变刚度条件下隧道掘进机撑靴液压缸的动态特性

发布时间：2018-03-27 08:04

本文选题：全断面岩石隧道掘进机　切入点：撑靴液压缸　出处：《上海交通大学学报》2017年09期

【摘要】：全断面岩石隧道掘进机(Tunnel Boring Machine,TBM)的振动将造成其撑靴液压缸损伤,进而影响TBM的掘进.考虑液压缸的结构及其工作过程中的变刚度特性,基于拉格朗日方法建立了TBM撑靴液压缸集中参数动力学模型,分析了活塞杆伸出量、撑靴界面刚度和油液等效刚度等因素对液压缸振动的影响,并分析了TBM工作过程中,撑靴液压缸内部的载荷特性.结果表明:随着活塞杆伸出量的增加,液压缸的固有频率略有下降;随着撑靴界面刚度和导向铜套的等效刚度增加,液压缸的固有频率略有提高;活塞杆密封和油液等效刚度对撑靴液压缸的振动固有频率的影响最明显.通过分析TBM撑靴液压缸的动态特性,可以得到撑靴液压缸的振动载荷规律,为研究液压缸的损伤提供了载荷基础.
[Abstract]:The vibration of full section rock tunnel tunneling machine tunnel Boring machine will result in the damage of its boot hydraulic cylinder, and then affect the driving of TBM. Considering the structure of hydraulic cylinder and its variable stiffness characteristics in the working process, Based on the Lagrange method, the dynamic model of concentrated parameters of TBM propping shoe hydraulic cylinder is established, and the effects of piston rod protruding amount, interface stiffness and equivalent stiffness of oil on the vibration of hydraulic cylinder are analyzed, and the working process of TBM is analyzed. The results show that the natural frequency of the hydraulic cylinder decreases slightly with the increase of the piston rod extension, and the natural frequency of the hydraulic cylinder slightly increases with the increase of the interface stiffness of the bracing boot and the equivalent stiffness of the guide copper sleeve. The piston rod seal and the equivalent stiffness of oil have the most obvious influence on the vibration natural frequency of the hydraulic cylinder. By analyzing the dynamic characteristics of the TBM hydraulic cylinder, the vibration load law of the hydraulic cylinder can be obtained. It provides a load basis for studying the damage of hydraulic cylinder.
【作者单位】：上海交通大学机械系统与振动国家重点实验室;上海交通大学上海市复杂薄板结构数字化制造重点实验室;
【基金】：国家自然科学基金资助项目(51275292) 国家重点基础研究发展规划(973)项目(2013CB035403)
【分类号】：U455.31

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