calculation report for monorail and hatch cover rev.0

7/26/2019 Calculation Report for Monorail and Hatch Cover REV.0

1/15

COMPANY CONTRACTOR

BK-10

LIVING QUARTER

CALCULATION REPORT

FOR

MONORAIL AND HATCH COVER

0 24/11/09 Approved For Construction Cheon Jai KANG

A 22/07/09 Issued for Review Cheon Jai KANG AZIZI

Rev. DATE(DD/MM/YY)

Description of Revision Prepare ReviewSGNC Company G.L

Approved

Facilities:

Living Quarter

Scale:

None

Type of Document :

Calculation

Document identification

Project No. Discipline Document No. Rev.

BK-10 LQ STRUCTURE 0


2/15

Project : BK-10 LIVING QUARTER

Title : Calculation report For Monorail and

Hatch Cover

Doc.No : Revision 0

File name: Calculation report For Monorail and Hatch Cover Page 2of 15

CONTENTS

1. INTRODUCTION ............................................................ ................................................................... ............................ 3

1.1 General ............................................................ ................................................................... .................................................. 3

1.2 Plans and Documents ........................................................... ................................................................... ............................. 3

2. MONORAIL CRANE CALCULATION ...................................................................................................................... 4

2.1 Analysis model ......................................................... ................................................................... ......................................... 4

2.2 Boundary and loading condition ........................................................................................................... ............................... 5

3. MONORAIL CRANE ANALYSIS RESULTS .................................................................. ........................................... 6

3.1 Allowable criteria ................................................................ .................................................................. ............................... 6

3.2 Stress results......................................................................................................................................................................... 6

3.3 Deflection results ........................................................................... ................................................................... ................... 8

4. HATCH COVER CALCULATION ............................................................. ................................................................. 9

4.1 Analysis model ................................................................... ................................................................... ............................... 9

4.2 Boundary and loading condition .......................................................................................................... .............................. 10

5. HATCH COVER ANALYSIS RESULTS ............................................................... .................................................... 12

5.1 Allowable criteria .............................................................. ................................................................... .............................. 12

5.2 Stress results....................................................................................................................................................................... 12

5.3 Deflection results ......................................................................... ................................................................... ................... 14

6. CONCLUSION ............................................................. ................................................................... .............................. 15


3/15



Hatch Cover

Doc.No : Revision 0


1.INTRODUCTION

1.1 General

There are two items in miscellany calculation. One is monorail crane and other is hatch cover.

The monorail crane and hatch cover are calculated by Finite element analysis. The analysis models are

constructed by MSC Patran, and solved by MSC Nastran. The using element is plate element and averaging

element size is 60mm ~ 100mm.

1.2 Plans and Documents

The following plans and documents have been used in the analysis of monorail crane and hatch cover.

Table 1.2.1 Project Specification, Documents and Report

Ref Reference No. Title

1 BK10LQ-ST-D10-A-001 Structural design brief

BK10LQ-ST-W20-A-011 Hatch cover

3 BK10LQ-ST-W20-A-014 Monorail layout and detail

Table 1.2.2 Regulatory Codes and Standards

Ref Title Remark

4 AISC / API RP 2A


4/15



Hatch Cover

Doc.No : Revision 0


2. MONORAIL CRANE CALCULATION

2.1 Analysis model

For the analysis idealization of monorail crane, the model extent is selected maximum span area (4295mm)

and braces are skipped.

The maximum span area and analysis model is shown below Figure 2.1.1.

Figure 2.1.1 Model extend of monorail crane and analysis model


5/15



Hatch Cover

Doc.No : Revision 0


2.2 Boundary and loading condition

As show below Figure2.2.1, the end of upper flange of i-beam is Tx, Ty, Tz fixed. And web plate and lower

flange is Tx fixed.

The applied load is calculated as below.

Safety working load : 2 ton Dynamic amplification factor : 1.5 Input load = 2 ton x 1.5 = 3 ton (29430N)

Figure 2.2.1 Boundary & loading condition


6/15



Hatch Cover

Doc.No : Revision 0


3. MONORAIL CRANE ANALYSIS RESULTS

3.1 Allowable criteria

The allowable von-Mises stress and Shear stress is summarized Table 3.1.1.

Table 3.1.1 Allowable stress

Material Yeild stress (N/mm2)Allowable stress (N/mm2)

von-Mises stress Shear stress

SS400 230 230 92

3.2 Stress results

Table 3.2.1 is shown the stress results and Figure 3.2.1 ~ 3.2.4 are shown stress distribution of monorail crane.

Table 3.2.1 Stress results

Items MaterialActual stress Allowable stress (N/mm2)

Remarksvon-Mises stress Shear stress von-Mises stress Shear stress

Flange SS400 49.9 2.82 230 92 OK

Web SS400 38.3 13.7 230 92 OK

Figure 3.2.1 Von-Mises Stress of Flange


7/15



Hatch Cover

Doc.No : Revision 0


Figure 3.2.2 Shear Stress of Flange

Figure 3.2.3 Von-Mises Stress of Web


8/15



Hatch Cover

Doc.No : Revision 0


Figure 3.2.4 Shear Stress of Web

3.3 Deflection results

The maximum deflection is founded at midpoint of analysis model, the value is 1.78 mm. This is lower than

the allowable deflection value is 13.2mm (span 4295mm / 325), ref.[1].

Figure 3.3.1 is shown the deflection results.

Figure 3.3.1 Deflection result


9/15



Hatch Cover

Doc.No : Revision 0


4.HATCH COVER CALCULATION

4.1 Analysis model

The hatch cover analysis model is constructed by plate elements and averaging elements size is 60mm. The

model is shown below Figure 4.1.1.

Figure 4.1.1 Analysis model of Hatch cover


10/15



Hatch Cover

Doc.No : Revision 0


4.2 Boundary and loading condition

4.2.1 Boundary condition

The boundary condition is shown following Figure4.2.1.

Figure 4.2.1 Boundary condition


11/15



Hatch Cover

Doc.No : Revision 0


4.2.2 Applied load

The applied loads of hatch cover analysis are live load and gravity. The live load(5kN/m2) on hatch cover is

obtained from design brief, ref[1]. The Figure 4.2.2 is shown the applied loads on hatch cover model.

Figure 4.2.2 Applied load


12/15



Hatch Cover

Doc.No : Revision 0


5. HATCH COVER ANALYSIS RESULTS

5.1 Allowable criteria

The allowable von-Mises stress and Shear stress is summarized Table 5.1.1.

Table 5.1.1 Allowable stress

Material Yeild stress (N/mm2)Allowable stress (N/mm2)

von-Mises stress Shear stress

SS400 230 230 92

5.2 Stress results

Table 5.2.1 is shown the stress results and Figure 5.2.1 ~ 5.2.4 are shown stress distribution of cover plate and

frame.

Table 5.2.1 Stress results

Items MaterialActual stress Allowable stress (N/mm2)

Remarks

von-Mises stress Shear stress von-Mises stress Shear stress

Cover plate SS400 31.2 8.02 230 92 OK

UPN140 SS400 24 8.82 230 92 OK

Figure 5.2.1 Von-Mises Stress of Cover plate


13/15



Hatch Cover

Doc.No : Revision 0


Figure 5.2.2 Shear Stress of Cover plate

Figure 5.2.3 Von-Mises Stress of UPN140


14/15



Hatch Cover

Doc.No : Revision 0


Figure 5.2.4 Shear Stress of UPN140

5.3 Deflection results

The maximum deflection is founded at cover plate, the value is 1.82 mm. And the UPN140 is 0.6mm. This islower than the allowable deflection value is 7.69mm (span 2500mm / 325), ref.[1].

Figure 5.3.1~2 is shown the deflection results.

Figure 5.3.1 Deflection result of cover plate


15/15



Hatch Cover

Doc.No : Revision 0


Figure 5.3.2 Deflection result of UPN140

6. CONCLUSION

From the analysis results, the maximum von-mises stress of monorail crane is founded at upper flange, the

value is 49.9Mpa and the maximum shear stress is 13.7Mpa at web plate. And the maximum von-mises stress

of hatch cover is occurred at hatch cover plate, the value is 31.2Mpa and the maximum shear stress is

8.82Mpa at frame member UPN140. These values are lower than allowable stress as mentioned above chapter

3 and 5.

The maximum deflection value of monorail is 1.78 mm. This is satisfied to allowable criteria 13.2mm. And

the maximum deflection of hatch cover is founded at cover plate, the value is 1.82mm and the frames value

is 0.6mm. This is lower than the allowable deflection value is 7.69mm.

Based on the results of analysis, the monorail crane and hatch cover have sufficient structural strength undereach loading conditions.