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FFT
提供函数能进行1维2维的FFT，输入输出的序列长度应为2的整数次方倍(Provides functions can be one-dimensional two-dimensional FFT, sequence length input and output should be an integer power of 2 times)
- 2014-01-07 22:10:34下载
- 积分：1
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ABAQUS+UMAT+FORTRAN
ABAQUS中用户材料子程序UMAT的开发主要解决两方面的问题：本构模型的建立和积分算法的选择。
本文主要研究非线性材料的UMAT实现方法，并重点研究其迭代算法部分，目前，用户材料子程序UMAT的迭代算法主要是常刚度法，常刚度法的优点在于算法原理较简单，程序编写较方便，缺点是当遇到复杂非线性材料时，其迭代次数较多，收敛速度也较慢，在这个情况下，本文采取的是一种迭代次数较少且收敛速度较快的切线刚度法，具体就是采用FORTRAN语言编制了基于Von-Mises模型的接口程序,并采用切线刚度算法，通过与ABAQUS自带本构关系计算的结果相比较，验证其正确性。(This paper studies the user subroutine UMAT of ABAQUS development methods, the use of FORTRAN language isotropic hardening material model of the interface program, studied the effects of such material is extremely elastic-plastic constitutive relation method.
This article UMAT tightly around the secondary development of technology, the first principle of its interface detail, and then for the theory of nonlinear finite element incremental stiffness of the regular tangent stiffness method and the theory of algorithms to do an in-depth analysis of deduced a regular tangent stiffness and rigidity of the law of the specific expression of algorithm theory, and then the preparation of the two algorithms, respectively, of the UMAT program, and finally the establishment of a specific model checking, bringing with ABAQUS elasto-plastic constitutive relation of the calculated results compared to verify the correctness of the two.)
- 2020-12-05 21:59:24下载
- 积分：1
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homotopy
同伦算法解非线性方程组，构造不动点问题,并从不同的初始点出发运行程序。(To solve nonlinear equations with homotopy algorithm，constructing a fixed foint progrem.and from the different starting point to run the program. )
- 2014-03-20 13:55:02下载
- 积分：1
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excellentprocedureorthesolutionofequations
一个优秀的解方程组的程序比如超定方程，病态方程。是我在做项目时遗留下来的，上传给大家使用！(An excellent procedure for the solution of equations such as over-determined equation, ill-conditioned equations. Yes I was doing projects left behind, upload for everyone to use!)
- 2009-11-11 12:21:08下载
- 积分：1
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LL1 grammer
vc++实现编译原理中的LL(1)文法的编译过程,非常好用.(vc realization of the principle of compiler LL (1) grammar compiler course, very handy.)
- 2005-07-03 21:22:30下载
- 积分：1
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B_ADI
ADI method for solving PDE equations
- 2019-01-02 15:37:35下载
- 积分：1
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LSSVM
利用最小二乘支持向量机原理，创建了LSSVM预测模型(The principle of least squares support vector machine, created LSSVM prediction model)
- 2013-04-01 16:55:12下载
- 积分：1
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daoxianzhaoxing-ansys
这是一段导线找形的命令流，可用于ansys有限元分析(This is a piece of wire to find the form of order flow, can be used for finite element analysis ansys)
- 2021-04-20 16:38:50下载
- 积分：1
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Sod
利用5阶WENO有限差分法求解一维Euler方程组，给出求解Sod型激波管问题的详细程序。(The use of 5-order WENO finite difference method for solving one-dimensional Euler equations given type of shock tube problem solving Sod detailed procedures.)
- 2014-02-07 11:03:08下载
- 积分：1
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surrocallfunction
替代数据方法（基于相位随机化方法），检验续写的非线性(Surrogate data method (based on random-phase method), non-linear write test)
- 2020-07-26 20:48:41下载
- 积分：1
