International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 11 Issue: 06 | June 2024
p-ISSN: 2395-0072
www.irjet.net
Three Meter Antenna Structural Design and Analysis. Part 1: Wind Analysis Om Gadhave1, Mr. Manish Patil (Guide)2 1Department of Mechanical Engineering,
2Goverment college of engineering and research Avasari (kh), 3Giant Metrewave Radio Telescope (GMRT) Khodad, (NCRA)-(TIFR). ---------------------------------------------------------------------***---------------------------------------------------------------------
Abstract - This research focuses on the wind analysis of a
Additionally, wind analysis involves evaluating aerodynamic forces such as drag and lift. Drag force, acting parallel to the direction of the wind flow, opposes the motion of the dish through the air. Lift force, perpendicular to the wind flow, results from differences in air pressure above and below the dish's surface. These aerodynamic forces play a pivotal role in determining the dish's stability and structural response to wind loading.
Three-meter Antenna, specifically examining the dish component. Utilizing ANSYS software, wind tunnel simulations were conducted to determine the drag and lift forces acting on the antenna dish. A detailed model of the antenna dish was created using SolidWorks software. The primary objective of this analysis was to quantify the drag and lift forces under varying angles of the antenna and different wind velocities. The findings from this study provide valuable insights into the structural behavior of the antenna under wind loading conditions, aiding in its optimization and performance enhancement.
By comprehensively studying the aerodynamic forces, engineers can anticipate potential structural vulnerabilities and devise strategies to mitigate them. Furthermore, wind analysis aids in optimizing the dish's design to enhance its performance and longevity under varying wind conditions. This comprehensive approach ensures that antenna dishes not only meet safety standards but also exhibit robustness and reliability in their operational environments.
Key Words: Wind Analysis, Drag Force, Lift Force, Wind Tunnel Simulation, Three-meter Antenna dish.
1.INTRODUCTION
1.1 Purpose of the project
Wind analysis stands as a cornerstone in the realm of structural engineering, particularly concerning the design and evaluation of critical components like antenna dishes. This project delves into a comprehensive wind analysis of a Three-meter Antenna Dish, utilizing advanced computational tools such as ANSYS Fluent software. The primary objective is to quantify the drag and lift forces acting on the dish under diverse wind velocity (20 kmph to 90 kmph) and at different positions of dish in tunnel (0 degree to 90 degree), crucial for ensuring its structural integrity and operational reliability.
The purpose of this project is to conduct comprehensive structural design and analysis of a three-meter antenna and its accompanying dish. This antenna holds significant potential for a multitude of applications, particularly in the realm of astronomical observations and Radio Frequency Interference (RFI) measurements. By harnessing its capabilities, we can delve into the depths of space, capturing invaluable data for astronomical research. Additionally, its precise design enables accurate RFI measurements, contributing to the mitigation of interference in radio astronomy observations. In summary, this project seeks to develop a versatile antenna system capable of facilitating groundbreaking astronomical observations while effectively addressing challenges posed by RFI, thereby advancing our understanding of the universe and enhancing the efficiency of radio astronomy endeavors
Antenna dishes, integral to communication systems, endure continuous exposure to environmental forces, with wind being a significant factor. Understanding the intricate interplay between wind and antenna dishes is imperative for guaranteeing their longevity, reliability, and optimal performance.
1.2 Geometry details of Antenna Dish
One of the key parameters studied in wind analysis is pressure distribution across the surface of the antenna dish. Wind exerts pressure on the dish, creating variations in pressure across its surface. These pressure differentials can lead to localized stress concentrations, potentially compromising the dish's structural integrity. By mapping out pressure distributions, engineers can identify critical areas prone to high stress and develop strategies to mitigate potential failure modes.
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Antenna dish is designed with following parameters: 1. F/D ratio: 0.35 2. Diameter (D): 10.00 feet = 3048.00 mm 3. Base-plate diameter at dish-center: 1.00 feet = 304.80 mm 4. Number of support arms in the dish: 12
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