波-流联合作用场中流的等效作用研究

Study on equivalent effect of flow in wave-current field

针对波－流相互作用问题中的流速沿水深非线性分布的水流处理方法问题，提出了“等效均匀流”概念和相应理论，使非线性分布的水流作用等效为相应的均匀流作用，从而使问题大大简化．无论是二维顺、逆流问题还是三维波一流斜交折射问题，非均匀流都可以基于本文方法和理论予以近似处理，以采用等效均匀流概念计算的小尺度垂直桩桩的波一流联合作用力计算为例，对该理论和方法的应用作了初步的探讨和验证．

The concept of equivalent uniform current is presentec. In ceder to deal with the problem of interaction between wave andnonuniform current the nonuniform current can approximately be treated as the equivalent uniform current by this method. It is simplified to compute the wave and current which are arbitrary varying along water depth. The wave-current forces on small vertical cylinder have been calculated and the results are consistent with the precise solutions very well.