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theSecond
这个程序分别用二分法,Newton法,弦截法,Newton下山法等算法求解非线性方程(this procedure were used dichotomy, Newton, String interception, Newton downhill law for solving nonlinear equations)
- 2006-10-18 11:01:49下载
- 积分:1
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tochnog-Masin
TOCHNOG PROFESSIONAL,有限元开源源程序。c++语言(TOCHNOG PROFESSIONAL, finite element open source. c++ language)
- 2021-04-03 09:59:06下载
- 积分:1
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mg
说明: 迭代算法中的多重网格计算程序Visual C++原代码(iterative algorithm of multiple grid computing procedures Visual C source code)
- 2007-03-31 10:11:48下载
- 积分:1
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test1_1
说明: 研究舍入误差的例程,可以帮助初学计算方法的人。(Of rounding error in the routine that can help beginners who calculation.)
- 2011-04-11 23:55:26下载
- 积分:1
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areaofcircle
一圆形游泳池如图所示,现在需在其周围建一圆形过道,并在其四周围上栅栏。
栅栏价格为35元/米,过道造价为20元/平方米。
过道宽度为3米,
游泳池半径由键盘输入。
要求编程计算并输出过道和栅栏的造价。(A circular pool as shown in figure, now in its built around to a circular corridor, and in its 4 around on the fence.
The fence for 35 yuan/m price, corridor cost for 20 yuan/square metre.
Aisle width is 3 meters,
The radius of the swimming pool by keyboard input.
Demand and output programming calculation of corridor and the cost of the fence.
)
- 2012-04-06 11:29:01下载
- 积分:1
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element-rigid-matrix
单元刚度矩阵,用于计算三单元刚度矩阵,输出刚度矩阵(Element stiffness matrix is used to calculate the three-element stiffness matrix, the output stiffness matrix)
- 2012-06-12 17:18:33下载
- 积分:1
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shipinfenxi
frft程序函数,分数阶傅立叶变换,短时傅立叶变换,傅立叶变换(the frft program function, fractional Fourier transform, short-time Fourier transform, Fourier transform)
- 2013-05-14 11:42:20下载
- 积分:1
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Euler_DG_Quadrilateral_2D
自己写了一个二维Euler方程的间断有限元程序
上次发了一个三角形单元的程序 因为不是曲边单元 所以在圆柱后面容易形成涡
现在把程序改为曲边四边形单元了 没有涡出现
单元是8节点四边形单元 节点编号顺序是 1 5 2 6 3 7 4 8 也就是四个角点依次
是1 2 3 4 然后是边的中点编号 5 6 7 8.
时间推进采用 Runge-Kutta 方法
数值通量采用全局Lax-Friedrichs通量
仍然不能捕捉激波 因为没有做重构或者加人工粘性 等这个做出来了 再发一次。
程序没有进行优化 比如说内存的消耗没有优化 比如直边单元的边界积分仍然采
用了曲边的积分方法 增加了计算量 比如面积分、线积分都是采用的是Gauss-
Legendre-Lobatto积分 积分精度会比一般的Gauss-Legendre积分精度低一阶 等
等问题。 二维的 纯属交流性质 就没有考虑这些问题 ^_^
如果物面全部是直边 那么只要改变一个参数N 就可以获得不同的计算精度 且具
有谱精度 因为单元的节点是Gauss-Legendre-Lobatto积分点。 其实就是谱元法
(物面是曲边的情况我不清楚是不是也可以通过提高基函数的阶数 也就是增加N
来提高计算精度)(Wrote a two-dimensional Euler equations with discontinuous finite element program
Last made a triangular element of the program, not curved edge unit is so easy to form a vortex in the cylinder behind the
Program to curved edge quadrilateral element vortices appear
Unit is the order of 8-node quadrilateral element node number is 15,263,748 which is the four corners of the points in turn
Is 1234 and then the side of the midpoint of the number 5678.
Time promote the use of Runge-Kutta method
Numerical flux of the overall situation of Lax-Friedrichs, flux
Still can not capture the shock wave did not do the reconstruction or artificial viscosity do it Zaifayici.
The program is not optimized for example, memory consumption is not optimized such as straight-edge boundary integral of the unit is still mining
Integral method to increase the amount of computation such as surface integral with a curved edge, the line integral using the Gauss-
The Legendr)
- 2021-01-29 12:58:40下载
- 积分:1
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1
说明: Fractal分形,简短的代码,清晰可用(Fractal)
- 2010-09-22 18:49:09下载
- 积分:1
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db
说明: 本程序用在测试采煤机煤矸识别系统中,验证小波算法(Wavelet Algorithm for caving coal)
- 2013-08-10 18:33:01下载
- 积分:1