An arc-shaped vertical panel breakwater structure is designed to further enhance the wave dissipating performance of open-type breakwaters.A two-dimensional numerical model of wave interaction with this new structure is built using STAR-CCM+ software.The influences of arc panel angle and relative draft depth on the transmission coefficient,reflection coefficient,and energy dissipation coefficient of the arc-shaped vertical panel breakwater are investigated.Combining flow field analysis with structural characteristics,the underlying mechanisms of these effects are explored.The wave dissipation performance of structures at four arc plate angles is compared.The results indicate that the transmission coefficient of the arc-shaped vertical panel breakwater decreases with increasing arc plate angle and relative draft depth.The reflection coefficient decreases with increasing arc plate angle but increases with increasing relative draft depth.The energy dissipation coefficient increases with both increasing arc plate angle and relative draft depth.The structural parameters are set to an arc plate angle of 180° and a relative draft depth of 0.44,wave attenuation performance is significantly enhanced compared to other angles.The transmission coefficient,reflection coefficient,and energy dissipation coefficient are 0.26,0.57,and 0.60,respectively.The transmission coefficient reduces by up to 53.3%,the reflection coefficient by up to 7.17%,while the energy dissipation coefficient increases by up to 49.3%