Experimental Study On Double-drum Vibratory Roller Uneven Amplitude

In recent years,the domestically produced Double-drum vibratory roller's output grows largely,but the domestic roller compaction quality worse than imports. When operating in the compaction,compaction quality is not high, pavement not formation, some even roller can not travel in a straight line, so China's Double-drum vibratory roller can not achieve high-grade highway in the surface layer of compacted operations. The reason is that vibration is round about the two ends of the amplitude of uneven. On some performance test of domestic Double-drum vibratory roller found that, China's Double-drum vibratory roller vibration amplitude round at both ends of the larger differences exist, sometimes more than 20%, this will seriously affect Double-drum vibratory roller on the performance and uniformity of compaction.In order to solve this problem, we have carried on the analysis to the Double-drum vibratory roller's structure and the performance. Double-drum vibratory roller vibration round of the structure is asymmetric, vibration round with the support of body connection, driver-side rely on the round-reducer, vibration side rely on the framework of bearings. However, in the calculation of quality, the damping effect, the uniform amplitude and so on, often in accordance with the "symmetry" to consider about it. This will inevitably lead to the gap between actual and theoretical calculations of the discrepancies, from Double-drum vibratory roller drum along the axis of greater amplitude uneven.The establishment of four degrees of freedom model, the model considered the rack in the center of mass from the side, vibration from the partial round of heart, stiffness and vibration damping block round of the amplitude of the vibration of the impact of inequality.Based on this model, the use of MATLAB simulation programming language, the analysis of the vibration caused uneven round of the amplitude of the single-factor and multi-polarization factors affecting the situation. Come to the conclusion that: vibration round of partial from the heart, rack of heart from the side, block stiffness and vibration damping of vibration amplitude round of the uniformity of the impact of the decline is followed, the impact of factors at the same time, the vibration along the axis direction of the round Amplitude deviation will be greater.To verify the accuracy of simulation analysis, a certain brand of domestic 11 t-Double-drum vibratory roller effect of vibration testing and analysis of the scene. The results showed that the measured results and simulation results similar to prove the correctness of the vibration model for the design and use of rollers to provide a reference.