This study focuses on optimizing the design parameters of buoy structures used in wave energy converters (WECs) to enhance their reliability and durability in harsh marine environments. The research employs finite element analysis (FEA) using ABAQUS to evaluate the effects of different materials (linear low-density polyethylene [LLDPE] versus high-density polyethylene [HDPE]), rib spacing, and structural thickness under uniform pressure conditions. The analysis considers configurations with 3, 5, and 7 ribs, and wall thicknesses of 0.5, 0.7, and 1 inch. Key findings include: - Increasing the number of ribs and wall thickness significantly reduces deflection and von Mises stress, enhancing structural stability. - HDPE demonstrates superior strength and lower deflection compared to LLDPE, although with reduced ductility. - Thicker walls (>0.7 inches) and stronger materials (HDPE) distribute loads more effectively, reducing the risk of localized stress concentrations and subsequent material failure. The study provides critical insights into optimizing buoy design parameters to improve structural performance and durability, ensuring the reliability and longevity of WEC buoys in challenging marine conditions. Future research should explore advanced material composites and design strategies to further enhance the efficiency and reliability of buoy structures under diverse operational conditions.This study focuses on optimizing the design parameters of buoy structures used in wave energy converters (WECs) to enhance their reliability and durability in harsh marine environments. The research employs finite element analysis (FEA) using ABAQUS to evaluate the effects of different materials (linear low-density polyethylene [LLDPE] versus high-density polyethylene [HDPE]), rib spacing, and structural thickness under uniform pressure conditions. The analysis considers configurations with 3, 5, and 7 ribs, and wall thicknesses of 0.5, 0.7, and 1 inch. Key findings include: - Increasing the number of ribs and wall thickness significantly reduces deflection and von Mises stress, enhancing structural stability. - HDPE demonstrates superior strength and lower deflection compared to LLDPE, although with reduced ductility. - Thicker walls (>0.7 inches) and stronger materials (HDPE) distribute loads more effectively, reducing the risk of localized stress concentrations and subsequent material failure. The study provides critical insights into optimizing buoy design parameters to improve structural performance and durability, ensuring the reliability and longevity of WEC buoys in challenging marine conditions. Future research should explore advanced material composites and design strategies to further enhance the efficiency and reliability of buoy structures under diverse operational conditions.