混凝土泵排量测量仿真及其S管的优化设计

发布时间：2018-06-02 23:15

本文选题：混凝土泵 + 排量测量　；参考：《太原科技大学》2015年硕士论文

【摘要】：在道路、桥梁和楼房等的建筑施工中,商品混凝土拌合场(站)与施工场地之间通常有一定的距离,要合理经济地安排施工设备的数量,在一定程度上取决于混凝土泵的泵送能力和混凝土搅拌运输罐车的运输能力。而混凝土泵的排量是一个关键参数,测量其排量又是获得决策支撑的关键技术之一。目前国内排量测量技术领域主要应用测量仪器或实验,研究新型测量方法也以实验为主,缺少一种排量测量数字仿真方法,为施工方与用户方提供产品制造流程中的监督工具,从而更早预测其排量,一定程度上减少了资金损失,间接地达到缩减排量测量成本的目的。再者,置于料斗中的S管,其设计方法与结构特征对混凝土的搅拌与泵送起到至关重要的作用。S管长期在充满混凝土的料斗中工作,高压混凝土对其各个方向的力的作用使其易磨损并出现冲击。基于键合图理论求解建立了混凝土泵主液压回路的功率键合图,找出系统的状态变量并建立了主液压系统的状态方程,利用数值仿真软件MATLAB导出混凝土泵主液压缸一次泵送的压力波形图,结合“有效位移”概念和活塞位移曲线得出混凝土泵一次推送实际排量,从而提前预测各种型号混凝土泵的排量;同时,利用分配机构的运动特点推导出S管的动力学特性;用ANSYS的参数化设计语言(APDL)工具对S管进行参数化建模并进行有限元静力分析;最后,利用ANSYS中的优化模块(/OPT)对S管进行了结构优化,有效减少了S管的体积,达到节省材料的目的。本文提出的混凝土泵排量测量方法是将数字仿真与“有效位移”概念相结合,通过键合图理论与计算机软件仿真实际泵送工况下的主油缸压力波动,通过对不同坍落度混凝土的测试,验证了该模型的精确性。
[Abstract]:In the construction of roads, bridges and buildings, there is usually a certain distance between the commercial concrete mixing yard (station) and the construction site. The quantity of construction equipment should be arranged reasonably and economically. To some extent, it depends on the pumping capacity of the concrete pump and the transport capacity of the concrete mixing tank truck. The displacement of concrete pump is a key parameter, and measuring its displacement is one of the key technologies to obtain decision support. At present, the measurement instruments or experiments are mainly used in the field of domestic displacement measurement technology, and the new measuring methods are also based on experiments, lacking a digital emulation method of displacement measurement, which provides supervision tools in the manufacturing process for both the construction and the users. Thus it can reduce the loss of capital and achieve the purpose of reducing the measurement cost indirectly. Furthermore, the design method and structural characteristics of the S pipe placed in the hopper play an important role in the mixing and pumping of concrete. The S pipe works in the hopper filled with concrete for a long time. The force of high-pressure concrete on each direction makes it easy to wear and impact. Based on bond graph theory, the power bond diagram of the main hydraulic circuit of concrete pump is established, the state variables of the system are found and the state equation of the main hydraulic system is established. The pressure waveform of the main hydraulic cylinder of concrete pump was derived by using the numerical simulation software MATLAB, and the actual displacement of concrete pump was obtained by combining the concept of "effective displacement" and piston displacement curve. Therefore, the displacement of various types of concrete pumps can be predicted in advance, and the dynamic characteristics of S pipe can be deduced by using the motion characteristics of the distribution mechanism. The parameterized modeling and finite element static analysis of S-tube are carried out by using the parametric design language of ANSYS. Finally, the structure of S-tube is optimized by using the optimization module of ANSYS / Opt, which effectively reduces the volume of S-tube. Achieve the purpose of saving materials. The method of displacement measurement of concrete pump proposed in this paper combines digital simulation with the concept of "effective displacement", and simulates the pressure fluctuation of main cylinder under actual pumping condition by bond graph theory and computer software. The accuracy of the model is verified by testing different slump concrete.
【学位授予单位】：太原科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU646

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