履带车辆液压悬架抗俯仰互联模式研究

Anti-pitch Interconnection Mode of Hydraulic Suspension for Tracked Vehicles

针对独立悬架式履带车辆在俯仰工况下减振性能较差的问题,提出利用油管将车身同侧不同轴的减振器进行互联的方案。首先,提出俯仰工况下的3种互联模式,模式1、模式2、模式3分别为第1及第2轴减振器互联、第1及第6轴减振器互联、第2及第6轴减振器互联;其次,建立1/2履带车辆减振器机-液-热模型;然后,根据谐波叠加法利用MATLAB和RecurDyn编译E级路面模型;最后,利用AMESim和RecurDyn搭建液压互联悬架模型和整车动力学模型的机-液-热联合仿真平台,与装有独立悬架的履带车辆进行E级路面下的抗俯仰性能进行对比分析。仿真结果表明,安装3种模式的液压互联悬架履带车辆降低了车身俯仰角均方根值,降幅分别为3.97%、5.96%、3.53%,模式2的车身俯仰角最大值相较于独立悬架降低了0.010 4 rad,降幅为14.11%,抗俯仰性能最优。

Aiming at the problem of poor vibration damping performance of independent suspension tracked vehicles under pitching conditions,a scheme using oil pipes to interconnect the shock absorbers of different axles on the same side of the vehicle body was proposed.Firstly,three interconnection modes under the pitching condition were proposed.Modes 1,2,and 3 respectively refer to the interconnection of the first and second axis shock absorbers,the interconnection of the first and sixth axis shock absorbers and the interconnection of the second and sixth axis shock absorbers.Secondly,the mechanical-hydraulic-thermal model of 1/2 tracked vehicle shock absorber was established.Then,the E-level pavement model was compiled according to the harmonic superposition method by using MATLAB and RecurDyn.Lastly,the mechanical-hydraulic-thermal joint simulation platform of the hydraulically interconnected suspension model and the whole vehicle dynamics model was established by use of AMESim and RecurDyn.And the anti-pitch performance of the vehicle was compared and analyzed with that of the tracked vehicle equipped with an independent suspension under the E-level road surface.The simulation results show that the hydraulic interconnected suspension tracked vehicles with the installation three modes reduce the root-mean-square value of the body pitch angle by 3.97%,5.96%,and 3.53%,respectively,and the maximum value of the body pitch angle of mode 2 reduces by 0.0104 rad compared with that of the independent suspension,with a reduction of 14.11%,which has the best anti-pitch performance.