
国家自然科学基金资助项目
项目编号50678183
