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Contact analysis of wheel-rail system in large telescope

机译:大型望远镜中轮轨系统的接触分析

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The development of large aperture telescope puts forward an increasingly high requirement to the antenna's point accuracy. When the azimuth rotating part of large aperture radio telescope uses the wheel-rail system, the impact of wheel-rail pointing errors and the problem of wheel-rail wear are urgent to be solved. This paper first discusses the advantages and disadvantages of wheel-rail pedestal and puts forward some problems in wheel-rail system. Then compares the properties of three wheel-rail systems and references some research on traffic rail and wheel-rail crane system. Next, it introduces the contact theory to lay the foundation for the analysis of wheel-rail contact system. Finally, it analyzes the wheel-rail model in MSC.Patran/Nastran software, the result shows that the max strain and stress is in the rail. We also compare the ideal and actual wheel-rail contact model to find out the crevice's influence on the mechanical properties of wheel-rail contact system.
机译:大口径望远镜的发展对天线的点精度提出了越来越高的要求。当大口径射电望远镜的方位旋转部分采用轮轨系统时,迫切需要解决轮轨指向误差的影响和轮轨磨损的问题。本文首先讨论了轮轨基座的优缺点,并提出了轮轨系统中的一些问题。然后比较了三种轮轨系统的性能,并参考了交通轨道和轮轨起重机系统的一些研究。接下来,介绍接触理论,为轮轨接触系统的分析奠定基础。最后,在MSC.Patran / Nastran软件中对轮轨模型进行了分析,结果表明最大的应变和应力在轨中。我们还比较了理想的和实际的轮轨接触模型,以找出缝隙对轮轨接触系统机械性能的影响。

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