TBM液压管道频谱特性分析和结构优化

考虑到全断面硬岩推进机(TBM)掘进过程中轴向基础振动对流体流速和压力波动的影响,运用输流管道流固耦合轴向运动4-方程模型,分析基础振动的影响,建立轴向基础振动下的TBM液压管道轴向耦合振动方程组,并用直接解法在频域内对其进行求解,再运用MATLAB软件对管道出口处流速和压力的频域响应特性进行仿真计算,随之分析基础振动和不同结构参数对流体频域响应的影响规律。同时,为减弱基础振动对流体出口参数的影响,运用正交实验法对管道进行结构优化,优化后的管道系统流速的频域幅值整体上减小了48.61%,从而在一定程度上抑制了因基础振动带来的流体波动。

Frequency-spectrum Characteristic Analysis and Structure Parameters Optimization of TBM Hydraulic Pipelines

Abstract: Aimed at the influence on the fluid’s velocity and pressure fluctuation made by the axial foundation vibration in the TBM tunneling process, using the liquid-solid coupling axial motion 4-equation model, taking account of the foundation vibration, the axial coupling vibration equation of TBM hydraulic pipeline flowing in the environment of the axial foundation vibration is derived, and which is solved by direct solution method in frequency domain. Meanwhile the frequency response of velocity and pressure at the pipe outlet is analyzed by using Matlab tool, and the effect on the frequency response of fluid made by changes of foundation vibration and the structural parameters of pipe is studied. In order to weaken the influence of the axial foundation vibration on fluid fluctuation, applying the orthogonal experiment method to optimize the pipeline structure, the result of the optimized pipe system charity that frequency domain amplitude of velocity reduced by 48.61% on the whole, which inhibit the fluid fluctuation resulted from the axial foundation vibration to some extent.