ANSYS在多列往复压缩机轴系扭振分析中的应用

随着石油化工流程规模的不断扩大，往复压缩机向超大型多列方向发展。压缩机列数的增加，导致轴系扭转固有频率降低，轴系出现扭转振动的可能性变大；经验表明，研制6列以上大型往复压缩机，必须进行轴系扭振分析。有限元技术的发展，为压缩机轴系的动力分析提供了新的解决方案。以6M50型往复压缩机为分析对象，利用ANSYS软件对轴系进行了静力分析、模态分析和动态响应分析。结果表明，该分析技术可以全面系统地分析轴系各项动力特性，可以直观准确地获得轴系不同部位、不同时刻的应力分布，为大型往复压缩机轴系设计提供可靠的理论依据。

Crankshaft Torsional Vibration Analysis of Multi-cram Reciprocating Compressor with ANSYS

With the enlargement of scale of petro-chemistry, there is a growing trend that reciprocating compressor develops towards large scale and multi-crank. The natural frequency of crankshaft torsion decreases with the increasing amount of crank of compressor, which also extend the possibility of torsional vibration. General experience shows that it is necessary to analyze the crankshaft torsional vibration for 6M reciprocating compressor. Some new methods are utilized for the dynamics analysis of crankshaft in compressor with the development of FEM. By virtue of ANSYS ,6M50 reciprocating compressor is discussed with the respect of static, mode and dynamic analysis. The results reveal that such analysis technology is capable of full-scale analyzing various dynamic characteristic of crankshaft and obtaining direct and precise stress distribution in different time and areas, which provide efficient theoretical support to the compressor design.