盾构机管片拼装微调机构动力学分析

Dynamic Analysis of Trimmer Mechanism of Segment Erector in Shield Machine

摘要:

为了研究拼管作业时盾构机管片拼装微调机构驱动油缸的推力，分析了微调机构在偏转和俯仰运动下的动力学特性。首先，对简化的管片拼装微调机构平台角度与驱动油缸行程的关系进行研究，并利用Matlab Simscape模块对机构进行建模仿真，得到指定运动轨迹下2个驱动油缸的驱动力；接着，利用ADAMS（automatic dynamic analysis of mechanical systems）对机构进行动力学仿真，验证所搭建模型的正确性；最后，利用ADAMS对机构进行带载工况下的动力学仿真，得到2个油缸的最大推力。结果表明，管片拼装微调机构在以幅值为0.035 rad、角频率为1 rad·s^-1的正弦函数进行俯仰和偏转运动时2个油缸的最大推力分别为 8 998.47 N和6 390.48 N。

Abstract:

In order to study the thrust of cylinders in the trimmer mechanism of a segment erector under the pipe-splicing operation， the dynamic characteristics of the trimmer mechanism under yaw and pitch motions were analyzed. Firstly， the relationship between the platform angle of the simplified trimmer mechanism and the stroke of the driving cylinder was figured out. Secondly， the mechanism was modeled and simulated with Matlab Simscape to obtain the thrust values of two cylinders under the specified motion. Thirdly， the mechanism model was verified by ADAMS to carry out the dynamic simulation. Lastly， the dynamic simulation of the mechanism model under working load was carried out with ADAMS， and the maximum thrust values of the two cylinders were obtained. The results show that the maximum thrusts of the two cylinders are 8 998.47 N and 6 390.48 N respectively when the trimmer mechanism performs pitch and yaw motions as a sinusoidal function with an amplitude of 0.035 rad and an angular frequency of 1 rad·s^-1.