关键词: 车辆工程；履带车辆；互联模式；机-液-热模型；液压互联悬架；抗俯仰性能

Abstract: 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.

Key words: vehicle engineering; tracked vehicles; interconnection mode; mechanical-hydraulic-thermal model; hydraulic interconnected suspension; anti-pitch performance