ML20100P349
| ML20100P349 | |
| Person / Time | |
|---|---|
| Site: | Shoreham File:Long Island Lighting Company icon.png |
| Issue date: | 09/17/1984 |
| From: | Giuffra R AMERICAN BUREAU OF SHIPPING |
| To: | Yang R TRANSAMERICA DELAVAL, INC. |
| References | |
| OL-I-013, OL-I-13, NUDOCS 8412140143 | |
| Download: ML20100P349 (2) | |
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3 May 1984
.E N TS-3 Transamerica Delaval DSR-48 Diesel Engine /Generat.ar for Long Island Lighting Company Shoreham Plant Report on Crankshaft Torsional Stresses.
Transamerica Delaval Inc.
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Engine & Compressor Division 550 85th Avenue P. O. Box 2161 Cakland, CA 94621 Attention: Mr. Roland T. M. Yang
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Manager Applied Mechanics.
'*e have your letter of 3 April 1984 submitting copies of the above subject report for our review, and with regard thereto have to advise as follows:
3 We note from the submitted report that the torsional vibration stress in the crank-
/
shaft for the first mode 51s order critical speed (422 RPM) was expected to approach or exceed that permitted by the Rules for the submitted crankshaft material.
We further note from the submitted report that tests were conducted to determine the actual stresses in the crankshaf t, and that these tests indicated a substantial mar-gin of safety against fatigue failure due to torsional vibration.
Based on the submitted test data, and on submitted service experience with similar engines having similar torsional critical speed arrangements, we advise that we would have no objection to the submitted torsional critical speed arrangement for use on diesel generator sets on an ocean going vessel, insofar as our classification require-ments for marine service are concerned.
Three (3) copyias of the subject report, stamped to indicate our review, are being re-turned.
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'A R. I'.
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Very truly yours,
- a. O. '
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C. d. C.
f AMERICAN StlREAU OF SHIPPING CfCEIYED itCxuR MAY 071984 urcArt y, 3, 333333 Vice President ENGINEERING
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