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FractalDim
盒维数计算和豪斯多夫维数的计算与应用研究程序(box counting)
- 2013-07-27 17:50:31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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avalanche-master
计算回测程序，多因子选股模型，单因子测试(Calculation of back - test program, multi - factor stock - picking model, the single factor test)
- 2021-04-09 18:28:59下载
- 积分：1
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shangchuan
说明： 使用最小二乘法拟合，数据在程序里。本质是使用fiminuc函数求最小值。欢迎下载。(Use the least square method to fit the data in the program. The essence is to use fiminuc function to find the minimum value. Welcome to download.)
- 2020-05-24 15:36:53下载
- 积分：1
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laser18
光纤激光器速率方程 修改数值后可直接计算(The fiber lasers rate equation)
- 2013-05-14 15:46:23下载
- 积分：1
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GA
说明： 遗传算法用来求解带容量的车辆路径问题，用c++完成的代码(The genetic algorithm is used to solve the vehicle routing problem with capacity. The code is completed by c++.)
- 2019-06-19 16:30:06下载
- 积分：1
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beam
《ABAQUS在岩土工程中的应用》-费康中二次开发的梁单元应用(" ABAQUS in geotechnical engineering" - charges the secondary development of health in the application of beam elements)
- 2011-05-22 22:04:52下载
- 积分：1
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PQ-chaoliujisuan
利用快速解耦法进行电力系统潮流计算，对配电网进行潮流计算(Use of PQ decomposition method for the electric power flow calculation system)
- 2012-04-26 09:42:35下载
- 积分：1
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c_and_f
c/C++跟fortran语言之间的一些转换(c/C fortran language with the conversion between)
- 2007-05-31 13:46:32下载
- 积分：1
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Curve_Fitting
能够非线性函数的曲线拟合，包括一个Matlab的m文件和存有实验数据的txt文件。(Nonlinear function to the curve fitting, including a Matlab m-files and there are experimental data txt file.)
- 2008-04-22 19:55:47下载
- 积分：1
