Lug Support Design

(1)

SUVIDYA INSTITUTE OF TECHNOLOGY SUVIDYA INSTITUTE OF TECHNOLOGY Mumbai : 400055

Mumbai : 400055

1 of 11 1 of 11

SAMPLE DESIGN CALCULATION - VESSEL SUPPORTED ON LUGS

REFE

REFERENRENCECE PREPRESSUSSURE VRE VESSESSEL EL DESDESIGN IGN MAMANUANUAL BL BY DY D.R.M.R.MOSS OSS - (P- (PROCROCEDUEDUCE 3CE 3-7, -7, #2)#2)

SEISMIC DESIGN - VESSEL SUPPORT OF LUGS

IN THIS CALCULATION, EFFECT DUE TO WIND LOAD IS IGNORED AS EUIPMENT IS

LOCATED WITHIN BUILDING. DESIGN CHEC! IS CONDUCTED FOR SEISMIC LOAD

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(2)

SUVIDYA INSTITUTE OF TECHNOLOGY

Mumbai : 400055

! of 11

SAMPLE DESIGN CALCULATION - VESSEL SUPPORTED ON LUGS

REFERENCE PRESSURE VESSEL DESIGN MANUAL BY D.R.MOSS - (PROCEDUCE 3-7, #2)

SEISMIC DESIGN - VESSEL SUPPORT OF LUGS

IN THIS CALCULATION, EFFECT DUE TO WIND LOAD IS IGNORED AS EUIPMENT IS

LOCATED WITHIN BUILDING. DESIGN CHEC! IS CONDUCTED FOR SEISMIC LOAD

CALCULATE FORCES

FIND OUT BASE SHEAR  ( V )

(A& '* '+ /01 0 IS4563-22)

SITE

MUM$AI INDIA

8ONE

III

8 2ONE

FA'TOR

0.1)

I

IMORTAN'E FA'TOR +Tab/3 , ) , IS:1"9&,!00!-

1 R

RESONSE REDU'TION FA'TOR +Tab/3 , % , IS:1"9&,!00!-

4 S$9/

A*ERAGE RESONSE A''ELERATION 'O,EFFI'IENT

!.5

'/. ).4.5 , IS:1"9& , !00! Soi/ , M3ium oi/ i3

A:

DESIGN HORI2ONTAL A''ELERATION SE'TRUM

A:

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6 I

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6 +Sa7-

0.01)

LATERAL FORCES  (F:)

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9)0 /b

HORI8ONTAL SHEAR PER LUG (V:)

V:

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!40 /b

VERTICAL FORCE  (F1)

F1

#

)0000.00 /b

VERTICAL SHEAR PER LUG (V1)

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SUVIDYA INSTITUTE OF TECHNOLOGY Mumbai : 400055

& of 11

SAMPLE DESIGN CALCULATION - VESSEL SUPPORTED ON LUGS

REFERENCE PRESSURE VESSEL DESIGN MANUAL BY D.R.MOSS - (PROCEDUCE 3-7, #2) SEISMIC DESIGN - VESSEL SUPPORT OF LUGS

ALL LUGS ARE MOUNTED OFF-CTR W.R.T PRICIPLE AIS

VERTICAL LOAD ON LUGS -- ( SIDE CONDITON ), (2)

2 * 15000 /b LONGITUDINAL MOMENT  ( ML) ML !.+a- 1"0000 /b.in CIRCUMFERENTIAL MOMENT  (MC) MC *8.+a- !""0 /b.in 2C4 H;!.G 1).1! in 2C2 E !&.00 in 24 $ !1.00 in 22 A !".00 in 4 !'1! ".0) in 2 !'!! 11.50 in 4 !1! 10.50 in 2 !!! 14.00 in

CALCULATE RADIAL LOAD  (;)

; &.ML4.'! 1)%49.&%9% /b

STRESS CONCENTRATION FACTOR TO BE FOLLOWED FOR WELD AT ATTACHMENT

2*9 H RATIO OF #ELD RADIUS TO ATTA'HEMNT !

! STRESS 'ON'ENTRATION FA'TOR F OR TENSION + 5,!0- 1.4

!< STRESS 'ON'ENTRATION FA'TOR FOR $ENDING +5,!0- 1.!

STRESS CONCENTRATION FACTOR TO BE FOLLOWED FOR WELD AT END OF PAD

*9% RATIO OF #ELD RADIUS TO ATTA'HEMNT 1

! STRESS 'ON'ENTRATION FA'TOR F OR TENSION + 5,!0- 1.5

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4 of 11 SAMPLE DESIGN CALCULATION - VESSEL SUPPORTED ON LUGS

REFERENCE PRESSURE VESSEL DESIGN MANUAL BY D.R.MOSS - (PROCEDUCE 3-7, #2) SEISMIC STRESS ANALYSIS

COMPUTE GEOMETRIC PARAMETER

A% E/ +; A%%$:=% A% E/ +; P$

R= > (D - %& ? %') 9 2 45.00 in R= > (D - %& ) 9 2 44.%5 in 0.%0% in % > %& 0.5 in )&.)40 "9.5 0.1%9 0.11% 0.&4 0.&1& 0.5!) 0.&%5 0.0)1 0.0&%

A% E/ +; A%%$:=% A% E/ +; P$

0.&!! 0.!)"

0.!%" 0.!!&

0.!!" 0.1%!

0.!") 0.!&1

COMPUTING STRESS FOR A RADIAL LOAD ( AT THE EDGE OF ATTACHMENT)

MEMBRANE F0/ VALUE FROM FIGURE

0.&!! @-47A 1."

0.!%" @-47B ).!

BENDING

0.!!" @-45A 0.045

0.!") @-45B M 9 ; 0.015

COMPUTING RADIAL LOAD AND MOMENTS ( AT THE EDGE OF ATTACHMENT)

MEMBRANE FORCES AND MOMENT

))9.9" /b

N !&0%.)9 /b

BENDING

%5&.%! /b.in

M (M9;); !51.!4 /b.in

COMPUTING RADIAL LOAD AND MOMENTS ( AT THE EDGE OF ATTACHMENT)

MEMBRANE STRESS CALCULATION

))9.9" 1&!).4" SI

N !&0%.)9 45)9.00 SI

BENDING

%5&.%! 10"5&.)0 SI

% > ( %&2_{? %'}2₎.@

2) 2)

COMPUTE EUIVALENT VALUE

N R= 9 ; N R= 9 ; M N (N R= 9 ;)  ; 9 R= (N R= 9 ;)  ;9 R= M (M N > !.N % > !.N % M > !<.M %2 > R= 9 % > R= 9 % 4 > C4 9R= 4 > 4 9R= 2 > C2 93R= 2 > 2 9R= 4 9 ₂ ₄ 9 ₂ 4. 4. 4 9 ₂ 4 $ ;+* N $ ;+* N < ;+* N < ;+* N  ;+* M  ;+* M  ;+* M  ;+* M $ ;+* N φ. < ;+* N  ;+* M 9 ;  ;+* M φ. 9 ;)  ; φ  / φ /

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5 of 11

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Mumbai : 400055

) OF 11 SAMPLE DESIGN CALCULATION - VESSEL SUPPORTED ON LUGS

REFERENCE PRESSURE VESSEL DESIGN MANUAL BY D.R.MOSS - (PROCEDUCE 3-7, #2) SEISMIC STRESS ANALYSIS

COMPUTE GEOMETRIC PARAMETER

A% E/ +; A%%$:=% A% E/ +; P$

R= > (D - %& ? %') 9 2 45.00 in R= > (D - %& ) 9 2 44.%5 in 0.%0% in % > %& 0.5 in )&.)40 "9.5 0.1%91111111 0.11% 0.&4 0.&1& 0.5!) 0.&%5 0.0)1 0.0&%

A% E/ +; A%%$:=% A% E/ +; P$

0.&!! 0.!)"

0.!%" 0.!!&

0.!!" 0.1%!

0.!") 0.!&1

COMPUTING STRESS FOR A RADIAL LOAD ( AT THE EDGE OF PAD)

MEMBRANE F0/ VALUE FROM FIGURE

0.!)" @-22A !.%

0.!!& @-22B ".5

BENDING

0.1%! @-23A 0.04)

0.!&1 @-23B M 9 ; 0.014

MEMBRANE FORCES AND MOMENT

1004.9) /b

N &1)&.%% /b

BENDING

%%0.4% /b.in

M (M9;); !&4.49 /b.in

MEMBRANE STRESS CALCULATION

1004.9) &014."9 SI N &1)&.%% "!!5."1 SI BENDING %%0.4% !40&".%1 SI % > ( %&2_{? %'}2₎.@ 2) 2)

COMPUTE EUIVALENT VALUE

N R= 9 ; N R= 9 ; M N (N R= 9 ;)  ; 9 R= (N R= 9 ;)  ;9 R= M (M N > !.N % > !.N % M > !<.M %2 > R= 9 % > R= 9 % 4 > C4 9R= 4 > 4 9R= 2 > C2 93R= 2 > 2 9R= 4 9 ₂ ₄ 9 ₂ 4. 4. 4 9 ₂ 4 $ ;+* N $ ;+* N < ;+* N < ;+* N  ;+* M  ;+* M  ;+* M  ;+* M $ ;+* N φ. < ;+* N  ;+* M 9 ;  ;+* M φ. 9 ;)  ; φ  / φ /

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Mumbai : 400055

% OF 11

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SUVIDYA INSTITUTE OF TECHNOLOGY Mumbai : 400055

" OF 11

SAMPLE DESIGN CALCULATION - VESSEL SUPPORTED ON LUGS

REFERENCE P*&&* V&& D&0/ M$$ < D0& R. M+&&

COMBINED STRESS ANALYSIS - LUG SUPPORT WITH REINFORCEMENT PAD (AT THE EDGE OF ATTACHMENT)

STRESS DUE TO

RADIAL LOAD , ;

MEMBRANE

1&!).4" 1&!).4" 1&!).4" 1&!).4"

N 45)9.00 45)9.00 45)9.00 45)9.00

BENDING

10"5&.)0 10"5&.)0 10"5&.)0 10"5&.)0 M &)1%."% &)1%."% &)1%."% &)1%."%

INTERNAL PRESSURE , P

!%0.00 !%0.00 !%0.00 !%0.00

1&5.00 1&5.00 1&5.00 1&5.00

5324.5 5324.5 5324.5 5324.5 42@.5 42@.5 42@.5 42@.5

COMBINED STRESS ANALYSIS - LUG SUPPORT WITH REINFORCEMENT PAD (AT THE EDGE OF RF PAD)

STRESS DUE TO

RADIAL LOAD , ;

MEMBRANE

&014."9 &014."9 &014."9 &014."9 N "!!5."1 "!!5."1 "!!5."1 "!!5."1

BENDING

!40&".%09)%% !40&".%09)%% !40&".%09)%% !40&".%09)%% M %&1).1!90&!& %&1).1!90&!& %&1).1!90&!& %&1).1!90&!&

INTERNAL PRESSURE , P

!%0 !%0 !%0 !%0

1&5 1&5 1&5 1&5

4@7.6 4@7.6 4@7.6 4@7.6 27323. 27323. 27323. 27323. NOTES

1. ALL STRESS *ALUE IN A$O*E TA$LE IS IN SI.

!. INTERNAL DESIGN RESSURE 'ONSIDERED IN A$O*E 'AL'ULATION IS &.0 $ARG RESULT

MA<IMUM ALLO#A$LE TENSILE STRESS : S :!0000 SI FOR SHELL MATERIAL #ELD =OINT EFFI'IEN'> : 1.0

ALLO#A$LE LIMIT FOR 'OM$INED STRESS IN 'ASE OF SEISMI' LOADING : 1.5 . S. E ? &0000 SI ALL STRESS ARE WELL WITHIN LIMIT H ENCE DESING IS SAFE

 _6 _45 _27 _ _6 _45 _27 N M P. R= 9 %& P. R= 9 2 %& T+%$  _6 _45 _27 _ _6 _45 _27 N M P. R= 9 %& P. R= 9 2 %& T+%$ δφ δφ  δφ >  >  δφ >  >

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SUVIDYA INSTITUTE OF TECHNOLOGY

9 OF 11

SAMPLE DESIGN CALCULATION - VESSEL SUPPORTED ON LUGS

DESIGN OF LUG SUPPORT MEMBERS

:

HEIGHT

OF

LUG

SUORT

!&.00 in



+$'D

,

SHELL

OD-



!

1!.00 in

<

3 ;

M

14.50 in

%<

THI'(NESS

OF

$ASE

LATE

1.00 in

%

THI'(NESS OF 'OMRESSION LATE , NOT RO*IDED

0 in

ANGLE OF 'ONTA'T

)1 37



DISTAN'E $ET#EEN '.L. OF GUSSET

15.5) in

l

LENGTH

OF

$ASE

LATE

1%.00 in

%/

GUSSET

THI'(NESS

0.5) in

%&

SHELL

THI'(NESS

0.5 in

%'

THI'(NESS

OF

R.F.

AD

0.5 in



NO.

OF

GUSSETS

ER

LUG

! No

(INDL> NOTE THAT #E HA*E NOT IN'LUDED 'OMRESSION LATE AND HEN'E

DIMENSION @ AND  IS NOT ALI'A$LE

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Mumbai : 400055

10 OF 11

SAMPLE DESIGN CALCULATION - VESSEL SUPPORTED ON LUGS

DESIGN OF GUSSETS AND BASE PLATE

7 ASSUMED THI'(NESS OF GUSSETS 0.5) in

 *ERTI'AL LOAD ON LUG , REFER AGE & FOR ! 15000 /b

ANGLE OF 'ONTA'T )1 37.

a 1&110.0 /b

b %!)0.0 /b

' ).&4 in

A 7. ' &.55

F >IELD STRESS OF GUSSETS &)000 SI

Fa ALLO#A$LE A<IAL STRESS : 0.4 . F 14400 SI

Fb ALLO#A$LE $ENDING STRESS : 0.). F !1)00 SI

2 &.%5

Mb bnA 10!!."% /b.in

fa an.A 1"4%.0" SI

fb Mb2 !%!."9 SI

DESIGN OF BASE PLATE

$ $EAM SUORT #IDTH UNDER $ASE LATE ) in

DISTAN'E $ET#EEN T#O GUSSETS 15.00 in

$OLTHOLEDIAMETER 0.9" in

BENDING MOMENT IN TENSION  (M<)

M< 4!500 /b.in

UNIFORM BEARING LOAD ON BASE PLATE  ()

 14%.0) SI . SIN θ . 'OS θ b. SIN θ / 2 in! 7. '!_₎ _in&

INDU'ED A<IAL AND $ENDING STRESS ARE #ITHIN LIMIT AND HEN'E RO*IDE D GUSSETS THI'(NESS IS ADEUATE

l4

.l / 6

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SUVIDYA INSTITUE OF TECHNOLOGY M=<$0 -  @@

11 of11

SAMPLE DESIGN CALCULATION - VESSEL SUPPORTED ON LUGS

DESIGN OF GUSSETS AND BASE PLATE

BENDING MOMENT DUE TO BEARING LOAD

M<

&&0"."! /b.in

M<

GREATER MOMENT FROM TENSION OR $EARINGG

4!500 /b.in

REUIRED BASE PLATE THIC!NESS  (%<)

bB

0.9&5 in

%<

RO*IDED

$ASE

LATE

THI'(NESS

1.00 in

HENCE DESIGN IS SAFE

,6,6,6,

C.

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1 !