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matlab_FEM_dismesh
DistMesh giving a singular FEM matrix?(Hi
Anyone here with some experience of using DistMesh in finite element code? I m solving the scalar Helmoltz equation in an annular region in 2D:
rho_1 < rho < rho_2
where rho_1 is the radius of a Perfect Electric Conducting cylinder and rho_2 is where the mesh is truncated using an Absorbing Boundary condition.
Now, I ve written code to mesh the region myself (by dividing the region into annular rings and picking a fixed number of points on each ring) and I ve written another program which uses DistMesh to mesh the region. I get a nice solution using my own meshing code but the FEM matrix becomes singular when I use DistMesh. This is the DistMesh Code I used:
Circle with hole
rABC=1.5
rCyl=0.5
fdstring=sprintf( ddiff(dcircle(p,0,0, f),dcircle(p,0,0, f)) ,rABC,rCyl)
fd=inline(fdstring, p )
box=[-2,-2 2,2]
[p,N]=distmesh2d(fd,@huniform,0.04,box,[])
I tried changing box and the 0.04 value (initial edge length). But every time, the matrix becomes sin)
- 2010-06-05 09:17:55下载
- 积分：1
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ROI
说明： 感兴趣区域提取。根据人感兴趣的区域对图像进行裁减(Region of interest extraction. According to people interested in the process of reducing the region' s image)
- 2009-08-01 10:29:21下载
- 积分：1
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examen-1
preprocesamiento primu
- 2012-05-10 11:09:56下载
- 积分：1
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二维拓扑优化问题
采用四边形网格划分,利用matlab实现二维拓扑优化问题!(Using quadrilateral mesh, using matlab to achieve two-dimensional topology optimization problem!)
- 2010-03-13 02:07:50下载
- 积分：1
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fenjihebing
分集合并技术的三种典型合并技术的matlab源程序代码仿真(Diversity combining techniques combined three typical simulation technique matlab source code)
- 2011-05-18 20:17:01下载
- 积分：1
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erwei-code
二维码制作工具，提供了QR二维码的制作，可以提供大小的标识。(Two dimensional code production tools, provide production QR two-dimensional code, can provide the size of the logo.)
- 2014-10-21 16:01:37下载
- 积分：1
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mixure
vc和matlab的混合编程，很好很全的(vc and matlab programming mix, full of very good)
- 2011-11-23 20:59:18下载
- 积分：1
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demos
时频分析部分程序，包括paramfun.m、tfdemo1.m、tfdemo2.m、tfdemo3.m、tfdemo4.m、tfdemo5.m等(The time-frequency part program)
- 2012-04-27 18:21:02下载
- 积分：1
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matlabnnp
bp pid 神经网络源程序，大家多指教
我是初学者(bp pid neural network program, everyone is a beginner enlighten me)
- 2007-03-20 08:48:23下载
- 积分：1
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SteepestDescentMethod
最速下降梯度法matlab程序
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(Steepest Descent Method
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- 2009-10-08 13:11:17下载
- 积分：1
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