共查询到20条相似文献,搜索用时 171 毫秒
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介绍了TM-100型缓冲器的结构、性能以及工作原理,并给出了缓冲器落锤试验及冲击试验情况。结果表明,用胶泥组件替换MT-2型缓冲器的内簧后,TM-100型缓冲器具有了与冲击速度相匹配的胶泥缓冲器的阻抗性能,并可将缓冲容量提高60%~100%。采用动力学仿真的方法研究了TM-100型缓冲器与MT-2型缓冲器对列车纵向冲动的缓冲作用,比较了两种缓冲器的不同之处,指出TM-100型缓冲器不仅显著提高了缓冲器的容量,能够解决MT-2型缓冲器容量小、行程上不足的缺点,而且降低了车钩力的瞬态冲击值,进而实现改善钩缓工作环境、提高钩缓装置使用寿命的目的,充分满足万吨级列车的运用要求。 相似文献
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针对重载机车在牵引试验中出现的脱轨现象,研究了重载机车在承受纵向压钩力作用时车钩的稳钩能力。以重载机车常用的LAF车钩和13号车钩为例,在结构分析的基础上,比较分析了大转角车钩和小转角车钩不同的稳钩方式和稳钩原理。建立了充分考虑车钩缓冲器、钩肩/止挡特性的车钩模型,并将其应用到某四节连挂机车牵引的万吨级列车模型中。通过动力学仿真研究了分别采用两种车钩模型的机车在纵向压钩力作用下的动力学行为,发现无钩肩装置的13号车钩在纵向压钩力作用下会引起车钩与钩尾框的刚性冲击,同时指出车钩水平自由转角的不同是引起不同车钩模型可以承受的最大纵向压钩力不同的根本原因。纵向压钩力作用下车钩的倾倒同时会引起车轮偏磨现象的发生,稳钩能力差的车钩导致的车轮偏磨更严重。 相似文献
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摘要:介绍了QKX100型弹性胶泥缓冲器的特点,并与我国目前在用的其他机车缓冲器进行对比。介绍了该型缓冲器在大秦线的运用经历和遇到的问题,针对存在的问题提出加强密封的方案,新方案已通过地面试验,正在进行装车运用考验。关键词:QKX100型胶泥缓冲器;机车;运用;改进中图分类号:U260.342文献标识码:B文章编号:2095-5901(2014)01-0047-02 相似文献
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应用动力匹配软件CRUISE,建立装载机的整车模型,着重在行驶工况下进行仿真计算分析。针对装载机的作业工况,建立柴油机万有特性的数学模型,对装载机的燃油消耗进行仿真计算;并根据实测结果验证模型的准确性。 相似文献
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The transient dynamics of a drill string and the dynamic characteristics of bit control force during compound drilling have not been elucidated yet. A numerical simulation model of drill string with a positive displacement motor was established to analyze the transient dynamics of drill string. The calculation model of dynamic bit control force was proposed based on the results of the transient dynamics of drill string. The results show that, when compared with conventional drilling, the impact frequency and the mean and peak values of drill string–wellbore interaction were larger. The effect of compound drilling on the lateral vibration acceleration of drill string was greater than that on the longitudinal vibration acceleration. A heightened build-up effect was caused by the increase of weight on bit. The larger bend angle and higher position of the stabilizer were not conducive to the stable control of the well trajectory. The increased outer diameter of the stabilizer could reduce the build-up effect of the bottom hole assemble to a certain extent. The driller in the field control of a well trajectory should be based on the complex dynamics of the numerical model of the bottom hole assemble during compound drilling. 相似文献
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主要分析自动车钩的弹簧刚度和阻尼系数对列车纵向动力学的影响。采用了非线性模型,此模型由1台机车和3辆货车组成,它们之间有3个自动车钩。通过分析研究表明,车钩的最大拉钩力和压钩力都会随着弹簧刚度的增大而增大,而车钩力的均方根值则会随着弹簧刚度的增大而减小。阻尼系数对列车纵向动力学的影响则是:最大压钩力会随着阻尼系数的增大而增大,而最大拉钩力和车钩力均方根值会随着阻尼系数的增大而减小。 相似文献
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基于实际道路激励谱的摩托车平顺性混合仿真分析 总被引:2,自引:0,他引:2
应用道路模拟试验技术、有限元分析法和多体动力学仿真技术建立了摩托车平顺性混合仿真分析模型,并验证和改进了仿真模型;根据相关文献和标准探索了摩托车平顺性客观评价方法,最后对摩托车平顺性仿真进行了客观评价. 相似文献
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Thermal comfort in an automobile is predicted with numerical simulation. The flow field and temperature distribution are solved with a grid system based on many small cubic elements which are generated automatically with cabin and passenger configuration. Simulation of temperature is combined with simulation of cooling cycle and calculation of heat transfer at the wall including solar radiation to treat transient and actual driving conditions of the vehicle. In order to evaluate thermal comfort, transitional effective temperature is calculated from simulated thermal conditions and physiologic values which are calculated by a simple model of a human thermal system. This system can well predict thermal sensation of passengers in a short period of time. © 2001 Scripta Technica, Heat Trans Asian Res, 30(3): 195–212, 2001 相似文献
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基于虚拟样机技术的柴油机曲柄连杆机构动力学仿真研究 总被引:1,自引:0,他引:1
基于虚拟样机技术及其支撑软件ADAMS及Pro/E和ANSYS,实现了对柴油机曲柄连杆机构的动力学仿真。通过多刚体系统动力学和多柔体动力学仿真柴油机的运行,获取了仿真模型的动力学特性数据,为柴油机曲柄连杆机构对机体的激励力的优化设计和有限元分析提供了参考依据。 相似文献