The characteristic approximation is used to handle the convection part along the direc-tion of fluid namely characteristic direction to ensure the high stability of the method in approximating the sharp fronts and reduce the numerical diffusion; The mixed finite element spatial approximation is employed to deal with diffusion part and approximate the scalar unknown and the adjoint vector function optimally and simultaneously; In order to preserve the integral conservation of the method, we introduce the modified characteristic method.

該方法對方程的對流部分沿流體流動的方向即特征方向離散以保證格式在流動的鋒線前沿逼近的高穩(wěn)定性国产乱伦视频一区二区，消除數值彌散現象特级无码黄片；對方程的擴散部分采用最低次混合有限元方法離散羞羞自拍无码视频在线观看中文字幕、同時以高精度逼近未知函數及未知函數的梯度91国内自拍第九页；為保證方法的整體守恒性，在格式中引入修正項自拍偷拍色。

However the computation of the finite element method is very complex when dealing high-dimensional problems. So that in order to solve the multi-variables problems, the alternating- direction method appears. It can lower the dimension.

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A new non-conforming finite element FE eigenanalysis method is developed to determine the order and angular variation of singular stress states at material and geometric discontinuities in anisotropic materials subject to antiplane shear loading.

提出采用一種非協(xié)調元有限元特征法來計算各向異性材料在反平面剪切載荷作用下的奇性應力指數和奇性場角分布国产在线com。該方法沒有采用奇異變換技術。與以前的幾種解析法比較1024日韩欧美手机在线你懂的，結果表明這種方法的收斂性好草逼福利视频，精度高，可以求解關于復雜幾何體問題

The result shows that the mixed boundary condition can greatly reduce the calculation area without affecting accuracy of the solution.It is followed by the higher accuracy of Dirichlet boundary condition which makes the boundary error greater when measured points is near the boundary, so we must take a sufficiently large border region.The homogeneous boundary condition has relatively large error, but the use of non-triangle poles devices makes apparent resistivity calculation error become small, because of elimination of the effect on potential difference for the infinite boundary. In inversion, in order to save computing time, homogeneous boundary conditions are often used to perform finite element forward calculation.

結果表明国产91最新资源网址，混合邊界條件精度最高0464信息网，可大大縮小求解區(qū)域而不影響計算精度，其次是Dirichlet邊界條件精度較高人人射人人操人人干，但測點越靠邊界誤差會越大，必須取足夠大的邊界區(qū)域在线观看一级视频免费，齊次邊界條件的誤差比較大日韩欧美一级A片免费观看视频，但如果采用非二極裝置，通過電位差計算得到的視電阻率玖玖视屏免费在线观看，由于無窮遠邊界對電位差的影響基本消除欧美最新性交，視電阻率計算誤差與混合邊界條件下的接近，在反演中niuav25.com，為了節(jié)省計算時間黄网站男人永久免费，經常使用齊次邊界條件進行有限元正演。

For every step of arbitrary m-th order finite element methods of nonlinear Hamiltonian systems are first proved high accuracy conservate their symplectic structure, through construct a new auxiliary equation and negative norm estimated of error.

對非線性Hamilton系統(tǒng)的任意m次有限元法亚洲性爱视频网，構造了新的輔助問題美女一级一级A一级免黄，并得到誤差估計和負范數估計日韩国产不卡在线，首次證明m次有限元對每一次步進是高精度Oh~(2m+1意義下近似保辛的。

A new method of the design for tie bar and falsework during the construction of the thin-wall of bridges;2. Study on the Dowel and Tie Bar in Jointed Plain Concrete Pavement;3. In order to overcome the problem of early failure of the tie bar in the plastics injection molding machine, an integrated finite element analytic model was formulated dealing with the tie bar s,fixed platen, movable platen, and rear platen.

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In order to understand the seismic performance of the large complex structure with basement, the structure-pile-soil finite element model of two typical cross sections of the Tianjin Transportation Junction were established by using the ANSYS software. The elasto-plastic time history analysis was made, and the seismic responses of the whole system under the horizontal seismic load were got. Comparing the results of the seismic response with the rigid foundation model, some reasonable conclusions are drawn.

為弄清楚帶有地下室大型復雜結構的抗震性能国产91色色，本文針對天津站交通樞紐工程超碰精品在线免费，分別取結構典型的橫向及縱向剖面，應用大型通用有限元分析軟件ANSYS中文字幕强奸视频观看，建立了結構－樁－土體系相互作用的有限元模型狼友视频在线精品，采用動力時程分析方法，研究體系在水平地震作用下的彈塑性動力反應規(guī)律成人免费黄色视频观看在线，分析結構在地震動作用下的位移和內力的分布午夜性一级视频；并與假定剛性基礎周邊土簡化為彈簧的結構模型的計算結果進行比較，通過兩種模型的地震反應的對比分析欧美日韩高清，得到了一些有益的結論67色国产欧美。

Regarding small convergence interval of conical degree as machinery sealed ring basic principle of structure optimization,with the maximum contact pressure as goal function,with the wear allowance of float ring as designing variable,the first order optimization method was applied to carry on thermal-structural coupling finite element optimization analysis of machinery sealed ring.

以小錐度的收斂間隙為優(yōu)化原則，以最大接觸壓力作為目標函數av在线免费看污片，以靜環(huán)端面的磨損裕度為設計變量狠狠艹av，采用一階優(yōu)化法進行機械密封環(huán)熱-結構耦合有限元優(yōu)化計算。

In order to quantitatively analyze the aseismatic performance of this kind of beam-column assemblies through whole loading history, the non-linear FE analyses of the cross beam-column specimens were carried out by ANSYS. Compared to the experimental results, the finite element analyses cast a further light upon the characteristics of this beam-column assembly while being subject to cyclic reverse loading.

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The governing equation is the mild-slope equation. Finite element method has advantage to treat complicated boundary. The second order radiation boundary condition is expanded to improve the wave model for large incident wave angles. The validity of the second order radiation condition is examined through varying arbitrary wave incident angles.

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