齿轨铁路道岔可动齿轨转换系统设计及仿真分析

Design and Dynamic Simulation Analysis of Movable Rack Switch System for Simple Turnout of Rack Railway

齿轨铁路为国内新型制式交通,为解决齿轨铁路运行中岔区股道转换问题,保证齿轨列车顺利通过齿轨岔区,通过对比现有齿轨道岔结构形式及结构特点,基于齿轨覆盖可分式道岔提出一种岔区可动齿轨转换机构。基于该齿轨转换系统结构建立三维有限元模型,并利用ADAMS软件对该齿轨转换机构进行动力学仿真,分析连杆机构中各部件的运动受力情况,同时使用ANSYS软件分析该齿轨转换机构的应力分布情况。研究表明:设计的岔区可动齿轨转换机构无死点,在运行过程中安全可靠;可动齿轨运动过程中,转辙机动作杆受力满足最大输出力要求;各连杆机构部件最大等效应力均小于其许用应力,满足机构静力学设计要求。

Rack railway is a new type of transportation in China.In order to solve the key problem of track change in the operation of the rack railway and to ensure that the train can pass through the rail turnout smoothly,this paper proposes a movable rack switch mechanism in the turnout based on the track-covered detachable turnout by comparing the structural forms and characteristics of the existing rack railway turnouts.Furthermore,with the finite element model of the rack switch system established,the dynamic simulation of the mechanism is carried out by using software ADAMS,and the motion force of each component in the linkage mechanism is analyzed.At the same time,the stress distribution of the mechanism is analyzed with software ANSYS.The results show that the designed movable rack switch mechanism can operate safely and reliably without dead point and the force on the operating rod of the switch system meets the requirement of the maximum output force in the movement.Besides,the maximum equivalent stress of each link for the rack switch system is less than its allowable stress,which meets the static design requirements for the mechanism.