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untitled
一个电力系统故障测距的仿真模型，可以仿真各种线路故障(A power system fault location simulation model that can simulate a variety of line fault)
- 2011-07-08 11:39:05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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6s大气校正模型添加HJ1B-CCD1响应函数，以编译
根据6SV2.1，在原有基础上，添加HJ1B-CCD1的光谱响应函数，完成编译过程，生成sixsV2.1.EXE
所需文件
6s源码：http://6s.ltdri.org/pages/downloads.html
是2015年发布的V2.1版本。
所需卫星的光谱响应函数文件
HJ-1B卫星的CCD相机的光谱响应函数，可以在
http://www.cresda.com/site1/Downloads/gpxyhs/index.shtml
下载，这个网页还有GF、ZY等卫星的光谱响应函数文件。
- 2022-03-03 18:30:05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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双椭圆程序
说明： abaqus中用fortran编写的热源子程序（双椭球）(Subroutine of heat source (double ellipsoid) written by Fortran in ABAQUS)
- 2021-01-18 17:20:13下载
- 积分：1
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EnKF集合卡尔曼滤波代码
EnKF集合卡尔曼滤波代码，用于读写模式集合，包括两种扰动观测分析方案。(These files illustrate the model used for storing, reading and writing the
ensemble of model states.)
- 2018-05-02 10:58:56下载
- 积分：1
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elasticity
说明： abaqus vumat 子程序入门
UMAT FOR ABAQUS/STANDARD INCORPORATING ELASTIC BEHAVIOUR FOR PLANE STRAIN AND AXI-SYMMETRIC ELEMENTS.(introduction to abaqus vumat subroutine)
- 2020-07-08 19:20:08下载
- 积分：1
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Finite element programming
本书详细介绍了三个专用有限元程序设计的全部过程。可供工程，应用力学，应用数学，计算机科学等专业的科学工作者和学生参考使用(Finite Element Programming E.Hinton D.R.I.Owen
This book describes the whole design process of three special finite element programs.)
- 2020-10-04 12:17:39下载
- 积分：1
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Simpson
Simpson 求解积分，很方便使用的求解积分的方法。希望大家喜欢(Simpson for integration, it is easy to use solution of the integral approach. I hope you like)
- 2013-11-17 22:11:40下载
- 积分：1
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585813_weno-codes
说明： weno格式多种精度的 黎曼问题和双马赫反射问题求解，可直接运行(The solution of the Riemann problem and the double Mach reflection problem with various accuracy in the WENO scheme, which can be operated directly)
- 2019-12-18 23:03:47下载
- 积分：1
