对于其尺度与入射波波长L相比为较大的建筑物(例如各种形状的大尺度沉垫)的波力计算,目前采用两种方法。一是考虑包括散射效应和自由表面效应的绕射效应的理论分析,即绕射理论。此理论假定:波高H对建筑物特性尺度l_1的比值H/l_1较小,因而粘滞效应可以 Two methods are currently used for the wave calculation of buildings whose scale is larger than the incident wave length L (for example, large-scale mat of various shapes). One is to consider the theoretical analysis of the diffraction effect including the scattering effect and the free surface effect, that is, the diffraction theory. This theory assumes that the ratio H / l_1 of the wave height H to the building property scale l_1 is small so that the viscous effect can be