日照港码头结构消浪的数值模拟

摘要

针对日照港在建设和运行中出现港内、码头泊稳条件较差的状况,通过数值模拟方法研究码头结构形式和消浪设施对港池内波浪传播变形的影响.在波浪数值计算过程中,考虑西四期工程反射系数发生变化,导致波浪的折射、绕射、反射和波能损耗等物理现象,利用缓坡方程模型,并结合有限元方法,推算分析极端高水位和设计高水位2种工程水位、3个波向(E,ESE,SE)、2年一遇组合情况下的港池内波浪要素.模拟结果显示:西四期工程反射系数变化对港内的波浪情况影响较大;若采用有消浪结构的重力式码头,较采用传统的重力式码头港内泊稳条件可以大为改善,最终确定西四期码头的反射系数在0.6～0.8范围内较合理.%With regard to the poor mooring conditions of docks during the construction and operation of Rizhao Port, the effects of structural types of the docks and wave dissipation facilities on wave propagation and deformation were studied by means of the numerical simulations. In calculation of waves, the variation of reflection coefficient of the west dock No. 4 was considered, causing physical phenomena of wave diffraction, refraction, reflection and wave dissipation, etc. The wave elements in the dock basin were calculated by use of the mild-slope models and finite element methods under various working conditions, including 2 kinds of water levels (extremely high water level and design high water level), 3 wave directions (E, ESE and SE) and retum period of 2 years. The simulated results show that the variation of reflection coefficient in west dock No. 4 has obvious influences on wave distribution in the port area. The mooring conditions are greatly improved by adopting the gravity wharf with dissipation facilities, and the reflection coefficients of 0.6 to 0.8 are rational.