岸式振荡水柱波能装置的波浪载荷及保护措施探讨

A STUDY ON WAVE LOAD AND SECURITY TECHNIQUES OF AN ON-SHORE WAVE POWER DEVICE

本文对振荡水柱波能装置的水柱做了时域计算，研究了内水柱在气室处于封闭状态、有阻尼状态和无阻尼状态下的动力响应。得出了相应的波浪载荷，并对波能装置的几种保护措施作了探讨。数值结果表明，带有阻尼的气室不能有效地阻止内水柱的运动，将使结构承受危险载荷的打击；全封闭的气室能有效地阻止内水柱的运动，但可能使气室里产生高压；收缩口与破浪锥联合作用，可以消耗水柱的动能，大大地减少载荷，是一种有前途的保护措施。

The movement of the Oscillating Water Column (OWC) inside a wave power device is calculated in time domain. The dynamic response of the OWC is studied when 1). the outlet of the chamber is shut down; 2) the chamber with damping and 3). the chamber without damping. The corresponding wave loads are obtained. Several security techniques for the device are discussed. The numerical results show that chamber with damping can not effectively restrain the movement of OWC when the period of incident wave is long, that will cause dangerous load in the structure. The shutdown chamber can effectively restrain the movement of OWC,but may alternatively cause high pressure in the chamber. A contraction area with a taper can exhaust a lot of kinetic energy of OWC ,and greatly decrease the load. It is a promising security technique.