本文主旨為利用試驗研究離岸套管式風力機基座在水下受波、流影響下，基礎週遭所受的沖刷情形；並且搭配使用近岸養殖結構¬¬-箱網結構於迎流面、迎波面下，比較有無箱網結構為保護工下，基礎週遭地形沖刷情形的差異。
試驗於國立成功大學水工試驗所的平面水池進行，試驗首先進行水動力試驗探討箱網位置的不同、箱網網衣長度的不同，對於流速的減緩與波高的降低的影響，找出最佳箱網條件。然後在不同水深與箱網位置條件下，分別探討固定波高，各種不同週期時，在迎波面時波高降低的效果。根據上述實驗結果，分別取兩種結果下箱網效果最好的位置放置箱網，進行地形沖刷量測試驗，探討有無箱網下地形受沖刷的差異。
根據波高衰減、流速減緩試驗分析結果，在迎波面放置箱網後，對於波高衰減效果不大；在迎流面放置箱網時，流速有較明顯的下降，低流速、箱網放置位置愈近、網衣長度愈長，對於流速減緩的效果愈好。在動床實驗分析結果方面，於純流條件下，發現在無箱網時，沖刷影響較大的區域主要位於迎流面，流速愈大則地形最大沖刷深度愈大、沖刷範圍影響愈大，且因基座影響流場而淤積的範圍也愈大。使用箱網後，各流速下有改善最大沖刷深度及較大深度的沖刷範圍減小等效果，因基座及箱網影響流場而形成的淤積範圍也較無箱網大，尤其流速大時，因基座及箱網影響流場而形成的淤積範圍也愈大。波流互制下，沖刷影響較大的區域主要位於迎流面及迎波面，使用箱網於迎流面後，對於迎流面基座樁柱有改善最大沖刷深度及較大深度的沖刷範圍減小等效果，且在背波面有因為流場受箱網影響而產生的淤積；在迎流面及迎波面皆使用箱網下，迎波面樁柱在最大沖刷深度及較大深度的沖刷範圍方面也獲得改善。

This paper aims to study the use of experimental base of offshore wind turbine casing underwater influenced by waves and stream suffered erosion around the base case . And with the use of offshore aquaculture structures , Cage structure, on the surface facing the stream and wave , compare the difference of the surrounding base of the topography be scoured for cage.

Test at National Cheng Kung University Hydraulics Laboratory plane tanks. First , the test carried out hydrodynamic tests discussing the different positions and length of cage netting, effecting of stream mitigation and reduction of wave height , find the optimum conditions for cage. Then fixed rule wave height and different wave periods, the experiments of wave attenuation were conducted. According to the above experimental results, two cases were taken the best cage condition to test for terrain erosion, and the situation of the topography scouring were investigated.

According to wave attenuation and slow down on test results, after placed cages in facing wave side, the wave attenuation was little affect. When the cage is placed in facing stream surface, stream rate has been significantly decreased. under low stream rate , cage placement closer , netting the longer the length , the better the effect of slowing down the stream rate. Experimental results in terms movable bed for pure stream, it is found that in the absence of cages the erosion affect large regions are mainly located in the surface facing the stream. The greater the rate the greater the depth of maximum scour will be, the greater the impact of scour range and due to the base effect the flow field the larger the range of deposition will be. After using cages , each of the stream rate has improved maximum scour depth and greater depth range is reduced erosion and other effects. Due to the base and the cage effect the flow field and the formation of sediment range is larger than those without cages , especially under the high rate, the deposition ranges formed by the base and the cage effect is larger. In wave-current interaction system, the scour affect large regions are mainly located facing the wave side and the facing stream side. After using cages in facing the stream, has decreased maximum scour depth and range of larger scour depth on the base of the pile facing the stream ,and in the back wave side there are siltation because the stream field affected by cage resulting. When using cage facing the wave side and the stream side, the cage of facing the wave side the maximum scour depth and greater depth of scour range has also improved.

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