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generalJacobianMatrix
6自由度自由漂浮空间机械臂运动学建模，广义雅克比矩阵(6 degrees of freedom of the free-floating space manipulator kinematics modeling, generalized Jacobian matrix)
- 2020-12-30 16:58:59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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opflatestedition
跟踪中心轨迹内点法最优潮流程序 实现了有功损耗最小的经济分配。
本程序用ieee14节点网络测试(Interior point method OPF program to achieve the minimum power loss of economic distribution. The program ieee14 node network test)
- 2021-03-23 20:49:15下载
- 积分：1
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air-age
计算流体力学软件FLUENT计算空气龄的udf文件(FLUENT CFD software udf file to calculate the air age )
- 2015-10-14 15:32:41下载
- 积分：1
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uFVM
利用matlab实现的部分CFD功能的代码，很有参考价值(Matlab to achieve part of the CFD function of the code, a very valuable reference)
- 2021-02-19 20:19:43下载
- 积分：1
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FFT
利用FFT估计正弦信号的频率,要估计一个叠加了高斯白噪声的正弦信号 的频率 ，可以通过对x(n)做傅里叶变换，得到频谱图，找出幅度的最大值对应的频率值 ，进行多次变换，求出均方误差 。改变信噪比SNR，通过仿真可以得出随着信噪比增加，均方误差减小。(Sinusoidal signal using FFT frequency estimation, to estimate a Gaussian white noise superimposed on the frequency of sinusoidal signals, can be achieved by x (n) be the Fourier transform to get spectrum to identify the magnitude of the frequency value corresponding to the maximum , several transformations, find the mean square error. Change the signal to noise ratio SNR, the simulation can be drawn as the SNR increases, the mean square error decreases.)
- 2011-04-26 10:53:04下载
- 积分：1
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ISO_VOR
求解二维平面等熵涡的matlab程序，计算流体力学，MacCormack格式，均匀网格(Solving two-dimensional plane isentropic vortex matlab program, computational fluid dynamics, MacCormack format, uniform grid)
- 2020-12-08 18:59:20下载
- 积分：1
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fortran_MD
Fortran编的关于分子动力学模拟的程序(Fortran programs compiled on the molecular dynamics simulations)
- 2014-02-26 22:16:23下载
- 积分：1
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huxiangguan
基于互相关分析的时延估计算法；基于互相关分析的时延估计算法(cross-correlation analysis for time delay calculation)
- 2020-10-25 16:40:00下载
- 积分：1
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smallest
这是数值计算当中最小二乘法的例子，在matlab中实现(This is the numerical calculations of the least squares method, for example to achieve Matlab)
- 2006-06-07 23:54:29下载
- 积分：1
