ML20100P349: Difference between revisions

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| number = ML20100P349
| number = ML20100P349
| issue date = 09/17/1984
| issue date = 09/17/1984
| title = Intervenor Exhibit I-13,consisting of RA Giuffra to Rt Yang Re Crankshaft Torsional Stresses Rept
| title = Intervenor Exhibit I-13,consisting of RA Giuffra to RT Yang Re Crankshaft Torsional Stresses Rept
| author name = Giuffra R
| author name = Giuffra R
| author affiliation = AMERICAN BUREAU OF SHIPPING
| author affiliation = AMERICAN BUREAU OF SHIPPING
Line 17: Line 17:


=Text=
=Text=
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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.
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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.
Transamerica Delaval Inc.
)     Engine & Compressor Division 550 85th Avenue                                                                                                             ,
)
P. O. Box 2161 Cakland, CA 94621 Attention: Mr. Roland T. M. Yang
Engine & Compressor Division 550 85th Avenue P. O. Box 2161 Cakland, CA 94621 Attention: Mr. Roland T. M. Yang
)                                                                         Manager Applied Mechanics.
)
      '*e
Manager Applied Mechanics.
      -    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:
'*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-
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.
/
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.
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.                                                             -
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.                                         ,
Three (3) copyias of the subject report, stamped to indicate our review, are being re-turned.
*'I
'A R. I'.
M. H. t..
Very truly yours,
Very truly yours,
                                                                                              *'I        'A R. I'.      M. H. t..
: a. O. '
: a. O. '     g, y, y.       C. d. C.
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AMERICAN StlREAU OF SHIPPING                 CfCEIYED f
C. d. C.
y, 3, 333333                 itCxuR MAY 071984              urcArt Vice President ENGINEERING 4
f AMERICAN StlREAU OF SHIPPING CfCEIYED itCxuR MAY 071984 urcArt y, 3, 333333 Vice President ENGINEERING
(* TO FILIs.C:RC. (CRwApo
(* TO FILIs.C:RC. (CRwApo cyy
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Legs 1 Dept. (M. Adams)
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143 840917
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Latest revision as of 05:26, 13 December 2024

Intervenor Exhibit I-13,consisting of RA Giuffra to RT Yang Re Crankshaft Torsional Stresses Rept
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)
v • d • e


Text

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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.

)

Engine & Compressor Division 550 85th Avenue P. O. Box 2161 Cakland, CA 94621 Attention: Mr. Roland T. M. Yang

)

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.

  • 'I

'A R. I'.

M. H. t..

Very truly yours,

a. O. '

g, y, y.

C. d. C.

f AMERICAN StlREAU OF SHIPPING CfCEIYED itCxuR MAY 071984 urcArt y, 3, 333333 Vice President ENGINEERING

(* TO FILIs.C:RC. (CRwApo cyy

  • ggg yg 4

ec:

LILCO. (E. Montgomery) by:,

J

)

1 Accounting Dept w/ enclosure Robert A. Giuffrgj i

Legs 1 Dept. (M. Adams)

Principal Surveyor - Machinery Subject Tile 460 A 4 <i,r o R.A.4 # s14 vg6tp.;Nt fit.ad3 t3*: Oas t actsgsg eg;ge;.ma 1'0-181 3:44 't6t s s alttee sea 212399 wus elellt

)

143 840917

$$h2;gges 03xoggy G

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