基于ADAMS的TBM刀盘系统载荷与动力特性仿真分析

发布时间：2018-09-18 07:32

【摘要】：TBM（Tunnel Boring Machine）即隧道掘进机，是利用回转刀具破碎岩石，从而形成隧道断面的一种先进的隧道施工机械。作为盾构机的关键部件之一，刀盘系统主要起到开挖岩体、稳定工作面的功能。刀盘系统的工作性能直接影响到盾构施工的效率。本文基于ADAMS对TBM刀盘系统的破岩过程进行刚柔耦合动力学仿真分析，研究刀盘系统的载荷与动力特性，为盾构的安全、低振、平稳运行提供理论依据。本文主要对以下几个方面的内容进行了研究。（1）为了研究TBM刀盘系统在破岩掘进过程中的动力学行为，将掌子面设计成具有凹槽和凸齿的形状。利用UG建立刀盘系统和不同齿高的掌子面刚性模型,并将装配后的模型导入ADAMS中进行仿真计算，得出了刀盘上各个滚刀的接触力和加速度变化曲线，并对不同破岩深度时的载荷和加速度变化情况进行了比较研究。结果表明，岩块剥落的厚度会影响刀盘系统运行的平稳性。当岩块剥落厚度在8~12毫米变化时，厚度在9mm时刀盘系统的运行最为平稳。（2）为深入研究岩石柔性对刀盘系统动力学响应的影响，将平坦掌子面模型使用ANSYS柔性化，，再将刀盘系统刚性模型和柔性掌子面模型导入ADAMS中进行仿真计算,得到了刀盘上各个滚刀的接触力及其幅值变化曲线。结果显示，考虑上岩石的柔性以后，刀盘系统的运行更加平稳。（3）为研究柔性岩石的剥落对滚刀动力学行为的影响，将带有凸齿的掌子面与单个刚性滚刀模型导入ADAMS并进行仿真计算，得到了滚刀与掌子面的接触力变化规律，并分析了岩石性质对滚刀载荷的影响。（4）为了研究刀盘系统的柔性性质对刀盘动力性能的影响，将柔性的刀盘系统模型与凸齿高度h=9mm的刚性掌子面模型在ADAMS中进行动力学仿真计算，得到了刀盘上各个滚刀与掌子面的接触力变化情况，并与柔性掌子面的相应结果进行了比较分析。
[Abstract]:TBM (Tunnel Boring Machine) (Tunnel tunneling Machine) is an advanced tunnel construction machine which uses rotary tool to break rock and form tunnel section. As one of the key components of shield machine, the cutter head system mainly plays the function of excavating rock mass and stabilizing working face. The working performance of the cutter head system directly affects the efficiency of shield construction. In this paper, the rigid-flexible coupling dynamic simulation of TBM cutter head system is carried out based on ADAMS, and the load and dynamic characteristics of the cutter head system are studied, which provides a theoretical basis for the safe, low vibration and smooth operation of shield machine. In this paper, the following aspects are studied. (1) in order to study the dynamic behavior of TBM cutter head system in the process of rock breaking excavation, the face of the palm is designed to have the shape of groove and protruding teeth. UG is used to establish the rigid model of the cutter head system and the palm face with different tooth height, and the model after assembly is imported into ADAMS for simulation and calculation. The contact force and acceleration curves of each hob on the cutter head are obtained, and the change curves of the contact force and acceleration of each hob on the cutter head are obtained. The variation of load and acceleration at different rock breaking depth is compared. The results show that the flaking thickness of the rock block will affect the stability of the cutter head system. When the thickness of rock flaking is 812 mm, the operation of the cutter head system is most stable when the thickness is at 9mm. (2) in order to deeply study the influence of rock flexibility on the dynamic response of the cutter plate system, the flat palm surface model is made with ANSYS flexibility. Then the rigid model of cutter head system and the flexible palm surface model are introduced into ADAMS for simulation and calculation, and the contact force and amplitude change curve of each hob on the cutter head are obtained. The results show that considering the flexibility of rock, the operation of cutter head system is more stable. (3) in order to study the influence of flaking of flexible rock on the dynamic behavior of hob, The model of the face with convex teeth and a single rigid hob are imported into ADAMS and simulated, and the law of the contact force between the hob and the face of the hand is obtained. The influence of rock properties on the load of hob is analyzed. (4) in order to study the influence of flexible character of cutter head system on the dynamic performance of cutter head, The dynamic simulation of the flexible cutter head system model and the rigid palm surface model of h=9mm with convex tooth height is carried out in ADAMS, and the change of the contact force between each hob and the palm surface on the cutter head is obtained. The results are compared with the corresponding results of the flexible palm surface.
【学位授予单位】：河北工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U455.31

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