Title

Analysis of Vertical Pressure Vessels: Effect of Decreasing Leg Length

Location

Presentation- Allen E. Paulson College of Engineering and Computing

Document Type and Release Option

Thesis Presentation (Archived)

Faculty Mentor

Aniruddha Mitra

Faculty Mentor Email

amitra@georgiasouthern.edu

Presentation Year

2021

Start Date

26-4-2021 12:00 AM

End Date

30-4-2021 12:00 AM

Keywords

Vertical pressure vessels, leg length

Description

Pressure vessels are used in a variety of industries for storing fluids needed by said industries. Industrial-sized pressure vessels are sometimes left outside of facilities rather than inside due to spacing issues. Tall structures such as vertical pressure vessels are susceptible to failure due to resonance between its natural frequency and the frequency of vortex shedding formed from wind. It was proposed that the natural frequency of a vertical pressure vessel could be increased by decreasing its legs’ lengths, thereby making it more difficult to achieve resonance. For the purpose of testing this hypothesis, two different pressure vessel types were used: a 50 ft3 model and a 200 ft3 model. Using SolidWorks, true-scale 3D models of the pressure vessels were generated. Each model type then had their leg lengths decreased in increments of 1 inch up to 4 inches in total. Using ANSYS, each model was subjected to modal analysis to observe the change in natural frequency based upon the changed leg lengths. Based upon the findings of these simulations, there does not seem to be a significant change in the natural frequency from the reduced leg length.

Academic Unit

Allen E. Paulson College of Engineering and Computing

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Apr 26th, 12:00 AM Apr 30th, 12:00 AM

Analysis of Vertical Pressure Vessels: Effect of Decreasing Leg Length

Presentation- Allen E. Paulson College of Engineering and Computing

Pressure vessels are used in a variety of industries for storing fluids needed by said industries. Industrial-sized pressure vessels are sometimes left outside of facilities rather than inside due to spacing issues. Tall structures such as vertical pressure vessels are susceptible to failure due to resonance between its natural frequency and the frequency of vortex shedding formed from wind. It was proposed that the natural frequency of a vertical pressure vessel could be increased by decreasing its legs’ lengths, thereby making it more difficult to achieve resonance. For the purpose of testing this hypothesis, two different pressure vessel types were used: a 50 ft3 model and a 200 ft3 model. Using SolidWorks, true-scale 3D models of the pressure vessels were generated. Each model type then had their leg lengths decreased in increments of 1 inch up to 4 inches in total. Using ANSYS, each model was subjected to modal analysis to observe the change in natural frequency based upon the changed leg lengths. Based upon the findings of these simulations, there does not seem to be a significant change in the natural frequency from the reduced leg length.