tutorial of wrc 107 for lifting lugs

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Filename:document.xls

PROCEDURE OF WRC-107 CALCULATIONS FOR LIFTING LUGS(Horizontal vessels)

Sketch

Step 1

Import data from PV elite

Step 2

Step 3 In PV Elite, Click this button -->(To start design of lifting lug)

Step 4As Shown Below:

Note values from output file of PVElite, as shown below.

Open PVElite Input file

A new window "COADE CALC" will open, Go to Step 4

Lifting Lugs

F

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Step 5As shown below in sketch

Step 6

Step 7

Go to 'Analysis'→'Choose Analysis type'→'WRC 107 / FEA'

A new window will open. Click " +" new Item button

Give Description of item, select attachment type as "Rectangular" & select "solid" in

Hollow or Solid box

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Step 8window. If there is any pad attached also give its dimension.

Step 9

Also give dimensions of rectangular attachment by clicking ">>" button

In Vessel provide data for Vessel (from data sheet or Pv elite calculations) on which lifting lug is attached.

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Step 10 A Provide values in input cells in table 1 & take value of weight from step 1

Input Cell

Output Cells

Weight of Empty Vessel W = 5000 N

Impact Factor (generally 1.5) I = 18

Design Lifting Load (Total) W x I F = 90000 N

No. of Lifting Lugs n = 2

Thickness of lifting lug T = 10 mm

Length of lifting lug from centre of hole to centre of weld line d = 100 mm

Thickness of pad Tp = 10 mm

Half of the circumferential angle between Lugs. ө = 30 deg.

Load per Lug F / n = 45000 N

Radial Load, P = F x I / n = 45000 N

Circumferential Shear, VC = F (tan ө) / n = 25981 N

Longitudinal Shear, VL = 0.05 (F/n) = 2250 N

Longitudinal Moment, ML = P x d + VL (Tp + T/2) = 4533750 N-mm

Torsional Moment, MT = VC x d = 2598074 N-mm

Circumferential Moment, MC = VC (Tp + T/2) = 389711 N-mm

Table 1

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Step 10 B

Step 11

Step 12 Analyze

Step 13

Step 14

In Loads provide values from Step10A.

Save your file at required location.

Read at end of Report (as below)

If the results are " Fail", go to Step 8 & try with different geometrical dimensions.Unless you get "Passed" message

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File name:document.xls

PROCEDURE OF WRC-107 CALCULATIONS FOR LIFTING LUGS(Horizontal vessels)

Sketch

Step 1


Step 2




Open PVElite Input file


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Step 6

Step 7




Hollow or Solid box

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Step 9

Also give dimensions of rectangular attachment by clicking ">>" button

In Vessel provide data for Vessel (from data sheet or Pv elite calculations) on which lifting lug is attached.

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Input Cell

Output Cells


Impact Factor (generally 1.5) I = 1.5




Length of lifting lug from centre of hole to bottom. d = 55 mm



Table 1

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Step 10 B

Step 11

Step 12 Analyze

Step 13

Step 14

In Loads provide values from Step10A.



If the results are " Fail", go to Step 8 & try with different geometrical dimensions.Unless you get "Passed" message

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PROCEDURE OF WRC-107 CALCULATIONS FOR LIFTING LUGS(Vertical vessel)

Vertical lift

Step 1


Step 2




Open PVElite


VL= Longitudinal ShearVC= Circumferential Shear

VL

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Step 6

Step 7




Hollow or Solid box

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Step 9

Also give dimensions of rectangular attachment by clicking ">>" button in Rectangular attachment

In Vessel provide data for Vessel from Datasheet or output PVElite file.

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Input Cell

Output Cells






Length of lifting lug from centre of hole to center of weld line d = 55 mm




IN VERTICAL LIFTING

Radial Load, P = 0.05 x F / n = 2025 N

Longitudinal Shear, VL = F / n = 40500 N

Circumferential Shear , VC = 0.05 x F / n = 2025 N

MOMENT CALCUALTIONS (In Vertical Lifting)

Longitudinal Moment, ML = Pd + VL (Tp + T/2) = 751275 N-mm


Torsional Moment, MT = VC d 111375 N-mm

Step 10 B In Load provide values from Step 10A.

Table 1

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Step 11

Step 12 Analyze

Step 13

Step 14



If the results are Fail. Go to Step 8 & try again with different geometrical dimensions.

Unless you get "Passed" message

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PROCEDURE OF WRC-107 CALCULATIONS FOR LIFTING LUGS(Vertical vessel)Horizontal lift

Step 1


Step 2




Open PVElite


VC= Circumferential Shear

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Step 6

Step 7




Hollow or Solid box

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Step 9

Also give dimensions of rectangular attachment by clicking ">>" button infront of Attachment type box

In Vessel provide data for Vessel from Datasheet or PVElite output file.

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Input Cell

Output Cells






Length of lifting lug from centre of hole to center of weld line d = 55 mm




IN HORIZONTAL LIFTING

Radial Load, P = 0.05 x F / n = 2025 N

Longitudinal Shear, VL = 0.05 x F / n = 2025 N

Circumferential Shear, VC = F / n = 40500 N

MOMENT CALCULATIONS (In Horizontal Lifting)

Longitudinal Moment, ML = Pd + VL (Tp + T/2) = 141750 N-mm


Torsional Moment, MT = VC d = 2227500 N-mm

Step 10 B In Load provide values from Step 10A.

Table 1

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Step 11

Step 12 Analyze

Step 13

Step 14



If Results are Fail go to Step 8 and try again with different geometric specifications.

Unless you get "Passed" message

tutorial of wrc 107 for lifting lugs

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