冗余驱动盾构机推进系统机液耦合模型及载荷特性分析

Hydraulic-mechanical Coupling Model and Load Characteristic Analysis of Shield Thrust System with Redundant Drive

针对某型盾构机推进系统分别建立了考虑冗余驱动的机械系统动力学模型和单组液压系统的简化液压模型,在此基础上建立了盾构机整个推进系统的机液耦合模型,给出基于外载-减压阀阀口开度关系的系统状态判定方法。在MATLAB/Simulink环境下进行数值建模与仿真,分析极端工况下各组推进缸的载荷特性。结果表明,该方法能够有效评价推进系统状态,并可为盾构机异质岩土掘进时驱动力分配的控制提供依据。

First, a dynamics model of mechanical structure considering redundant drive of a shield tunneling machane was presented, then a simplified model of single group hydraulic system was built, further a hydraulic--mechanical coupling model of the whole thrust system was established, and a method based on the relationship between external load and pressure relief valve opening was adopted to judge system state. To analyze the characteristics of thrust cylinder groups under extreme load, numerical simulation was run in MATLAB/Simulink environment. Results show that this method judges the thrust system effectively and is dependable basis for drive distribution control when shield tunneling machine thrust in heterogeneous soil.