基于一体化模型的往复式压缩机管线系统振动分析

Integrated Vibration Model Analysis on Reciprocating Compressor Pipeline System

传统的压缩机及管线系统振动分析与控制的方法是建立非完整模型开展局部减振技术研究，难以对系统整体振动能量分布进行描述。为此，本文基于Hamilton变分原理、微分方程的等效积分法，运用弹性力学理论，采取有限元的方法建立了系统的动力学一体化模型，并以此为基础进行了振动分析，对比发现分析计算结果与现场测试数据基本吻合，从而证明了所建立的一体化模型合理。以此一体化模型为基础进行振动控制方案设计，计算验证发现，采取控制方案的管系振动位移最大降幅达91．5％，最大振动位移在181—291μm之间，振动能量分布更趋均匀，从而证明了这种基于一体化模型的有限元分析方法是进行往复式压缩机管线系统振动控制的一种有效途径。

Vibration analysis and control methods in conventional compressor and pipeline system research mostly set up by nonholonomic model to carry out the local vibration reduction technology, which causes difficulty to describe the whole system＇ s vibration energy distribution. For this reason, this article established a system integration dynamics model based on Hamilton variational principle, the differential equation of the equivalent integral method, the theory of elastic mechanics and finite element method. Besides, vibration analysis was made on the basis of previous work, which shown, comparing with the analysis and calculation results on the field test data, that the established integrated model is reasonable. By designing the vibration control scheme based on the integrated model, computing validation showed that the amplitude of pipeline system reduced nearly 91.5 %, while the maximum vibration displacement between 181 - 291 μm, which turns out that the vibration energy distributes more balance. This finite element analysis method of integration model was an effective way to vibration control in the piping system which connected to reciprocating compressor.