Dynamic Characteristic Analysis for Fluid-Conveying Pipe of TBM

Aiming at the influence of the strong vibration generated in the working process of the full-section hard rock tunneling machine on the response characteristics of the hydraulic straight pipe, according to the fluid-solid coupling theory and forced vibration theory, the transverse motion mathematical model of the straight pipe under the basic vibration was established. The model was solved by Galerkin method, and the correctness of the model was verified by experiments. The influence of foundation vibration parameters and fluid velocity on the response characteristics of straight pipe is analyzed by simulation. It is found that the vibration amplitude of straight pipe increases with the increase of foundation vibration amplitude and foundation vibration frequency. The higher the foundation vibration frequency, the smaller the liquid velocity is when the straight pipe resonates. At the same time, the working failure areas of straight pipe under different dimensionless velocity and fluid-pipe mass ratio are obtained. The research provides some theoretical basis for the vibration resistance design of TBM direct pipeline.

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