Study on Characteristics and Generation Mechanism of Tsunami Bore Force Acting on Conical Island

Research on characteristics of tsunami forces acting on conical islands and acting on cylindrical structures placed on top of a conical island, as well as the generation mechanisms of the tsunami forces, is limited. The total tsunami force acting on conical islands and its generation mechanisms are studied in cases with different initial water depths and relative wave heights. The results indicate that the peak values of the positive and negative tsunami forces, which increase with both initial water depths and relative wave heights, have almost the same magnitude. The initial submerged state of the conical island does not change the variation trend of tsunami force peaks with relative wave height. Then the tsunami forces on the structures located at different positions on the conical island are compared and analyzed, and the results show that when the conical island is not submerged at the initial state, the front cylinder has the largest peak value; when the conical island is submerged at the initial stage, the rear cylinder has the largest peak value.