Finit element method have been adopted to further study stress field and rockmass deformation repture characteristic 建立概化邊坡的地質(zhì)模型,通過有限元數(shù)值分析,深化對工程邊坡的應力?形變作用的理解。
The finit element method is used to analyse the influence of reinforcement to displacement field of soft subgrade by way of comparing reinforced embankment with unreinforced embankment 摘要采用非線性有限元方法,通過比較土工格柵加筋路堤和未加筋路堤來分析加筋對軟基位移場的影響。
In the paper , with system energy balance method and heat conductive equations , on tne basis of short time heat transfer modeling established the long time modeling , considering heat interference in thermal well group . this paper used the finit element method for element division and computer analysis , and provided the operation temperature figure . acquired computation values agreed well with experimental results , the most difference between them was 5 . 13 % 本文采用系統(tǒng)能量平衡結(jié)合熱傳導方程,在淺埋套管式換熱器短期傳熱模型基礎上建立了長期傳熱模型,并考慮了管群熱干擾對模型的影響。并運用有限單元法軟件編程進行離散和計算機分析,得出模擬溫度場,其模擬值與實測的均值基本相符,兩者最大誤差小于5 . 13 % ,表明該模型具有一定的合理性和實用意義。
In this paper , we consider mixed finit element methods for the initial - boundary value problems of two order hyperbolic equations and linear integro - differential equations of parabolic type , obtain the error estimates of the discrete schemes for this two kinds of problems . in chapter one , we consider the expanded mixed finite element methods for the followling 2nd order hyperbolic problems this method expands the standard mixed formulation in the sense that three variable are explixitly treated : the scalar unknwon , its gradient and its flux 本文討論了二階雙曲方程和線性拋物型積分微分方程方程初邊值問題的混合有限元方法,得到了這兩類問題混合有限元離散格式的誤差估計。第一章討論二階雙曲初邊值問題的擴展混合元方法。該方法能同時逼近未知函數(shù)、未知函數(shù)的梯度和流體的流量,較好的模擬了帶有混合型邊界條件的二階雙曲問題。