輸液管道振動(dòng)分析的傳遞矩陣解
[Abstract]:As a common structure, pipeline system is widely used in many fields, such as aerospace, marine engineering, petrochemical engineering, biological engineering, nuclear power engineering, urban water supply and so on. Occupy an important position. The theoretical study of fluid-solid coupling in pipelines plays an important role in economic benefits and safety problems in engineering practice and has a wide engineering application background. In this paper, the transfer matrix method is used to study and analyze the stability of the pipeline system, and the effects of fluid velocity and supporting conditions on the results are discussed. Considering the scale effect of microfluid and microstructure, the equation of motion of micro-tube is modified, and the influence of these factors on the bending vibration of micro-transfusion tube is discussed. In this paper, the stability of transfusion tube is studied in the following parts: (1) the critical velocity of instability is calculated by using fine integral-transfer matrix to analyze the stability of the infusion tube with several classical boundary conditions. Compared with the results of previous literatures, the method is effective. (2) the stability of the pipeline with intermediate support is analyzed, and the stiffness of the spring and the position of the spring are discussed. The influence of the location of hinge support on the critical velocity of fluid transfusion tube instability. This study provides a theoretical basis for improving the safety and stability of the system and prevents the structural damage caused by vibration induced by flow in engineering. (3) the dynamic stiffness transfer matrix method is applied to analyze the stability of the micro transfusion tube. Considering the scale effect of microflow and microstructure, the equation of motion of micro-scale pipeline is improved, and on this basis, three kinds of transfusions with representative cross-section shape are analyzed. The dynamic stiffness transfer matrix method is used to analyze the vibration characteristics of the micro pipeline, and the influence of the microstructure and the micro fluid on the results is studied, which makes the study of the vibration characteristics of the micro transfusion tube more thorough and more comprehensive.
【學(xué)位授予單位】:華中科技大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2015
【分類號(hào)】:U173
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