路基振动压实的虚拟样机仿真分析

Virtual Prototype Simulation Analysis of Subgrade Vibrating Compaction

文中采用Solidworks及ADAMS软件,提出路基振动压实的虚拟样机仿真流程,通过与试验结果的对比,证明所提出仿真方法的准确性。基于已验证的仿真方法开展变参分析,揭示振动压路机振动加速度、土壤刚度、土壤阻尼,以及智能压实指标Evib间的关系。结果表明,随着土体刚度增加,振动轮加速度量值逐渐增大、离散性逐渐减小,而土体阻尼变化对振动轮加速度影响较为有限;拟合了Evib与加速度均值的计算式,相关系数达0.96,可便捷、快速地计算Evib值。

The virtual prototype simulation method of subgrade vibrating compaction is proposed by using Solidworks and ADAMS.Subsequently,the accuracy of the proposed method is proved by comparison with the test results.Then,based on the verified simulation method,parameter analysis is carried out to reveal the relations among vibration acceleration,soil stiffness,soil damping,and intelligent compaction index E vib.The results show that as the soil stiffness goes up,the vibration acceleration increases and the discreteness decreases gradually,while the influence of soil damping on the acceleration of the vibrating wheel is limited.The relations between E vib and mean acceleration are obtained by regression fitting with a correlation coefficient of 0.96,which offers a convenient way to calculate E vib.