液压加载控制器设计及在岩土岩石中的应用

发布时间：2018-03-04 08:00

本文选题：岩土岩石工程　切入点：液压加载控制器　出处：《河北科技大学》2017年硕士论文　论文类型：学位论文

【摘要】：随着现代土木工程专业的发展,岩土岩石专业越来越多地采取土工室内试验的方式来测试岩土、岩石的各项物理性能和力学指标,进而指导工程监测和施工。三轴试验是其中占比相对较大的一个模块。而常用的三轴仪所需要的三向压力的加载都是由三台液压加载控制器来提供,这样三轴仪的三向主应力都能够由不同的液压加载控制器独立施加。这样液压加载控制器的控制部分以及其在三轴仪中的应用就成为了本文的研究重点。针对液压加载控制器控制模式、电控软件、控制面板电路、控制电路等问题,本文主要通过实验的方式,进行了液压加载控制器测量精度的软件控制方法探究,并分析了液压加载控制器的控制模式,进行了闭环动态控制试验验证。在液压加载控制器的应用研究部分,本文从其机械特性在三轴仪中的应用出发,进行了详细的三轴试验验证,并进行了误差分析。通过液压加载控制器的单片机控制,验证三轴仪在岩土岩石实验中的无超调条件下保证恒压输出存在的可行性。研究液压加载控制器在岩土岩石的本构模型中所起的作用。经过对以上问题的研究,在液压加载控制器的控制部分中确定采用液晶显示器、步进电动机、通过单片机控制。通过试验液压加载控制器在三轴仪中的应用与黄土自身的变形特性以及力学性能都是相符的,也就是说液压加载控制器的机械性能是基本能够满足岩土岩石工程实际中复杂的土体岩体应力状态的模拟和其力学性能试验测试的要求,整套试验仪器的稳定性是能够得到基本保证的。
[Abstract]:With the development of modern civil engineering specialty, more and more geotechnical and rock majors adopt the method of geotechnical laboratory test to test the physical properties and mechanical indexes of rock and soil. The triaxial test is one of the relatively large modules, and the triaxial pressure required by the triaxial apparatus is provided by three hydraulic loading controllers. In this way, the three direction principal stress of the triaxial instrument can be independently applied by different hydraulic loading controllers. Thus, the control part of the hydraulic loading controller and its application in the triaxial instrument have become the focus of this paper. Load controller control mode, Electronic control software, control panel circuit, control circuit and so on, this paper mainly through the experimental way, carried on the hydraulic load controller measurement precision software control method research, and analyzed the hydraulic load controller control mode, The closed-loop dynamic control test is carried out. In the application research part of hydraulic loading controller, the detailed triaxial test verification is carried out based on the application of its mechanical characteristics in the triaxial instrument. The error analysis is carried out. The single chip computer control system is controlled by hydraulic loading controller. The feasibility of ensuring the existence of constant pressure output under the condition of no overshoot in geotechnical rock experiments is verified. The role of hydraulic loading controller in the constitutive model of geotechnical rock is studied. In the control part of the hydraulic loading controller, the liquid crystal display, step motor, The application of hydraulic loading controller in triaxial instrument is consistent with the deformation characteristics and mechanical properties of loess itself. That is to say, the mechanical performance of the hydraulic loading controller is basically able to meet the requirements of the simulation of the stress state of the complex soil mass in the geotechnical engineering practice and the test of its mechanical properties. The stability of the whole set of test instruments can be basically guaranteed.
【学位授予单位】：河北科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU458

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