“…As a 3D baffled tank is subjected to oblique horizontal excitation, the coupled effect of nature modes of sloshing waves will be triggered. Wu and Chen [28,29] reported that the types of sloshing waves in a 3D tank under various excitation angles and frequencies are the single-directional wave, square-like wave, swirling wave, and irregular wave, and these waves can be triggered by the specific excited frequencies of 0.9 1 , 1.5 1 , 1.0 1 , and 2 1 , respectively. In the following subsections, the effect of the baffle of a fixed height = 0.5 0 on the shift of natural modes of different types of sloshing waves for a 3D tank under oblique excitation is discussed in detail.…”