jisuanqi

大型上用有限元软件ABAQUS的用户自定义材料子程序UMAT，用于计算材料低周疲劳极限和损伤下的应力应变关系(calculating material low cycle fatigue limit)

高斯消元法、高斯列主元消元法解线性方程组。程序由本人独立完全独立完成。版权所有！(Gaussian elimination method out PCA Gaussian elimination method for solving linear equations. I am independent program consists entirely independently. All rights reserved!)

说明：  Galerkin method,a numerical approximate method based on weighted residual method,commonly used in differential equation.(Galerkin method,a numerical approximate method based on weighted residual method,commonly used in differential equation.)

说明：  在matlab实现基于Schmidt的QR分解，共轭梯度法等(QR decomposition based on Schmidt in MATLAB)

有关FFT方面的内容，包括算法原理和程序应用（PDF）(The FFT aspects, including the principles and procedures of application of algorithm (PDF))

通过具有随机结构参数的四分之一车辆模型研究了具有不确定性结构参数的车辆在受到来自道路的随 机激励作用下的振动响应问题。将簧上质量、簧下质量、悬挂阻尼、悬挂刚度以及轮胎刚度均认为是随机变量。将路面的不平整引起的对车辆的激励看作高斯随机过程并通过简单指数功率谱密度来建立力学模型。(By a quarter vehicle model with random parameters studied vehicle structure uncertain structural parameters of the vibration by the random excitation the road response under question. The sprung mass, unsprung mass, suspension damping, suspension stiffness and rigidity of the tire are considered to be random variables. The excitation caused by uneven road vehicle regarded as Gaussian random process and to create a mechanical model of a simple exponential power spectral density.)

thermal damage abaqus-umat subroutine

实现高斯厄米特积分，可以直接更换f函数，得到所求的积分(High the Sie Mitt integral to replace the f function, ask the integral )

这是另一个改进的关于数字预失真功能仿真的matlab程序，效果不错，希望对大家有所帮助。(This is a improved matlab program about function estimation of digital estimation,and it has a good performance,really hope it can help you.)

用于计算Davar，较为方便，用于allan方差的初步学习(Used to calculate Davar, more convenient for the Allan variance of the preliminary study)