岩石高压三轴试验机的液压加载系统关键技术研究

发布时间：2018-06-14 01:07

本文选题：高压液压系统 + Sim-Hydraulic仿真　；参考：《工程地质学报》2017年02期

【摘要】：为模拟岩体地应力与环境水等赋存条件,需开发一套能模拟多种溶液环境的岩石高压三轴试验机。设计了一套同时驱动四压力室的高压液压系统,并对该试验系统的增压方法、连接结构密封、溶液隔离等关键技术进行研究。设计了一级增压结构,为系统提供超高围压;提出T型-斜面密封圈结构设计,增强结构连接处静态密封性能;并设计安装管道隔离膜,将压力室赋存溶液与增压缸相隔离。最后提出采用同等控制结构增强系统同步性能以及使用自适应Fuzzy-PID控制算法增强系统稳定性,并通过MATLAB/Sim-Hydraulic液压仿真模块对所设计的液压加载系统进行仿真模拟,分别分析了自适应Fuzzy-PID算法下同等控制与主从控制液压缸的响应速度,并对比了PID控制和自适应Fuzzy-PID控制下系统的抗干扰性能。研究为类似岩石高压三轴试验机液压加载系统设计提供了参考。
[Abstract]:In order to simulate the occurrence conditions of rock mass such as ground stress and environmental water, a set of high pressure triaxial testing machine for rock can be developed to simulate various solution environments. A high pressure hydraulic system is designed to drive four pressure chambers at the same time. The key technologies of the test system, such as pressurization method, connection structure seal, solution isolation and so on, are studied. The first stage pressurized structure is designed to provide the system with super high confining pressure; the structure design of T-inclined seal ring is proposed to enhance the static sealing performance of the structural connection; and the installation of the isolating film of the pipeline is designed to isolate the pressure chamber storage solution from the pressurized cylinder. Finally, using the same control structure to enhance the synchronization performance of the system and using the adaptive Fuzzy-PID control algorithm to enhance the stability of the system, and simulating the designed hydraulic loading system by MATLAB / Sim-Hydraulic hydraulic simulation module. The response speed of the same control and master-slave control hydraulic cylinder under the adaptive Fuzzy-PID algorithm is analyzed, and the anti-interference performance of the system under the pid control and the adaptive Fuzzy-PID control is compared. The research provides a reference for the design of hydraulic loading system of rock high pressure triaxial testing machine.
【作者单位】：中山大学工学院;中山大学岩土工程与信息技术研究中心;中山大学海洋学院;
【基金】：国家自然科学基金重点项目(41530638);国家自然科学基金科学仪器基础研究专项(41227002);国家自然科学基金面上项目(41372302,41472257) 中山大学重大项目培育和新兴、交叉学科项目(15lgjc14)资助
【分类号】：TU45

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