基础振动环境下TBM液压空间管道设计方法

Design method of TBM hydraulic space pipeline under foundation vibration environment

针对硬岩掘进机(TBM)工作过程中产生的强振动影响液压空间管道工作性能的问题,基于双向流固耦合理论和有限元方法建立基础振动下空间管道仿真模型,分析基础振动参数和管道结构参数对管道应力特性的影响。根据应力与功率的关系,建立空间管道流体功率流数学模型,研究基础振动参数和管道结构参数对管道流体功率流影响规律。利用综合评分法与正交实验分析空间管道结构参数影响的主次顺序,优化管道结构参数使得管道最大主应力降低56.27%,提出基础振动下空间管道的设计流程。研究结果表明:影响管道最大应力和流体功率流的管道结构参数主次顺序依次为曲率半径、壁厚及内径,其中曲率半径75 mm、壁厚25 mm、内径5 mm为最佳结构参数组合,本文所提分析方法能为基础振动下空间管道设计与选型提供参考。

Aiming at the problem that the strong vibration generated during working process of the tunnel boring machine(TBM) affects the performance of hydraulic space pipeline, simulation model of space pipeline with basic vibration was established based on the bidirectional fluid-solid interaction theory and the finite element method.The influences of basic vibration parameters and the pipeline structure parameters on the stress characteristics was analyzed by simulation. The mathematical model of the space pipeline fluid power flow was established by the relationship between stress and power. The influence rules of basic vibration parameters and the pipeline structure parameters on fluid power flow were studied. The primary and secondary order of the influence of the space pipeline structure parameters was analyzed by using comprehensive scoring method and orthogonal experiment.The structure parameters of pipeline were optimized to reduce the maximum principal stress of pipeline by56.27%, and the design process of space pipeline with basic vibration was proposed. The result shows that the primary and secondary order of pipe structural parameters affecting the maximum stress and fluid power flow was curvature radius, wall thickness, and inner diameter. Among them, the curvature radius of 75 mm, wall thickness of 25 mm, and inner diameter of 5 mm were the best combination of structural parameters. In this paper, the analysis method proposed can provide reference for the design and selection of space pipe under foundation vibration.