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[目的]基于理论推导建立凸齿镇压器作业过程中的运动学和动力学模型。[方法]根据运动学中刚体做平面运动的瞬心定理和牵连运动为平动时质点的加速度合成定理,建立凸齿镇压器在不同工作阶段的运动参数模型;根据动力学中的动量定理、动能定理和冲量定理,建立凸齿镇压器工作状态中所需牵引力、凸齿与地面作用瞬间产生的冲击力和冲击能的参数模型。[结果]凸齿镇压器作业过程中所需的牵引力随着凸齿镇压器的自身质量和滚动阻力系数的增加而增大,而凸齿镇压器转动惯量的增加会降低凸齿镇压器所需牵引力;冲击过程中,凸齿镇压器的牵引速度越大、质量和转动惯量越大、冲击时间越短,则冲击力越大;凸齿镇压器冲击土壤时的冲击能随着凸齿的转动惯量、质量和质心竖直向下移动距离的提高而增加,而随土壤的弹性系数与土壤的塑性变形量的增加而减小。[结论]建立了凸齿镇压器在不同工作状态下运动学及动力学模型,分析并揭示了凸齿镇压器结构参数与运动参数间的相互联系,探索了凸齿镇压器冲击土壤的特征规律,为设计和优化其结构参数和运动参数提供了理论依据。
[Objective] To deduce the kinematics and dynamics model of the process of forming convex tooth roller based on theory. [Method] According to the theorem of instantaneous center of rigid body in plane kinematics and the acceleration synthesis theorem of implicated body in translation, the model of kinematic parameters of male tooth profiler in different working stages was established. According to the momentum theorem in dynamics, Kinetic energy theorem and impulse theorem, establish the parameter model of the required pulling force in the working state of the convex tooth roller and the impact and impact energy instantaneously generated by the action of the convex tooth and the ground. [Result] The required traction force during the operation of the convex tooth roller increased with the self-mass and the rolling resistance coefficient of the male tooth roller. However, the increase of the moment of inertia of the male tooth roller would reduce the requirement of the male tooth roller Traction force; During the impact process, the greater the traction speed of the convex tooth roller, the greater the mass and moment of inertia, the shorter the impact time, the greater the impact; the impact energy of the convex tooth roller when impacting the soil with the rotation of the convex tooth The inertia, mass and centroid increase vertically with the distance increasing, but decreases with the increase of elastic coefficient of soil and plastic deformation of soil. [Conclusion] The kinematics and dynamics model of the convex tooth roller under different working conditions was established. The relationship between the structural parameters and the movement parameters of the convex tooth roller was analyzed and revealed. The characteristics and rules of the impact of the convex tooth roller on the soil , Which provides a theoretical basis for designing and optimizing its structural parameters and motion parameters.