侧壁开口沉箱水动力学研究

Study of Hydrodynamic Behavior of Wave Power Absorbing Caisson with Local Opening

对具有吸能作用的侧壁开口沉箱在二维线性波作用下的水动力性能进行了研究： 采用局部有限元法分析流场．气室喷嘴负荷按能量等效原则进行线性化处理．计算表 阴．沉箱内外波高均小于立波波高；作用在沉箱的水平波力及倾覆力矩都比立波作用 在实体沉箱上小：沉箱吸能的效率与波周期的关系曲线簇呈共轴型．理论计算的波高 反射率及气室相对气压与实验基本吻合，与 Ｒ．Ｏｊｉｍａ等的实验值吻合也较好．

The hydrodynamic behavior of a wave power absorbing caisson with local opening under the action of 2D linear wave is studied in this paper. To solve the potential flow field a localized finite element method is adopted. The pressure drop through the air nozzel is linearized by means of the principle of energy equivalency.The theoretic results show that the relations-hip between the efficiency of the wave power extraction and wave frequency presents the coaxality and the wave height in or out caisson is smaller than that of stand wave. The horizontal wave force and the overturning moment on the caisson are smaller than those on solid caisson. The agreement of reflecting coefficients of wave height and air pressure in air chamber between the theory presented by this paper and the experiment conducted by paper[4] is quite well.