摘要
本研究針對可沈式箱網，探討在颱風期間其受力分析與運動行為。本研究內容大致分兩部分：(1)數值模擬—用質量集結點建立一可沈式箱網纜繩數值模式，計算波流作用下錨碇點纜繩張力和網袋容積率大小。(2)水工模型實驗—以縮尺1/30之箱網模型，在波流作用下量測其錨碇點纜繩張力。
本研究結果：(1)實驗值與數值模式結果驗證—錨碇點纜繩張力值在實驗與數值模擬結果驗證下，兩者大致吻合。(2)數值模式應用—六口箱網錨碇纜繩最大張力為14232kg，遠小於錨碇纜繩的破斷張力42100kg。六口箱網下沈時，在相同海況條件下，錨碇繩張力約下降1000~4000kg；網袋最小容積率約提升15~30%。因此，建議將可沈式箱網於颱風來臨時下沈，以減少錨碇點受力及增加網袋容積率，間接增加箱網及魚群之安全性。

Abstract
This study focuses on the structure analysis and the dynamic response of the submerged cage net system. The research contents basically include two parts: (1) establishing a numerical model, which is able to predict the cable tension and the change rate of the cage net volume under the attack of typhoon waves; (2) implementing a hydrodynamic physical model test with model scale 1/30, which is installed in the water tank to determine the tension of mooring cable at the anchor.
The comparison of the results of the numerical model and the experimental data has shown a good agreement in the cable tension, which means that the numerical model is reliable and could be used to predict any cage net system with different configurations. Based on the numerical model, 1 – 6 cages net system has been calculated. The results indicate that the 6 cages net system is the worst case. For floating collar on the water surface, its maximum tension is about 14000 kg, but if the floating collar submerged under water surface 8m, the maximum tension will reduce to 10000 kg. Similarly, the minimum change rate of cage net volume may increase from 30% (floating collar on the water surface) to 50% (floating collar submerged in the water). Thus we strongly suggest that the floating collars have to be submerged during typhoon coming, not only because the reduction of mooring cable tension but also increase the fish survival space.

目錄
第一章 前言
第二章 箱網力學分析
第三章 水工模型實驗
第四章 實驗與數值結果比較
第五章 數值模式的應用
第六章 結論與建議
參考文獻

參考文獻
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