Compressor Vibration

Analytical Techniques for Evaluation of Compressor-Manifold Response

Paper No. 3

J. C. Wachel/F.

This paper discusses the types of vibration and stress problem encountered in reciprocating compressor-manifold piping systems and mathematical analysis methods and digital computer programs developed in the research sponsored by the Pipeline and Compressor Research Council of the Southern Gas Association. These techniques can be used to calculate natural frequencies, mode shapes, vibrational amplitudes, and dynamic stresses caused by acoustical and mechanical excitation forces in the system, and they have been used in the design of domestic and foreign compressor installations representing well over 10 million installed horsepower. Comparison of these predictions with experimental field results has shown that accurate estimates of dynamic stress and impending failures can be obtained.