Transcription of TORSIONAL VIBRATION PROBLEM WITH …
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TORSIONAL VIBRATION PROBLEM WITH …
Troy Feese is a Senior Project Engineerat Engineering Dynamics Incorporated(EDI), in San Antonio, Texas. He has morethan 17 years of experience performingtorsional VIBRATION , lateral critical speed,and stability analyses as well as evaluatingstructures using finite element methods. Healso conducts field studies of rotating andreciprocating equipment. Mr. Feese is alecturer at the EDI seminar and has writtentechnical articles and papers on TORSIONAL VIBRATION , lateral criticalspeeds, and balancing. He contributed toAPI Standard Feese received a BSME from The University of Texas atAustin in 1990 and has an MSME from UTSA. He is a member ofASME, VIBRATION Institute, and a registered Professional Engineerin the State Maxfield is an Engineer at TesoroRefining & Marketing Company, in Martinez,California. Since March 2005, he hasmanaged the prediction/prevention programfor the refinery ( VIBRATION , ultrasonics,thermography,lubrication,and reciprocatingcompressors). Under his leadership, theprediction program has seen an increase inreal finds and respect among the personnelwithin the refinery.
Figure14showsthemeasuredcurrentformotorphaseAat theVFD. Note that when the dynamic torque is high (after approximately100seconds),sidebandsappearoneithersideof
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