Abstract:  In order to improve the compaction quality of vibratory rollers, the energy transfer model of vibratory rollers and the optimisation of operating parameters were studied. Firstly, the system vibration dynamics model of “wheel-compacted material” was established based on the U-K equation, and the energy transfer model of vibratory roller was proposed in combination with energy conservation.Then, the vibration frequency and compaction speed were taken as the optimal working parameters to construct the optimisation model of road compaction quality.Finally, the feasibility and effectiveness of the proposed method were proved through case verification. The results show that: the ratio between the working frequency and the intrinsic frequency of the compacted material is kept within the range of 2～2 to avoid the effect of resonance.The initial stage of low-speed rolling, and after the material properties were stabilised, the rolling speed may be increased to ensure efficient compaction, which results in the vibration frequency in the range of 21.8～27 Hz and the compaction speed in the range of 2.36～2.91 km/s, to achieve the optimal compaction effectiveness. The proposed energy transfer model and operation parameter optimisation model lay a foundation for guaranteeing the compaction quality of vibratory rollers and provide a reference for improving the compaction quality and efficiency of vibratory rollers.

Key words: vibration dynamics, compaction model, optimum operating parameter, vibratory roller

摘要： 为提高振动压路机作业过程的压实质量，研究了振动压路机的能量传递模型与作业参数优化。首先基于U-K方程建立“碾轮被压实材料”的系统振动动力学模型，结合能量守恒提出振动压路机能量传递模型；然后以振动频率和压实速度作为寻优工作参数，构建路面压实质量的优化模型；最后通过案例验证证明了所提方法的可行性与有效性。结果表明：工作频率与被压实材料的固有频率比值保持在2～2范围内，可避免共振带来的影响；初始阶段低速碾压，材料性能稳定后提高碾压速度可保证高效压实，得出振动频率在21.8～27 Hz、压实速度在2.36～2.91 km/s范围内，可达到最优的压实效果。所提的能量传递模型、作业参数优化模型为保障振动压路机压实质量奠定了基础，为提高振动压路机压实质量和效率提供了参考。

关键词: 振动动力学, 压实模型, 最优作业参数, 振动压路机