Abstract:The initial compaction of road paving mainly depends on the tamper mechanism of paver. The phase relationships have great impacts on the dynamic characteristics of the tamper. For a certain paver, a 2 DOF dynamic model of tamper cross section was established based on the rigid body assumption. The relationships between different tamper beam phase, based segment phase, extended segment phase and the inertia force of tamper mechanism were simulated. The effects of these kinds of phases on the energy of tamper mechanism were obtained, and the phase parameters were optimized. Then, a method for testing screed pressure was put forward to verify the feasibility of optimized phases via the pressure distribution characteristics of the screed to the ground. The results show that when the tamper beam phase is 90° and the extended segment phase is 180°, the tamper mechanism inputs the minimum total energy to the screed, and the screed pressure distribution is more uniform.
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