TO PERFORM THE STRUCTURALANALYSIS ON WEDGE TYPE GATE VALVE AND ITS OPTIMIZATION USING FEA
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Transcript of TO PERFORM THE STRUCTURALANALYSIS ON WEDGE TYPE GATE VALVE AND ITS OPTIMIZATION USING FEA
IRJMST Vol 5 Issue 5 [Year 2014] ISSN 2250 – 1959 (0nline) 2348 – 9367 (Print)
International Research Journal of Management Science & Technology http://www.irjmst.com Page 188
TO PERFORM THE STRUCTURALANALYSIS ON WEDGE TYPE GATE
VALVE AND ITS OPTIMIZATION USING FEA
DR GURUDUTT SAHNI a, BALPREET SINGH b a (HOD & DGM (Design,Drawing& Development) LEADER VALVES LTD
JALANDHAR,PUNJAB,INDIA)&C Eng( INSTITUTION OF ENGINEERS
INDIA),[email protected]
b (SCHOLAR,DEPTT OF MECH ENGG (100101128373)
BEANT COLLEGE OF ENGG&TECH GURDASPUR,PUNJAB,INDIA)
ABSTRACT: STRESS ANALYSIS are
one of important consideration while
determining different properties of
valves. A model of each element of Gate
Valve is developed in SOLID WORKS,
and analyzed in ANSYS.
STRUCTURAL LOAD and STRESS
analysis are done by FEA using
ANSYS and validation is supported by
stress analysis using classical theory of
mechanics. Finally, the result obtained
from FEA software and classical
analytical theory is compared.MAIN
OBJECTIVES ARE
1.TO STUDY EFFECT OF
DIFFERENT STRUCTURAL LOAD
AND STRESSES ON WEDGE GATE
VALVE
2.TO SEE HOW STRUCTURAL
LOAD ANALYSIS HELPS IN
MODIFICATION IN DESIGN OF
WEDGE GATE VALVE.
KEYWORDS:WEDGE GATE
VALVE,STRUCTURAL
ANALYSIS,STRESS ANALYSIS
INTRODUCTION
A WEDGE Gate Valve,is a valve that
opens by lifting a round or
rectangular gate/wedge out of the path of
the fluid. The distinct feature of a gate
valve is the sealing surfaces between the
gate and seats
are planar. The gate faces can form
a wedge shape or they can be
parallel. Gate valves are sometimes
used for regulating flow, but many
are not suited for that purpose, having
been designed to be fully opened
orclosed. When fully open, thetypical
gate valve has no obstruction in the
flow path, resulting in very low
friction loss and when the gate valve
is closed there are many obstructions in
IRJMST Vol 5 Issue 5 [Year 2014] ISSN 2250 – 1959 (0nline) 2348 – 9367 (Print)
International Research Journal of Management Science & Technology http://www.irjmst.com Page 189
the flow path which in turn produces
high frictional losses.
PROBLEM IDENTIFICATION &
SOLUTION METHODOLOGY
The various components of the gate
valve as as follows:
VALVEBODY,VALVE
BONNET,GATE,STEM,HAND
WHEEL,WEDGE
MODULES OF PROJECT
Modeling: 3D models of critical
components of Gate Valves are
prepared using (SOLID WORKS). The
detailed dimensions are taken from its
2D drawings.
Importing 3d Model: - 3D model
prepared using SOLID WORKSis
imported into FEA software (ANSYS).
Preferences: 1.STRUCTURAL OR
STATIC analysis method is selected.
Pre-processing: 2.DEFINE ELEMENT
TYPE 3.APPLYMATERIAL
PROPERTIES
1.VALVE BODY (DETAILS
BEFORE MODIFICATION)
BOUNDING BOX
DIMENSIONS
406.0mm
744.5mm
618.0mm
PART MASS 242.0kg
PART VOLUME 3.082e+007 𝒎𝒎𝟑
MESH
RELAVANCE
SETTING
0
NODES 44443
ELEMENTS 22973
STUDY IS DIVIDED INTO TWO PARTS
BEFORE APPLYING MODIFICATION
AFTER APPLYING MODIFICATION
VALVE
BODY
IRJMST Vol 5 Issue 5 [Year 2014] ISSN 2250 – 1959 (0nline) 2348 – 9367 (Print)
International Research Journal of Management Science & Technology http://www.irjmst.com Page 190
STRUCTURAL LOAD (BEFORE
MODIFICATION)
NAME MINIMUM MAXIMUM
EQUIVALENT
STRESS
6.13e-002
MPA
157.6 MPA
MAXIMUM
PRINCIPAL
STRESS
-15.42 MPA 157.6 MPA
MIMIMUM
PRINCIPAL
STRESS
-60.11 MPA 21.28 MPA
DEFORMATION 0.0mm 0.3223mm
STRUCTURAL LOAD EFFECT ON
VALVE BODY(BEFORE
MODIFICATION)
STRUCTURAL LOAD EFFECT ON
VALVE BODY RESULT 2(BEFORE
MODIFICATION)
STRUCTURAL LOAD EFFECT ON
VALVE BODY RESULT 2 VIEW
2(BEFORE MODIFICATION)
IRJMST Vol 5 Issue 5 [Year 2014] ISSN 2250 – 1959 (0nline) 2348 – 9367 (Print)
International Research Journal of Management Science & Technology http://www.irjmst.com Page 191
HEADING TOWARDS
MODIFICATION WITH NEW
RESULTS
STRUCTURAL LOAD EFFECT ON
VALVE BODY RESULT 3 MESH
(BEFORE MODIFICATION)
PROBLEM FACED :
RIBS AND FILLETS were
applied on the certain zones of
body where the deformation
resulted out to be more
under simulation of the body.
FIGURE
1
NO OF RIBS AND POSITION
OF RIBS BEFORE
MODIFICATION
RIBS POSITION (BEFORE
MODIFICATION) FIGURE 1
& FIGURE 2
FIGURE 2
SOLUTION :
With the addition of the fillets
and ribs to the areas
subjected to extreme stresses
and deformations were
strengthened and due to
which
after these successful
modifications the magnitude
of stresses and deformation
was
actually decreased to certain
allowable limit
IRJMST Vol 5 Issue 5 [Year 2014] ISSN 2250 – 1959 (0nline) 2348 – 9367 (Print)
International Research Journal of Management Science & Technology http://www.irjmst.com Page 192
STRUCTURE RESULTS (AFTER
MODIFICATION)
NAME MINIMU
M
MAXIMU
M
EQUIVALEN
T STRESS
7.245e-
002MPA
143.7MPA
MAXIMUM
PRINCIPAL
STRESS
-5.871
MPA
163.0 MPA
MINIMUM
PRINCIPAL
STRESS
-39.62
MPA
32.58 MPA
DFORMATIO
N
0.0mm 9.857e-002
mm
SAFETY
FACTOR
1.74 N/A
CHANGES OBSERVED
MAXIMUM EQUIVALENT STRESS IN
BODY CHANGES FROM 157.6MPA TO
143.7MPA
MAXIMUM PRINCIPAL STRESS IN THE
BODY CHANGES FROM 157.57 MPA
TO163.0 MPA
MINIMUM PRINCIPAL STRESS IN THE
BODY CHANGES FROM 21.28 MPA TO
32.58 MPA
SAFETY FACTOR CHANGES FROM 1.58
TO 1.74
MAXIMUM DEFORMATION IN BODY
CHANGES FROM .3223mm TO .09857 mm
STRUCTURAL LOAD EFFECT ON
VALVE BODY (AFTER
MODIFICATION)
IRJMST Vol 5 Issue 5 [Year 2014] ISSN 2250 – 1959 (0nline) 2348 – 9367 (Print)
International Research Journal of Management Science & Technology http://www.irjmst.com Page 193
STRUCTURAL LOAD EFFECT ON
VALVE BODY RESULT 2(AFTER
MODIFICATION)
STRUCTURAL LOAD EFFECT ON
VALVE BODY RESULT 2 VIEW 2
(AFTER MODIFICATION)
STRUCTURAL LOAD
EFFECT ON VALVE BODY
RESULT 3 MESH (AFTER
MODIFICATION)
MODIFIED RIBS
DESIGN
FIGURE
1
IRJMST Vol 5 Issue 5 [Year 2014] ISSN 2250 – 1959 (0nline) 2348 – 9367 (Print)
International Research Journal of Management Science & Technology http://www.irjmst.com Page 194
AS WE CAN SEE CLEARLY DUE
TO ADDITION OF FILLETS AND
RIBS ACROSS THE AREAS
SUBJECTED TO EXTREME
STRESSES AND DEFORMATION
WERE STRENTHENED SO THAT
THEY CAN BEAR THE LOADS
WITHOUT DEFORMATION
CONCLUSION
1.WE CANCLEARLY SEE THAT
VALUE OF STRESS AND
DEFORMATION HAS DECREASED
TO GREAT AMOUNT BY APPLYING
FEA
2.STRUCTURALANALYSIS PLAYS
A VITAL ROLE IN CHECKING
BEHAIVOUR OF VALVE WITH
RESPECT TO DIFFERENT LOAD
CONDITIONS.
REFERNCES
1..Valve handbook by GH pearson
2.Fluids Handling Principles and
practice, 2nd
edition
3. Schweitzer, Philip A., Handbook of
Valves
4.Maliska, C. R., Computational Fluid
Mechanics and Heat Transfer, LTC
Editing, 2004 (in portuguese)
ADDITION OF FILLETS AND
RIBS ACROSS THE AREA OF
VALVE BODY
FIGURE
2
RIBS POSITION (AFTER
MODIFICATION) FIGURE 1
& FIGURE 2