基于响应面法的摊铺机压实系统参数优化

Parameter optimization for compacting system of asphalt paver based on response surface method

对摊铺机样机的试验研究发现沿熨平板长度方向振幅差值较大。为了改善熨平板振幅的不均匀性,将熨平板作为柔性体,建立了摊铺机压实系统的刚柔混合动力学模型;选取振捣梁质量以及振动器偏心轴的质量和偏心距的乘积为设计变量,以熨平板上节点振幅差为优化目标,通过基于正交设计的响应面方法,借助数值分析,建立优化变量和优化目标间的函数关系,采用遗传算法进行优化。优化后熨平板上节点振幅差减少了83%,各节点振幅均匀性大大改善。

An experimental research on a paver prototype shows that the maximal vibration amplitude along the screed length is almost two times greater than the minimal.In order to decrease the amplitude difference in screed,the screed was thought as a flexible body and a coupled rigid and flexible model for compacting system of asphalt concrete paver was established.The mass of tampers and the product of mass and eccentric distance of the eccentric shaft were selected as optimization parameters,and the minimal amplitude difference in screed was taken as the target.A functional expression with respect to the target and the optimization parameters was built through response surface method based on orthogonal design and numerical calculation.The optimization results show that the amplitude difference in screed decreases by 83% after optimization and the nonuniformity of amplitude in asphalt paver screed is improved effectively.