新型三轮大车机构轮轨动力学响应分析

发布时间：2018-01-19 20:35

本文关键词： 轮轨垂向力轮轨接触刚度动力学模型错牙接头　出处：《中国工程机械学报》2017年04期 　论文类型：期刊论文

【摘要】：针对运输需求的日益提高,使得轨道式集装箱起重机大车行走机构与轨道间的动力作用进一步恶化,严重影响机构零部件及轨道的使用寿命等问题,提出一种新型轨道式三轮大车机构的设计方案.利用车架和连杆平衡机构代替原有平衡梁结构,以达到降低大车高度,得到良好的大车行走机构动力学性能的目的.为验证新型结构设计的合理性,基于拉格朗日动力学方法,建立并推导了新型大车行走机构的动力学方程,建立了轨道错牙接头、宽轨缝接头和焊缝接头的数学激励模型,研究其在3类轨道缺陷激励下的轮轨垂向作用力的响应.为验证轮轨耦合动力学模型的正确性和合理性,对其进行了虚拟样机仿真模型的建立和分析.研究表明,结构优化后的新型大车机构具有良好的轮轨动力学特性,有效降低了大车行走机构高度.
[Abstract]:In view of the increasing transportation demand, the dynamic action between the traveling mechanism and the track of the rail container crane is further deteriorated, which seriously affects the service life of the mechanism parts and track, and so on. This paper presents a design scheme of a new type of track-type three-wheeled truck mechanism, which uses the frame and the connecting rod balance mechanism to replace the original balance beam structure in order to reduce the height of the cart. In order to verify the rationality of the new structure design, based on Lagrange dynamic method, the dynamic equation of the new type of trolley walking mechanism is established and deduced. The mathematical excitation models of rail mismatch joint, wide rail seam joint and weld joint are established. In order to verify the correctness and rationality of the wheel-rail coupling dynamic model, the response of the wheel-rail vertical force under the excitation of three kinds of rail defects is studied. The virtual prototype simulation model is established and analyzed. The results show that the new type of vehicle mechanism has good wheel-rail dynamic characteristics and effectively reduces the height of the moving mechanism.
【作者单位】：同济大学机械与能源工程学院;
【基金】：国家科技支撑计划资助项目(2015BAF06B05)
【分类号】：TH21
【正文快照】： 平衡梁均载型大车行走机构一般安装于起重机支腿位置,以实现起重机的均载运输,被广泛应用于各种港口轨道式起重机中[1].随着港口装卸运行速度的提高和运输重量的增大,大车与轨道间的动力作用也进一步恶化,承载结构也会受到动力附加载荷的作用,从而引起整机加剧振动,影响使用性

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