This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Crankshaft Torsional and Damping Simulation - An Update and Correlation with Test Results
Annotation ability available
Sector:
Language:
English
Abstract
In recent years, interests in crankshaft analysis are renewed due to crankshaft difficulties in nuclear standby engine generator sets and elsewhere. Difficulties are caused by either deficiency in analysis procedure or in the nature of the fast-start application, or both. The continuous upgrading of the engine rating is another factor. Several advanced torsional calculation methods were developed in the U.S. to cope with this crankshaft crisis. These new methods were needed as neither the classical Holzer-Forced Vibration method nor the conventional classification rules seem rigid enough to determine the magnitude of the safety margin. These obsolete methods are not capable of pinpointing where the failures would be.
Since 1983, PEI Consultants has been working actively in developing advanced torsional computer codes to simulate more closely what is actually happening in a shaft system. Several simulation codes were developed for the torsional and damping behaviors of an operating engine-generator system. This paper describes the mathematical derivation of the new codes and its good check with experimental results.
In addition to crankshaft torsional and damper simulation, the potential use of torsional response for engine combustion diagnosis is also revised. This paper, 861226-A, is a revised version of that presented in the September, 1986, Milwaukee meeting.
Recommended Content
Authors
Citation
Chen, S. and Chang, T., "Crankshaft Torsional and Damping Simulation - An Update and Correlation with Test Results," SAE Technical Paper 861226, 1986, https://doi.org/10.4271/861226.Also In
Crankshaft and Component Adequacy-Update of Analysis and Testing Developed for Nuclear Standby Engines
Number: SP-0714; Published: 1987-05-01
Number: SP-0714; Published: 1987-05-01
References
- “Crankshaft Torsional Simulation - an update and correlation with test results” Chen, Simon K. Dr. PEI Consultants Johnston Paul R. Dr. Failure Analysis Associates SAE Marine Seminar May 1985
- “Torsional Vibration Analysis Program (TORVAP),” Computer Aided Design Centre Madingley Road, Cambridge, UK CB3 0H8 June 1975 Comshare Inc. Ann Arbor, Michigan
- “Reliability Improvement of Medium Speed Diesels in Nuclear Standby Applications” Berlinger Carl. H. Murphy Emmett L. SAE 860887
- “Emergency Diesel Generator Crankshaft Failure Investigation Shoreham Nuclear Power Station” Failure Analysis Associates October 31 1983
- “Evaluation of Emergency Diesel Generator Crankshafts at Shoreham and Grand Gulf Nuclear Power Stations” FaAA April 1984
- Vibration Analysis for a Sound Generator Set Design Chen Simon K. September 1978
- “Lloyd's Register of Shipping: Guidance Notes on Torsional Vibration Characteristics of Main And Auxiliary Oil Engines” 1976
- “Rules for Building and Classing Steel Vessels” American Bureau of Shipping 1984
- “Standard Practices for Low and Medium Speed Stationary Diesel and Gas Engines,” Sixth Diesel Engine Manufacturers Association DEMA 1972
- “A Handbook on Torsional Vibration” Nestorides E.J. BICERA, Cambridge at the University Press 1958
- “Experimental Investigation in the Performance of the Thermohydro Dynamic Lubrication of Reciprocating Slider Bearing” Wang
- “Rule for the Calculation of Crankshaft for Diesel Engines” IACS/CIMAC