新型三轮大车机构轮轨动力学响应分析  

Wheel-rail dynamic analysis of a new rail mounted three-wheeled gantry

作　　者：张氢[1] 陈淼 孙峰[1] 秦仙蓉[1] 孙远韬[1] 

机构地区：[1]同济大学机械与能源工程学院,上海201804

出　　处：《中国工程机械学报》2017年第4期329-337,共9页Chinese Journal of Construction Machinery

基　　金：国家科技支撑计划资助项目(2015BAF06B05)

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.Wheel-rail dynamic response between rail mounted gantry and rail becomes worse in view of the transport demand increases severely,affecting the service life of parts and rail seriously.This paper proposes a new rail mounted three-wheeled gantry which replaces the original balance beam structure with frame and balancing-linkage mechanism to reduce RMG height and enhance its dynamic performance.To verify the rationality of the new structure design,gantry＇s dynamic equation is established based on Lagrange dynamics method,and the wheel-rail vertical dynamic response is calculated under the three typical types of rail defects,these are rail joint,broad rail gap joint and weld joint.Dynamic simulation in ADAMS is conducted to verify the calculated results further.The results show that the correctness and rationality of the dynamic model of wheel-rail,the new rail mounted three-wheel gantry has good dynamic performance,and the height of the gantry could be effectively reduced.

关 键 词：轮轨垂向力 轮轨接触刚度 动力学模型 错牙接头 

分 类 号：TH213.5[机械工程—机械制造及自动化]