基于多体动力仿真软件构建了柴油机动力装置的安装运行环境模型，并结合实际使用场景，基于FFT方法建立了等效于D级路面的不平路面模型。基于所建模型，分析了车速、车体质量、悬置刚度三种因素对柴油机动力装置振动的影响。研究发现：在履带车辆不平路面行驶条件下，柴油机动力装置的振动呈连续频率分布；车速变化会使振动强度小幅增加；车体质量会影响小幅度振动的幅值和频次，车体质量增加时，小幅度振动的幅值和频次减少；另外，悬置刚度的增加会导致柴油机动力装置振动幅值和频次成倍增加，在三种因素中影响最大。
The installation and driving environment model of
diesel power unit was built by using multi-body dynamics software, and
Class D uneven road model was established according to FFT method and real-world usage scenarios. Based on the established model, the influence
of vibration for diesel power unit was studied under the variation conditions
of vehicle speed, vehicle body mass, and suspension stiffness. The results show
that the vibration of diesel power unit indicates the distribution of
continuous frequency under the conditions of tracked vehicle uneven road driving.
The change of vehicle velocity will lead to small-amplitude
increase of vibration intensity, and the change of vehicle body mass will
influence the amplitude and frequency of small-amplitude vibration. The vehicle body mass increases, and the amplitude and
frequency of small-amplitude vibration decrease. In
addition, increased suspension stiffness will lead to a significant increase in
both the amplitude and frequency of vibrations in the diesel power unit, making
it the most influential factor among the three.
