Wave Impact Pressure Calculations by Improved SPH Methods

摘要

This paper presents improved Incompressible SPH (ISPH) methods for the prediction of wave impact pressure, more specifically, impact pressure due to sloshing waves. The first improvement is the employment of a corrective function for enhancing angular momentum conservation. The second improvement applies a higher-order source term that is derived from a higher-order differentiation for a less fluctuating and more accurate pressure calculation. The third improvement proposes a new criterion for a more accurate assessment of free-surface particles in a particle-based calculation. The enhanced performance of improved ISPH methods in predicting wave impact pressure has been shown by simulating 4 cases of sloshing waves induced by sway excitations (Kishev et al., 2006) and rotational ones (Delorme et al., 2009).