臺灣博碩士論文加值系統

本文主要研究海上箱網，在波流交互作用下，對錨碇繩產生之張力與箱網之運動情形。研究內容分為二部分：（一）數值模擬，採用質量集結點建立一套纜繩運動模式，在已知初始條件下，用Runge-Kutta-Cash-Karp數值方法，計算出箱網纜繩在波流共存流場，各質量集結點的運動位移，並求出各段纜繩之張力。（二）模型縮尺實驗，以縮尺1/30的箱網進行抗波流實驗，並量出纜繩張力與箱網運動軌跡。
程式計算值與實驗值比較結果，兩者吻合性良好。足證吾人可運用此數值模式，預測箱網錨綻系統之張力與運動行為。數值分析結果更進一步顯示，箱網垂直方向之運動，不受中間浮子式錨碇系統所影響，而水平運動、纜繩張力則與連接的纜繩長度、中間浮子大小有著直接關係。

A two-dimensional time-domain lumped parameter model for predicting the dynamic responses of cage aquacultural mooring system in an ocean environment is presented. Numerical integration techniques of fifth-order Runge-Kutta-Cash-Karp method is employed in the time stepping procedure. Numerical analysis consists of determining the tether tensions and the motions of mooring cage. Laboratory experiments with cage mooring system model have been made to determine the drag force necessary to describe the cage motions in the numerical model. Tensions and motions test in linear wave with steady flow have also been made.
Comparisons between the numerical model and physical model are good, thus, the extension of this numerical model for predicting the cage mooring system response can be made. The result has shown that the general mooring system would not restrict the cage heave motion; while the surge motion of cage and the tether tensions are greatly effected by the buoy buoyancy and the tether length.