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The Study on Vibration and Vibration Control of the Pipeline of Reciprocating Compressor

Author: XueZuoFei
Tutor: YangXiaoXiang
School: Fuzhou University
Course: Chemical Engineering
Keywords: Reciprocating compressors Piping Vibration Damping Finite element method
CLC: TH45
Type: Master's thesis
Year: 2003
Downloads: 676
Quote: 9
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Abstract


In the modern chemical industry, steel, oil and other corporate sector, reciprocating compressors due to the pressure range, high efficiency, adaptability and other advantages, while widely used. However, due to the reciprocating compressor suction and exhaust periodically so that the airflow within the export pipeline gas pulsation occurs. Gas pulsation is not only caused by the failure of the control instruments on the connecting pipes, valves conditions deteriorate, the volumetric efficiency of the compressor is reduced and pose threats to production safety, strong flow fluctuation, the pipeline violent vibration, ranging from causing leakage , weight by rupture and cause an explosion resulting in serious accidents, its research not only has an extremely important theoretical and practical significance, but also has significant economic and social benefits. In this paper, do the research work of the following aspects: a brief introduction to the development of the finite element method and the finite element method analysis of the general steps of the pipeline structure; and then combined with the characteristics of the pipeline structure system, think of it as by the different elements composition of these different components of the element stiffness matrix and element mass matrix, a total stiffness matrix and mass matrix of the piping system, the use of the Lagrange equation, the differential equations of motion of the pipeline structure. Application subspace iteration method and mode superposition method to solve differential equations of motion of the pipeline structure obtained the dynamic parameters of the natural frequency of the displacement of the pipeline structure. Of complex piping systems using finite element software ANSYS modal analysis and harmonic response analysis, have natural frequencies, mode shapes Figure displacement amplitude value and displacement response spectra. INV306 signal analyzer to the piping system were measured, the test results show that: the measured and calculated values ??is quite close. Air flow in the tube using the finite element method to solve the acoustic wave equation finite element equations of motion to calculate the natural frequency and airflow pressure pulsation tube column. Finite element method to the calculation example of simple pipe column, obtaining the natural frequencies and pressure pulsation value, compared with the value obtained using the transfer matrix method, the result is in good agreement; Then, the complex pipe column finite element analysis; drilling in complex pipe at the same time, pressure pulsation test; test results consistent with the calculation results, and mutual authentication test methods and the correctness of the calculation method. Description, evaluation methods and evaluation criteria of the pipeline pressure pulsation gives the allowable standard pipe vibration amplitude; consider from host design, pipeline design, attenuator, and the plate, vibration reduction and abatement of the pipeline, drawn to avoid air column resonance and the structural resonance method, cut pipeline pressure pulsation measures; application of these measures to transform the actual complex piping systems, damping purposes.

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CLC: > Industrial Technology > Machinery and Instrument Industry > Gas compression and transportation machinery > Compressors, compressor
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