越障工况下铰接式胶轮车力学分析与优化设计

发布时间：2018-06-20 21:46

本文选题：铰接式胶轮车 + 机液联合仿真　；参考：《中北大学》2017年硕士论文

【摘要】：防爆无轨胶轮车因其较强的机动性能大大提高了煤矿的生产效率,促使国外铰接式胶轮车的设计研究得到快速发展。国内针对矿用铰接式胶轮车的研究起步较晚,目前设计理论尚不完善,仍处于仿造阶段。铰接转向机构作为胶轮车的重要组成部分,直接关系到车辆的机动性能,矿用胶轮车多使用在井下,井下巷道岩石多,而胶轮车本身越障时受力更大,更容易发生破坏。因此,本文针对胶轮车越障工况下的性能进行研究,并根据实际问题及分析结果对铰接转向机构进行结构改进。旨在为国内胶轮车的进一步发展提供一定的理论依据。主要研究结果如下:选取矩形台阶路面这种典型路况,利用ADAMS、AMESim建立铰接式胶轮车的机液联合仿真模型,仿真分析车辆在转向状态下通过这障碍路面时的车体载荷分布及转向稳定性等性能,并基于ANSYS对胶轮车进行瞬态动力学仿真。最终能够发现防爆无轨胶轮车存在扭矩过大、应力集中、侧倾稳定性不好的问题。为了验证所建立机液联合仿真模型的可靠性,进行了防爆柴油机无轨胶轮车转向越障的实验,发现实验结果与仿真结果吻合度较高,表明所建立的机液联合仿真模型是合理的,可以作为研究防爆无轨胶轮车的工具,得出确实存在仿真所发现的问题。为了解决胶轮车存在的问题,对胶轮车铰接转向机构进行了改进,引进了二自由度铰接盘,建立了二自由度胶轮车,对新建立的二自由度铰接车模型进行研究,与原来的仿真结果进行对比,发现在应力、扭矩和侧倾稳定性方面都有了一定提高,解决了最开始发现的问题。针对新建立的二自由度胶轮车,为了分析其越过障碍时的性能,建立其越过台阶障碍时的力学模型,进而计算其单侧车轮越过台阶障碍时的极限高度,通过使胶轮车越障极限高度最大来重新设计铰接盘的几何尺寸,从而达到优化二自由度胶轮车越障性能的目的。本文研究结果可为铰接式胶轮车转向机构的设计提供一定的理论依据。
[Abstract]:The explosion-proof trackless rubber wheel car has greatly improved the production efficiency of the coal mine because of its strong maneuverability, and has promoted the rapid development of the design and research of the articulated rubber wheel car abroad. The domestic research on the mine articulated rubber wheel car started late, and the design theory is not perfect at present, it is still in the stage of imitation. As an important part of rubber wheel vehicle, hinge steering mechanism is directly related to the motor performance of the vehicle. The mine rubber wheel car is mostly used in the underground, and there are more rocks in the underground roadway, while the rubber wheel car itself is subjected to more stress when it overcomes the obstacle and is more prone to damage. Therefore, this paper studies the performance of the rubber wheel vehicle under the condition of overrunning obstacles, and improves the structure of the hinge steering mechanism according to the actual problems and the analysis results. The purpose is to provide certain theoretical basis for the further development of domestic rubber wheel car. The main results are as follows: select the typical road condition of rectangular step pavement, and establish the joint simulation model of the articulated rubber wheel car by using Adams AMESim. The performance of vehicle body load distribution and steering stability under steering condition is analyzed, and the transient dynamics simulation of rubber wheel vehicle is carried out based on ANSYS. Finally, it can be found that the explosion-proof trackless rubber wheel vehicle has the problems of excessive torque, stress concentration and poor roll stability. In order to verify the reliability of the combined simulation model, an experiment was carried out on the anti-explosion diesel engine trackless rubber wheel vehicle. It was found that the experimental results were in good agreement with the simulation results, which indicated that the model was reasonable. It can be used as a tool to study the explosion-proof trackless rubber wheel vehicle, and the problems found by simulation are obtained. In order to solve the problems existing in the rubber wheel car, the hinge steering mechanism of the rubber wheel car is improved, the two degree of freedom hinge disc is introduced, the two degree of freedom rubber wheel car is established, and the new two freedom degree of freedom hinge car model is studied. Compared with the original simulation results, it is found that the stress, torque and roll stability have been improved to some extent, and the problems found at the beginning have been solved. In order to analyze the performance of the newly established two-degree-of-freedom rubber wheeled vehicle, a mechanical model is established to calculate the limit height of the one-sided wheel when it crosses the step obstacle in order to analyze the performance of the vehicle, and to establish a mechanical model for the vehicle to cross the step obstacle. In order to optimize the performance of two-degree-of-freedom rubber wheel vehicle, the geometric dimension of the hinge plate is redesigned by making the maximum height of the obstacle crossing limit of the rubber wheel vehicle. The results of this paper can provide some theoretical basis for the design of steering mechanism of articulated rubber wheel car.
【学位授予单位】：中北大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD50

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