摘要
依据平面波动理论,针对现有模型计算精度不足的问题对模型进行了修正,然后使用修正后的计算模型编制通用程序计算管路的气柱固有频率和气流脉动。借助有限元方法的离散思想,建立了往复压缩机管道振动模态及振幅分析的数学模型,提出了恰当的边界条件,利用有限元分析软件CAESAR对模型进行求解,获得了管道振动模态和振幅计算结果。应用上述方法对7M50-305/314型氮氢气压缩机级间管道系统进行了气体动力与结构动力的计算,并对管道系统各个位置的振幅进行了实际的测量。测量结果证实了修正后计算模型的正确性。
Based on the one-dimension wave theory, the model was modified which was proven to be closer to the actual situations, then the program was written in Fortran language to predict the amplitudes of the pulsed pressures and gas natural frequency. Based on the discretization method in FEM, the mathematical model for calculating the piping vibration of reciprocating compressors piping system is established, and proper boundary condi- tions are given. Then the structural modal and amplitude of the piping vibration are calculated with the FEMbased piping analysis software CAESAR Ⅱ Application of the above-mentioned method ,7M50-305/314 nitrogen hydrogen gas compressor piping system of the gas dynamic and structural dynamic was caleulationed, and piping systems in various locations of the amplitude of the actual measurements were made. Measured results confirm the correctness of the revised calculation model.
出处
《压缩机技术》
2010年第1期3-6,15,共5页
Compressor Technology
关键词
往复压缩机
气柱固有频率
气流脉动
管道振动
模态
振幅
reciprocating compressor
gas natural frequency
pressure pulsation
piping vibration
model
amplitude of vibration
