劉格非2006-07-252018-07-092006-07-252018-07-092003http://ntur.lib.ntu.edu.tw//handle/246246/2809本研究的重點在於發展波譜元素 法,此方法同時包含快速計算與可求得空 間中任一點的優點。本方法的基礎建立於 波譜法與有限元素的原理,其為權重餘數 法(MWR)的一種。在本研究中所選取的 基函數為Chebyshev 多項式,其優點在於 可處理非週期性的邊界問題。並在研究中 利用有限元素的概念將問題的定義域 ( domain ) 分割成數個次定義域 (sub-domains),以加快計算的收斂速度 及增加計算時的精度。 再利用現場採樣來驗證程式,同時配 合參數檢定程式來檢定現場水質參數如 曝氣係數、延散係數。 最後利用上述成果建立一個教學網 站,將研究與程式結合成教學工具。The purpose of this research is to develop the Spectral Element Method. The trial functions is chosen to be Chebyshev function which can handle non-period boundary problem. We use the concept of the Finite Element Method to divide computational domain to several sub-domains to accelerate the convergence rate and the accuracy . 1 Field experiments are carried out in order to test the validity of the numerical program. Field measurements are used to validate the numerical program. Combined with calibration program, many in situ parameters, such as recreation coefficient and dispersion coefficient, are also obtained. All the above then is combined to establish an interactive teaching web.application/pdf89605 bytesapplication/pdfzh-TW國立臺灣大學土木工程學系暨研究所波譜元素法數值模擬教學網站Finite element spectral methodNumerical simulationInteractive teaching Web利用有限元素波譜法建立河海三維水理水質數值模式(3/3)Finite element spectral method applied in 3-D nearshore numerical model (III)reporthttp://ntur.lib.ntu.edu.tw/bitstream/246246/2809/1/912211E002060.pdf