Haskind discussed the non-steady motions of small curved planing plate by using the theory of complex functions, and obtained the general expression of hydrodynamic forces.
哈斯·金德用复变函数理论讨论了微弯滑行板的非定常运动，获得了计算水动力的一般公式。
2
Based on the nonlinear motion theory and the radiated energy method, two methods for calculating the resistance increase of planing boats in irregular waves are presented.