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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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BP-optimization
基于遗传算法的BP优化（电力系统负荷预测）(BP optimization based on genetic algorithms)
- 2021-02-15 16:19:47下载
- 积分：1
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circle_diagram
this is the code to illustrate greedy algorithm in matlab
- 2010-10-28 07:49:16下载
- 积分：1
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3
To support wireless communication : MIMO
- 2013-12-24 21:53:23下载
- 积分：1
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15883827radarmodel
雷达模型MATLAB描述，为雷达的信号处理提供模型(MATLAB description of the radar model for radar signal processing to provide model)
- 2010-12-10 21:25:03下载
- 积分：1
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matlabdrawingprogram
一个简单的程序
用以matlab的画图
供新手参考(a small program for green students)
- 2010-05-10 11:13:06下载
- 积分：1
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MUSIC-revised
本文是music算法的一种改进，其具有更好的性能，以及能够满足大多数用户的需求，希望会给大家带来方便(This article is a modified music algorithm, which has better performance, and the ability to meet the needs of most users, I hope we will bring convenience)
- 2014-01-19 21:37:16下载
- 积分：1
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Wiener_weinanupo
这个matlab代码是用维纳滤波得到的运动场。(The motion field is obtained from Wiener filtering in matlab code.)
- 2010-07-14 13:15:46下载
- 积分：1
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FabricDefectDetect
Fabric Defect Detection Method Based on Gabor Filter Mask
- 2010-03-16 08:28:51下载
- 积分：1
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Newgrowcut
基于改进的GrowCut算法实现图像分割的代码，实现的平台是Windows下的Matlab。(The code image segmentation based on improved GrowCut algorithm implementation under Windows platform is Matlab.)
- 2013-01-16 21:41:12下载
- 积分：1
