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算材料学中用相场法模拟合金凝固相变的程序 1658947 Console6
计算材料学中用相场法模拟合金凝固相变的程序(Computational Materials Science using phase-field simulation of solidification phase change process)
- 2021-01-28 16:38:34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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petsc-3.0.0-p6.tar
PETSc (Portable, Extensible Toolkit for Scientific Computation) 是美国能源部ODE2000 支持开发的20 多个ACTS 工具箱之一，由Argonne 国家实验室开发的可移植可扩展科学计算工具箱，主要用于在分布式存储环境高效求解偏微分方程组及相关问题。(PETSc (Portable, Extensible Toolkit for Scientific Computation) is ODE2000 U.S. Department of Energy to support the development of one of more than 20 ACTS Toolkit, developed by the Argonne National Laboratory' s Portable, Extensible Toolkit scientific computing, mainly used in the distributed memory efficient environment for solving partial differential equations and related issues.)
- 2009-06-15 19:13:38下载
- 积分：1
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三维 近场－远场 变换 FDTD
三维 近场－远场 变换 FDTD...........(FDTD near field to far field transmition)
- 2020-06-27 03:20:01下载
- 积分：1
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floyd
最短路径floyd算法 数学建模 matlab(Floyd shortest path algorithm of mathematical modeling matlab)
- 2008-06-14 15:58:28下载
- 积分：1
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ellf
说明： 巴特沃斯、切比雪夫I和椭圆滤波器设计的源程序！非常难得！
简洁的C语言编写(Butterworth, Chebyshev I and elliptic filter design of the source! Very rare! Concise C language)
- 2005-10-26 22:53:24下载
- 积分：1
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C3.17
说明： 有两个ARMA过程，其中信号1是宽带信号，信号2是窄带信号，分别用AR谱估计算法、ARMA谱估计算法和周期图法估计其功率谱。(There are two ARMA processes, in which signal 1 is a wideband signal and signal 2 is a narrowband signal. The power spectrum is estimated by AR spectrum estimation algorithm, ARMA spectrum estimation algorithm and periodogram method respectively.)
- 2020-07-27 09:27:39下载
- 积分：1
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Laguerre-fitting
基于Laguerre多项式的拟合程序，可以控制多项式的结束，以及变量alpha。(Based on Laguerre polynomial fitting procedure, you can control the end of polynomials, and variable alpha.)
- 2014-01-02 21:43:58下载
- 积分：1
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TSWLS-NLOS
室内无线定位技术，基于两次最小二乘法的matlab仿真程序(Indoor wireless positioning technology, based on the two least-squares method matlab simulation program)
- 2013-10-27 01:06:31下载
- 积分：1
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1
说明： 数学建模工具箱
有丰富的数学建模模型，全部用matlab语言编写(Mathematical Modeling Toolbox)
- 2009-12-28 08:43:56下载
- 积分：1
