机械变速器齿轮敲击现象建模及其影响因素

Modelling of Manual Transmission Gear Rattle Phenomenon and Its Impact Factors

摘要:

利用车辆基本参数和实车传动系统各部件的等效转动惯量、扭转刚度和阻尼扭转特性参数，建立了包含LuGre轮胎模型在内的传动系统非线性扭转振动和车辆纵向平移运动耦合模型.利用耦合模型再现了车辆处于一挡加速工况下各非承载齿轮对的敲击情况，并分析了各非承载齿轮对敲击强度的主要影响因素.结果表明，合理设计各挡位齿轮对齿侧间隙和等效转动惯量大小可有效抑制机械变速器齿轮敲击现象.

Abstract:

Based on basic parameters of vehicle and rotational parameters of real driveline system components, e.g. torsional inertia, stiffness and damping, the coupling model of nonlinear torsional vibration of vehicle powertrain and longitudinal translation was established. With the coupling model, each unloaded gear pair rattling phenomenon was reproduced when the vehicle in gear one was accelerating. Then, gear rattle sensitivity was analyzed for different impact factors. It is shown that appropriate gear backlash and torsional inertia could inhibit the gear rattle phenomenon of manual transmission.