TBM液压管道抗振结构设计方法

针对硬岩掘进机工作过程中产生的强烈振动影响管道的工作性能的问题,建立了基础振动下两端固定支撑输流管道横向振动的数学模型,运用Galerkin方法和等效弯矩法对管道最大应力进行了数值求解,并且用实验证实了数学模型的正确性。研究了基础振动参数对管道最大应力的影响规律,并根据最大应力判据条件得到了不同基础振动参数下管道工作的正常-失效区域,制定了以流量-压力-强振动参数为依据的管道抗振结构设计方法。结果表明:基础振动会引起液压管道应力剧增而导致其工作失效,新的设计方法能有效改善强振动环境下管道的工作性能。

Design method of anti-vibration structure for TBM hydraulic pipe

Against the problem that strong vibration has effect on the performance of hydraulic pipe during the working process of tunnel boring machine, the transverse vibration mathematical model of the clamped-clamped hydraulic pipe under the foundation vibration was built; The methods of Galerkin and equivalent bending moment were adopted to solve pipe's maximum stress, and the correctness of mathematical model was verified by experiments. The influence rule of foundation vibration parameters on pipe's maximum stress was researched and the normal-failure areas of pipe under different foundation vibration parameters were obtained on the basis of maximum stress criterion. The anti-vibration structural design method was developed based on flow-pressure-strong vibration parameters. The results indicate that foundation vibration causes dramatic increase of hydraulic pipe stress and thus leads to its performance failure, and the new design method can effectively improve the performance of pipe under the strong vibration environment.