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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。
Aiming at the problem that the strong vibration in the working process of the hard rock roadheader affects the working performance of the pipeline, a mathematical model of the lateral vibration of the fixedly supported conveying pipe at the two ends under the basic vibration is established. The Galerkin method and the equivalent bending moment method The stress is numerically solved and the correctness of the mathematical model is verified by experiments. The influence law of the fundamental vibration parameters on the maximum stress of the pipeline was studied. According to the maximum stress criterion, the normal-failure area of the pipeline under different basic vibration parameters was obtained. The pipeline resistance based on the flow-pressure-vibration parameters Vibration structure design method. The results show that the fundamental vibration can cause the stress of hydraulic pipeline to increase sharply and lead to its failure. The new design method can effectively improve the working performance of pipeline under strong vibration.