道路不平顺激励下车辆运输非线性包装系统动力学响应

目的研究运输车辆-非线性包装系统耦合系统在路面脉冲激励下的隔振特性。方法整体考虑路面-运载工具-缓冲包装材料-物品之间耦合的非线性振动传递模型,建立基于二分之一系统的五自由度路面脉冲激励下车辆-非线性包装系统运动分析理论模型,推导得到系统动力学方程并求解。依据结果比较考虑车辆-非线性包装系统耦合及不考虑两者耦合对运输包装件的影响,从而得知考虑车辆-非线性包装件系统耦合系统下包装件最大竖向位移是不考虑两者耦合情况下的1.25倍左右,并分别对隔振材料非线性因素及路面不平顺因素对包装件的影响进行分析。结果在车辆运输过程中,隔振材料的非线性因素及路面不平顺因素对包装件系统的响应会产生一定的影响。结论对于精确进行被动隔振设计和隔振效果评价具有积极意义。

Dynamic Response of Transport Nonlinear Packaging Systems to Uneven Road Excitation

Objective To investigate the vibration isolation characteristics of transport vehicle-nonlinear packaging system coupled under pulsed excitation of the road. Methods Comprehensively considering the nonlinear vibration transfer model on the road-vehicles-cushioning packing material-goods coupled system, a 5-DOF motion analysis theoretical model based on a half system was established for the vehicle-nonlinear packaging system under pulsed excitation of the road, and dynamic equation was derived and solved. According to the results, the effects of considering and not considering the coupling of the vehicle -nonlinear packaging system were compared. It was found that the maximum vertical displacement of the package under the coupled system of vehicle-nonlinear packaging system was about 1. 25 times as high as that of the system not considering the coupling, and the effects of nonlinear factors of isolation material and roughness of the road on the package were also analyzed. Results The nonlinear factors of isolation material and roughness of the road had some impact on the response of the package system during vehicle transport. Conclusion The results of this paper are very useful for the accurate design and effect analysis of vibration isolators.