首页> 外文会议>Second International Conference on Wetlands amp; Remediation, Sep 5-6, 2001, Burlington, Vermont >INVESTIGATION OF WETLAND CHARACTERISTICS BY USING FINITE ELEMENT METHOD
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INVESTIGATION OF WETLAND CHARACTERISTICS BY USING FINITE ELEMENT METHOD

机译:有限元法研究湿地特征

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HEC RAS background and unsteady flow governing equations are given in this research. The HEC RAS 3.0 unsteady solver is adapted from Barkau's UNET model (Brunner, 2001). UNET utilizes a four point implicit scheme to solve the unsteady flow equations (Barkau, 1997). The continuity and momentum equations are : partial derivt/partial derivA + partial derivt/partial derivS + partial derivx/partial derivQ-q_l = 0 (Continuity) partial derivt/partial derivQ + partial derivx/partial deriv(VQ) + gA( partial derivx/partial derivz + S_f ) =0 (Momentum) where: x = distance along the channel t = time Q = flow A = cross-sectional area S = storage q_l = lateral inflow per unit distance The finite difference approximations of the terms in the continuity equation are: ΔQ (Q_(j+1)-Q_j) + θ(ΔQ_(j+1)-ΔQ_j) The aim of this paper is to investigate the behaviour of a wetland by different scenarios: 1) The bathymmetrie changes after the earthquake 2) Seepage from the river and sea-shore 3) To give shallow water equations by using finite elements method .
机译:本研究给出了HEC RAS背景和非恒定流控制方程。 HEC RAS 3.0非稳态求解器改编自Barkau的UNET模型(Brunner,2001年)。 UNET利用四点隐式方案求解非恒定流方程(Barkau,1997)。连续性和动量方程为:偏导数/偏导数A +偏导数/偏导数+偏导数/偏导数Q-q_l = 0(连续性)偏导数/偏导数Q +偏导数/偏导数(VQ)+ gA(偏导数/偏导数+ S_f)= 0(动量)其中:x =沿通道的距离t =时间Q =流量A =截面积S =存储量q_l =每单位距离的横向流入量连续性方程为:ΔQ(Q_(j + 1)-Q_j)+θ(ΔQ_(j + 1)-ΔQ_j)本文的目的是研究湿地在不同情况下的行为:1)湿对称性在地震2)河流和海岸的渗水3)使用有限元方法给出浅水方程。

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