An introduction to the theory of extreme value distribution is made in order to expatiate upon the weight calculation method for the armor stones of sloping breakwater. In addition, Hudson formula and Van der Meer formula are introduced by focusing on their characteristics. A 2D joint distribution model is built to calculate the joint recurrence characteristic values of wave heights and periods. The related parameters are applicable for Hudson formula and Van der Meer formula. The joint distribution of wave height and period may lower the calculated weight of armor stone, which can serve as a reference in the design of armor.%本文对极值分布理论进行了介绍,对斜坡堤护面块石重量的计算方法进行了阐述.介绍了Hudson公式和Van der Meer公式,并对Hudson公式和Van der Meer公式的特点进行了叙述.通过建立波高与周期的二维联合分布模型,对不同波高和周期的联合重现期特征值进行了计算,并将波高和周期参数应用到Hudson公式和Van der Meer公式.经过对比,采用波高和周期的联合分布,可以使护面块石重量的计算值降低,对块石护面的设计具有借鉴意义.
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