International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 09 Issue: 07 | July 2022
p-ISSN: 2395-0072
www.irjet.net
Numerical Analysis of Pressure Vessel Saddle Support Subjected to Various Loading Conditions Harshana S1, Anjali Sudhakar2 1M.
TECH. (Structural Engineering) Student, Department of Civil Engineering, Younus College of Engineering and Technology, Kollam, Kerala, India 2 Assistant Professor Department of Civil Engineering Younus College of Engineering and Technology, Kollam, Kerala, India ---------------------------------------------------------------------***---------------------------------------------------------------------
Abstract - Pressure vessels are closed containers used to
Details of saddle design were taken from Megyesy and analysis was done in ANSYS. The effect of changing the load & various geometric parameters were investigated. The highly stressed area beside the pressure vessel at the saddle horn is the flange plate. Value of 0.25 for ratio of distance from tangent line to saddle center to the length from tangent-to-tangent line of pressure vessel generates minimum stress. Slenderness ratio less than 16 found to generate minimum stresses. [2]
hold fluids at a pressure which is different from surrounding pressure. A cylindrical pressure vessel which is oriented horizontally is known as horizontal pressure vessel. This type of pressure vessel is supported by using saddle supports at two ends of the vessel. Therefore, the most severely stress affected area of a horizontal pressure vessel is the contact area between saddle support and the pressure vessel, which is named as saddle horn area and the major weight of this pressure vessel rests on its saddle support. This paper mainly focuses on numerical analysis of saddle support subjected to various loading conditions. The loading conditions considered here are the wind load, seismic load, internal pressure and its combinations and Finite Element Analysis (FEA) using ANSYS software is conducted. The saddle support is modelled and analyzed in ANSYS software. The results obtained from the study are utilized for further study.
Existing design of saddle support is gathered from Design hub. Redesign 3D model of saddle support is constructed in SOLIDWORKS 2017. 3D model was redesigned by using different materials such as alloy steel, 1023 carbon steel sheet and AISI 347 annealed stainless steel and also by adding different number of ribs such as 2, 4, and 6. 10-ton force was applied to each saddle (20-ton force in total) and static analysis was conducted. Optimized model was simulated by Von Misses stress. The most suitable material for 6 ribs saddle support applied for future usage is AISI 347 stainless steel. [3]
Key Words: Saddle support, Saddle horn area, Finite Element Analysis, ANSYS, ASME
1. INTRODUCTION
1.1 Objectives
Pressure vessels are closed containers used to hold fluids at a pressure which is different from surrounding pressure. A cylindrical pressure vessel which is oriented horizontally is known as horizontal pressure vessel. This type of pressure vessel is supported by using saddle supports at two ends of the vessel. Therefore, the most severely stress affected area of a horizontal pressure vessel is the contact area between saddle support and the pressure vessel, which is named as saddle horn area and the major weight of this pressure vessel rests on its saddle support. The stress affected zones in saddle support due to wind load, seismic load, internal pressure and its combinations on saddle support is analyzed.
To carryout FEA of saddle support using ANSYS based on various loading conditions. To determine the stress affected zones in saddle support.
1.2 Scope of Work
The stress distributions at various parts of pressure vessel saddle support are calculated using ANSYS software. SA 516 Gr 70 material was used. Maximum localized stress arises at the saddle to vessel interface near the saddle horn area. The maximum value of stress at saddle horn is 206.84 MPa, which is below the safe value of 221 MPa given by Von Misses stress criteria for the present horizontal cylindrical vessel and its saddle support model.
Welded connection for parts of saddle support is considered as bonded contact. Bolted connection for base plate is considered as fixed. Pressure vessel is not designed.
[1]
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2. INPUT DATA 2.1 Model A three ribbed model of saddle support is developed in ANSYS on the basis of Process Industry Practices using following details:
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