<p>This paper presents a new type of triangular Sharp Eagle wave energy converter (WEC) platform. On the basis of the linear potential flow theory and the finite element analysis method, the hydrodynamic performance and structural response of the platform are studied, considering the actual platform motion and free surface rise under extreme sea states. First, the effects of the wave frequency and direction on the wave-induced loads and dynamic responses were examined. The motion at a wave direction angle of 0° is relatively low. On this basis, the angle constrained by the two sides of the Sharp Eagle floaters should be aligned with the main wave direction to avoid significant platform motion under extreme sea states. Additionally, the structural response of the platform, including the wave-absorbing floaters, is investigated. The results highlighted that the conditions or locations where yielding, buckling, and fatigue failures occur were different. In this context, the connection area of the Sharp Eagle floaters and platform is prone to yielding failure under oblique wave action, whereas the pontoon and side of the Sharp Eagle floaters are prone to buckling failure during significant vertical motion. Additionally, fatigue damage is most likely to occur at the connection between the middle column on both sides of the Sharp Eagle floaters and the pontoons. The findings of this paper revealed an intrinsic connection between wave-induced loads and the dynamic and structural responses of the platform, which provides a useful reference for the improved design of WECs.</p>