Oblique water entry of a rigid paraboloid is investigated by fully nonlinear boundary element method. The deadrise angle of the paraboloid increases gradually from zero at the bottom tip and a slenderness coefficient is introduced to symbolize the shape of the paraboloid. Convergence study with respect to time step and element size is carried on to assure the numerical procedure. The free surface elevation and pressure distribution are depicted in time domain. The present solution is compared with the linearized Wagner method and the composite solution with spray jets to investigate the influence of exact fully nonlinear boundary conditions. As there is no sharp edge or tip around the paraboloid, the water flows over the body both from lateral side and down side in oblique entry, the stagnation point relative to the body moves towards the flow-coming direction, and the negative pressure can be observed on both lateral side and down side of the paraboloid. The horizontal speed has great influence on horizontal total force and little influence on vertical total force, while the effect of the slenderness coefficient just has the opposite effect.

通过完全非线性边界元方法研究了刚性抛物面的倾斜进水。抛物面的死角从底端的零开始逐渐增加，并且引入了细长系数来表示抛物面的形状。进行关于时间步长和元素大小的收敛性研究，以确保数值程序。自由表面标高和压力分布在时域中描述。将本解决方案与线性Wagner方法和带喷流的复合解决方案进行比较，以研究精确的完全非线性边界条件的影响。由于抛物面周围没有锋利的边缘或尖端，因此水在倾斜进入时会从侧面和下方流过身体，相对于人体的停滞点朝着流动方向移动，并且在抛物面的侧面和侧面都可以观察到负压。水平速度对水平总力的影响很大，而对垂直总力的影响很小，而细长系数的作用恰好相反。