搜索结果: 1-15 共查到“理学 FEM”相关记录18条 . 查询时间(0.218 秒)
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Dispersion Analysis of CIP–FEM for Helmholtz Equation
亥姆霍兹方程 CIP-FEM 色散分析
2023/4/24
When solving the Helmholtz equation numerically, the accuracy of numerical solution deteriorates as the wave number k increases, known as `pollution effect' which is directly related to the phase diff...
含地形起伏的MT模型非规则四边形FEM正演与反演
大地电磁 非规则四边形网格 L-curve法 正则化约束反演
2019/3/6
从大地电磁(MT)边值问题满足的变分方程出发，采用非规则四边形网格、双线性插值有限单元法(FEM)开展复杂起伏地形MT模型正演，探讨二维Jacobian变换行列式的计算方法，推导任意非规则四边形单元的插值方式及单元系数矩阵表达式，实现起伏地形MT模型的高精度正演。然后，介绍光滑约束的Tikhonov正则化反演算法，针对反演中正则化参数选取困难的问题，将广泛应用的L-curve法引入反演的正则化参数...
We consider geometric biomembranes governed by an L
2
-gradient flow for bending energy subject to area and volume constraints (Helfrich model). We give
a concise derivation of a novel vector...
Error Analysis of a Dual-parametric Bi-quadratic FEM in Cavitation Computation in Elasticity
error analysis dual-parametric bi-quadratic finite element
2014/12/5
The orientation preserving conditions and approximation errors of a dual-parametric bi-quadratic finite element method for the computation of both
radially symmetric and general nonsymmetric cavity s...
秀丽隐杆线虫Caenorhabditis elegans fem-1基因是性别决定的关键基因。本研究基于生物信息学方法从东亚飞蝗Locusta migratoria manilensis的转录组数据库中克隆出了线虫fem-1的3个同源基因， 将其分别命名为Lmfem-1a， Lmfem-1b和Lmfem-1c (GenBank登录号分别为AB698670， AB698671和AB698672)。其...
On the Coupled of NBEM and FEM for an Anisotropic Quasilinear Problem in Elongated Domains
Quasilinear Elliptic Equation Elliptic Artificial Boundary Natural Integral Equation
2013/1/30
In this paper, based on the Kirchhoff transformation, the coupling of natural boundary element method and finite element method are discussed for solving exterior anisotropic quasilinear problems with...
随钻电阻率测井仪器响应数值模拟在电法测井仪器研制和资料处理与解释中具有重要的意义.本文利用自适应hp有限元算法(hp-FEM)模拟和分析了地层各向异性以及相对倾斜对仪器接收信号幅值比和相位差的影响,并对仪器响应特性进行了评价;同时,利用HERMES有限元软件包与VC++开发平台相结合,可以对随钻电阻率测井仪器响应数值模拟过程中,仪器产生的感应电场在地层中和地层分界面处的分布进行显示,从而为钻井地质...
Three‐dimensional FEM derived elastic Green’s functions for the coseismic deformation of the 2005Mw8.7 Nias‐Simeulue, Sumatra earthquake
Green’s functions coseismic deformation finite element model
2014/4/9
Using finite element models (FEMs), we examine the sensitivity of surface displacements to the location of fault slip, topography, and three‐dimensional variations in elastic moduli in the context of ...
通过夹具布局和夹紧力大小的优化可以提高薄壁件加工精度. 建立了夹具布局和变夹紧力分层优化模型. 首先, 以工件加工变形最小化和变形最均匀化为目标函数, 对夹具布局进行优化设计; 其次, 基于优化的夹具布局对变夹紧力进行设计. 采用有限元法计算工件的加工变形, 加工变形求解时综合考虑了接触力、摩擦力、切削力、夹紧力和切屑的影响. 采用遗传算法求解优化模型, 获得优化的夹具布局和变夹紧力. 通过实例...
FEM-Modelling of Open Stormwater Detention Ponds
FEM-Modelling Open Stormwater Detention Ponds
2009/10/23
Stormwater in urban areas is polluted with suspended materials vihich transport
heavy metals and degrade the quality of the receiving waters. Since open detention
ponds improve water quality, an inv...
FEM analysis of deepwater drilling risers under the operability and hang-off working conditions
drilling riser operability hang-off FEM analysis
2011/9/13
In recent years, numerous exploration activities of oil and gas industry have been conducted in ultra deep water. The global offshore industry is building systems today for drilling in even deeper wat...
该文将超松弛重叠及非重叠区域分裂法(DDM)与矢量有限元方法(EB-FEM)、边界积分方程(BIE)法相结合对三维电大尺寸开口腔体的电磁(EM)散射特性进行分析。通过DDM将原腔体分解成若干子腔体，在各子腔体内应用EB-FEM进行分析。腔体间应用矢量传输条件进行耦合，最终腔体内电场分布通过迭代获得。在原腔体口面，运用积分方程进行描述。在分析过程中，将传输条件和BIE统一成第三类边界条件形式。最后给...
本文用三维非连续变形与有限元相结合（DDA+FEM）的方法，在青藏川滇地区三维构造块体相互制约的大背景中，通过用GPS资料做位移速率边界约束和震源机制约束，计算得到研究区的初始位移场和应力场与该地区GPS测量结果和震源机制分布结果基本一致.在此基础上进一步数值模拟1997年玛尼7.9级大震的发生过程，研究大震引起研究区各块体边界断层应力状态变化的特征.（1）发震断层两侧发生左旋走滑错动，最大水平位...
本文用三维非连续变形与有限元相结合（DDA+FEM）的方法，在青藏川滇地区三维构造块体相互制约的大背景中，通过用GPS资料做位移速率边界约束和震源机制约束，计算得到研究区的初始位移场和应力场与该地区GPS测量结果和震源机制分布结果基本一致.在此基础上进一步数值模拟1997年玛尼7.9级大震的发生过程，研究大震引起研究区各块体边界断层应力状态变化的特征.（1）发震断层两侧发生左旋走滑错动，最大水平位...