【摘要】 对船舶兴波阻力计算中差分格式、配置点移动产生的数值误差及其耦合影响进行了分析，认为不同的差分格式或其线性组合仅能控制格式自身的数值耗散与色散，而对总体色散误差的改变无能为力．配置点移动与差分格式的耦合作用则可能从量级上降低总体色散误差．更多还原

【Abstract】 An analysis of numerical errors resulting from difference scheme,collocation point shift and their coupling effects is made in this article.It is considered that different difference schemes of their linear combination can only be effective on controlling their own numerical damping and dispersion but not on changing the overall numerical dispersion.However,it is possible to reduce the order of magnitude of overall numerical dispersion error by using the coupling of difference scheme and collocation point shift.更多还原