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All Journal INTERNATIONAL JOURNAL OF MECHANICAL COMPUTATIONAL AND MANUFACTURING RESEARCH
Fauzi, AH Fauzi
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Automotive Engineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Electrical & Electronics Engineering Mechanical Engineering

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Study of the effect of wind direction on ship helideck using computational fluid dynamics Fauzi, AH Fauzi; Silalahi, NH Silalahi
International Journal of Mechanical Computational and Manufacturing Research Vol. 13 No. 4 (2025): February: Mechanical Computational And Manufacturing Research
Publisher : Trigin Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35335/computational.v13i4.235

Abstract

The safety and aerodynamic stability of a ship's helideck is a crucial factor in maritime flight operations, especially in variable wind conditions. One of the main challenges is the interaction between the airflow and the ship's structure which can create turbulence and recirculation zones that affect the stability of the helicopter during takeoff and landing. This study aims to analyze the airflow characteristics around the ship's helideck at various wind incidence angles using the Computational Fluid Dynamics (CFD) method. The simulation model includes ship and helideck geometry modeling, with boundary conditions set at 1 atm atmospheric pressure, 298 K temperature, and 10 m/s wind speed at angles of 0° to 180°. The simulation results show that the maximum pressure occurs at a 90° angle, while the maximum velocity of the airflow is recorded at a 0° angle. Recirculation zones and air vortices are significantly formed at small angles such as 150°, which can destabilize the helicopter. These findings emphasize the importance of helideck design optimization and aerodynamic mitigation strategies to improve flight safety. The limitation of this study lies in the lack of quantitative measurement of the intensity of the vortex, so further research is recommended to integrate experimental validation and more complex turbulence models to strengthen the reliability of the results.
Structural analysis of the Wing of UCAV (Unmanned Cargo Aerial Vehicle) using finite element method Fauzi, AH Fauzi; Pratama, Muhammad Rizky; Silalahi, NH
International Journal of Mechanical Computational and Manufacturing Research Vol. 14 No. 2 (2025): August: Mechanical Computational And Manufacturing Research
Publisher : Trigin Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35335/computational.v14i2.273

Abstract

This study analyzes and optimizes the wing structure design of an Unmanned Cargo Aerial Vehicle (UCAV) using the Finite Element Method (FEM). The initial structural assessment shows that the maximum stress of 566.83 MPa occurs at the wing root, resulting in a minimum safety factor of 0.67 which is well below the acceptable threshold of 1.8, as defined by the C.A.S.A Australia Subpart C standard. The maximum displacement amplitude was recorded at 3.81 mm, indicating potential structural failure under operational loads. To improve structural performance, modifications were implemented by increasing the thickness of ribs and spars in critical sections. The redesigned model reduced the maximum stress to 99.97 MPa, raised the minimum safety factor to 1.9, and decreased the maximum displacement amplitude to 0.672 mm. These findings confirm that the modified UCAV wing design achieves compliance with safety standards, enhances structural integrity, and demonstrates improved reliability under operational conditions.
Co-Authors Pratama, Muhammad Rizky Silalahi, NH Silalahi, NH Silalahi