Aes - ccm mode use counter mode application simple , systematic expense little , may raise the efficiency of encryption . aes algorithm is presented in allusion to differential cryptanalysis and linear analysis . therefore , the security of aes algorithm in current stage have enough guarantee 而aes算法是针对差分分析和线性分析提出的,它的最大优点是可以给出算法的最佳差分特征的概率及最佳线性逼近的偏差界,具有抵抗差分密码分析及线性密码分析的能力,因此aes算法的安全性在现阶段是有足够保障的。
The methods considering the elastoplasticity are the elastic - plastic hinge method and the pseudo load method . based on the need of non - linear analysis , researchers brought forward nonlinear calculation methods to control the iterative constringency , such as the load controlling method , the displacement controlling method , the arc length controlling method and the pseudo load method 考虑弹塑性的分析方法有:弹性-塑性铰法和虚拟荷载法根据非线性研究分析的需要,研究人员先后提出了:荷载控制法、位移控制法、弧长控制法和做功控制法等控制迭代收敛的非线性计算方法。
Based on fea analysis software - ansys , this text discussed the application of the command fluid and ansys parametric design language to solve , and some foundational problems with commonness in analysis , for example , parametric modeling , setting material property , carving up mesh , importing boundary condition and physics property , and post disposal of the result and so on ; and apply this to the actual problems in weld , quenching and static linear analysis 本文论述了基于大型有限元分析软件ansys平台下,运用命令流及apdl参数化设计语言编程求解、分析问题时所涉及的一些带有共性的基础性问题,如参数化建模、材料属性的设置、网格的划分、边界条件及物性系数的引入、计算结果的后处理等;并将其运用于焊接、工件淬火、线性静力分析等实际问题。
Three circumstances on the geometric non - linear analysis are considered : the sag phenomenon of cables the nonlinear behavior of bending members and the geometry change due to large displacement . the non - linear behavior of cables is verified by introduced the ernst cable modulus of elasticity and cr formation is applied to analyze the non - linear of beams . an incremental - iterative method based on the newton - raphson method is adopted here to solve the non - behavior equations 几何非线性分析主要考虑三个方面:索的垂度效应、梁柱效应和结构大位移,其中:索的非线性分析采用ernst弹性模量对索材料的弹性模量进行修正,计及索的垂度效应的方法;梁单元的非线性分析采用cr列式法,计算中采用基于newton - raphson法的增量迭代方法求解非线性方程组。
This paper brings out the mechanics calculating model of the shear model . four factors are considered in the linear analysis of the static behavior of the shear model . they are the parting number of height , the parting number of width , the type of pole and the type of shear diaphragm 本文建立了受剪板式薄壁结构的“肋-板”抗剪单元的力学计算模型,对于该计算模型,主要考虑了四个因素对抗剪单元在线弹性范围内静力性能的影响,即杆件规格、受剪板规格、高度方向等分数和宽度方向等分数。