Abaqus / ETABS & SAP2000 / Finite Element Method [有限元法] / Midas / My Software [我的软件] / Programming [编程] / Simulation Analysis [仿真分析] / Structural Analysis [结构分析] / Structural Engineering [结构工程]

[FEM][Midas][Abaqus][Midas2Abaqus] 平面框架屈曲分析(经典例题)(Buckling Analysis of Plane Frame)

实干、实践、积累、思考、创新。 一道框架屈曲分析例题，例题来源《SAP2000技术指南及工程应用 上册》，例题如下图所示。 框架柱底铰接，柱顶作用竖直向下的集中荷载P。其中E=200GPa，L=6m，I=6.572×10-5m4。据此可以计算对称和反对称失稳的理论屈曲荷载。反对称失稳，屈曲荷载 P =2.104EI/L2=768kN，对称失稳，屈曲荷载P=14.66EI/L2=5353kN。即理想情况下，反对称失稳相对于对称失稳更加容易。原文给出了SAP2000的分析结果。以下分别采用 Midas Gen 及 Abaqus进行该例题的模拟计算。 Midas Gen Model Midas Gen Results （a）一阶屈曲模态（反对称失稳，屈曲因子：768.19，与理论计算结果吻合。) （b）二阶屈曲模态（对称失稳，屈曲因子：5352.72，与理论计算结果吻合。) （c）三阶屈曲模态（屈曲因子：6952.45) Midas2Abaqus Model 为了进行Abaqus分析，采用 Midas2Abaqus 软件进行模型转换，Midas2Abaqus模型如下。在Midas2Abaqus补充设置相关的参数，如工况参数等，即可导出Abaqus INP 模型，用于后续的Abaqus分析。 Abaqus Model Abaqus Results …

Abaqus / Finite Element Method [有限元法] / Midas / Nonlinear FEM [非线性有限元] / Programming [编程] / Research [科研] / Simulation Analysis [仿真分析] / Solid Mechanics [固体力学] / Steel Structure [钢结构] / Structural Analysis [结构分析] / Structural Engineering [结构工程]

[FEM][Midas][Abaqus][Midas2Abaqus] 圆柱壳非线性曲屈分析 (Nonlinear Buckling Analysis of a Cylinder Shell in Abaqus)

坚持实干、坚持一线、坚持积累、坚持思考，坚持创新。

Abaqus / Simulation Analysis [仿真分析]

[Abaqus][FEM][结构分析] Abaqus提示“Period cannot be used within set …”

坚持实干、坚持一线、坚持积累、坚持思考，坚持创新。 Abaqus 提示 “Period cannot be used within set, surface, orientation, instance, and assembly names….”错误，模型无法导入，如下图，经过检查，是因为定义Set的时候名字出现了点 “.”，Abaqus在定义名字的时候不允许使用点符号。 注释 ( Comments )   ( 如果您发现有错误，欢迎批评指正。邮箱：jidong_cui@163.com . 如果您喜欢这篇博文，请在上面给我 点个赞 吧！ 🙂   🙂      ( If you found any mistakes in the …

Abaqus / Finite Element Method [有限元法] / Midas / My Software [我的软件] / Simulation Analysis [仿真分析] / Steel Structure [钢结构] / Structural Analysis [结构分析] / Structural Engineering [结构工程]

[FEM][Midas][Abaqus][Midas2Abaqus] 钢柱屈曲分析 (Buckling Analysis of Steel Column)

实干、实践、积累、思考、创新。 底部固支的H型钢悬臂柱，顶部竖直向下作用轴压力，分析构件的屈曲模态。为了考虑翼缘或腹板的局部屈曲，可采用壳单元进行建模。本例分别采用Midas Gen及Abaqus软件进行模拟。 Midas Gen Model Midas Gen Results （a）一阶屈曲模态（屈曲因子：8.24E+005)（绕工字钢的弱轴） （b）二阶屈曲模态（屈曲因子：1.976E+006）（绕工字钢的强轴） （c）三阶屈曲模态（屈曲因子：1.976E+006）（绕工字钢轴向扭转） Midas2Abaqus Model 为了进行Abaqus分析，采用Midas2Abaqus软件进行模型转换。 Abaqus Model Abaqus Results （a）一阶屈曲模态（屈曲因子：8.26583E+005)（绕工字钢的弱轴） （b）二阶屈曲模态（屈曲因子：1.98061E+006）（绕工字钢的强轴） （c）三阶屈曲模态（屈曲因子：1.976E+006）（绕工字钢轴向扭转） 由以上两个软件分析结果可知，Midas Gen及Abaqus的分析结果基本一致，一阶屈曲模态为绕工字钢的弱轴，二阶屈曲模态为绕工字钢的强轴，三阶屈曲模态为绕工字钢轴向的扭转屈曲。 微信公众号 ( Wechat Subscription) 欢迎关注 “结构之旅” 微信公众号

Abaqus / Finite Element Method [有限元法] / Midas / My Software [我的软件] / Programming [编程] / Simulation Analysis [仿真分析] / Steel Structure [钢结构] / Structural Analysis [结构分析] / Structural Design [结构设计] / Structural Engineering [结构工程]

[FEM][Abaqus][Midas][分析][工具] Midas2Abaqus模型转换工具

The page you current visit has been moved to: http://www.jdcui.com/?page_id=10470 最新内容已移步到这个页面: http://www.jdcui.com/?page_id=10470 程序图标 ( Program LOGO ) 程序介绍 ( Program Introduction) Midas Gen 模型转 Abaqus模型的工具 （Midas Gen Model to Abaqus Model） 程序图例 ( Program Gallery ) …

Abaqus / ETABS & SAP2000 / Finite Element Method [有限元法] / MATLAB / My Software [我的软件] / Programming [编程] / Simulation Analysis [仿真分析] / Structural Analysis [结构分析] / Structural Design [结构设计] / Structural Engineering [结构工程]

[FEM][有限元][编程][Matlab][Code by myself] FEM Analysis: 2D Truss Element [有限元分析: 2D桁架单元]

（和小伙伴，一起给大家带来有限元编程案例。） 程序作者 ( Author) JiDong Cui (崔济东) 1, XueLong Shen (沈雪龙)2 1.广州容柏生建筑结构设计事务所；2.华南理工大学建筑设计研究院 问题描述( Problem Description) 节点1处为固定铰支座，节点4处为滑动铰支座，节点5、6、7处分别受到-y方向P=100000N的集中力作用；结构中各杆件采用相同的规格，其中弹性模量E=200000MPa，截面积A=4532mm2。 基于MATLAB编程实现该桁架结构的弹性静力分析，并将MATLAB的计算结果与SAP2000、Midas Gen分析结果进行对比。 MATLAB 编程 SAP2000 Midas Gen ABAQUS   可以看出，MATLAB编程计算结果是和 SAP2000,MidasGen 及 Abaqus计算结果是完全一致的。 注释 ( Comments ) …

Abaqus / Finite Element Method [有限元法] / Simulation Analysis [仿真分析] / Structural Analysis [结构分析] / Structural Design [结构设计] / Structural Engineering [结构工程]

[Abaqus][Midas2Abaqus] Abaqus Example: Nonlinear Buckling Analysis of Cylinder [Abaqus实例:圆筒汽缸的非线性曲屈分析]

(忙完后马上更新….)     注释 ( Comments )   ( 如果您发现有错误，欢迎批评指正。邮箱：jidong_cui@163.com . 如果您喜欢这篇博文，请在上面给我 点个赞 吧！ 🙂   🙂      ( If you found any mistakes in the post, please let me know. Email : jidong_cui@163.com. If you like this posts, please give me …

Abaqus / Finite Element Method [有限元法] / Midas / My Software [我的软件] / Programming [编程] / Simulation Analysis [仿真分析] / Structural Analysis [结构分析] / Structural Design [结构设计] / Structural Engineering [结构工程]

[Midas Gen][ABAQUS][Midas2Abaqus] Midas Gen Verification Example Eigen-9: Eigenvalue and static analysis of a 5- level pyramid building under lateral loads [ Midas Gen 验证实例 Eigen-9: 5层金字塔结构的特征值分析及侧向水平力静力分析]

【1】Problem Description ( Midas Gen Verification Example Eigen-9: Eigenvalue and static analysis of a 5- level pyramid building under lateral loads) Perform the eigenvalue analysis of a pyramid building. Calculate …

Abaqus / Finite Element Method [有限元法] / Midas / My Software [我的软件] / Programming [编程] / Simulation Analysis [仿真分析] / Solid Mechanics [固体力学] / Structural Analysis [结构分析] / Structural Design [结构设计] / Structural Engineering [结构工程]

[Midas Gen][ABAQUS][Midas2Abaqus] Verification Example GNL-1: Geometric nonlinear analysis of a high arch structure [ Midas Gen 验证实例 GNL-1: 高拱结构的几何非线性分析]

【1】Problem Description ( Midas Gen’s Verification Examples GNL-1:  Geometric nonlinear analysis of a high arch structure) Obtain load-displacement relation curves at the point of load application on a 100 m radius, …

Abaqus / Finite Element Method [有限元法] / Midas / My Software [我的软件] / Programming [编程] / Simulation Analysis [仿真分析] / Structural Analysis [结构分析] / Structural Engineering [结构工程]

[Midas Gen][ABAQUS][Midas2Abaqus] Verification Example Eigen-13: Eigenvalue analysis of cantilever cylindrical vault [ Midas Gen 验证实例 Static-13: 圆柱形拱顶特征值分析]

【1】Problem Description ( Midas Gen’s Verification Examples Static-13:  Eigenvalue analysis of cantilever cylindrical vault) 【2】MODEL Properties Dimension Radius 0.6096 m Element Plate element Material Modulus of elasticity E = 2.0658×10 5 …

Abaqus / Finite Element Method [有限元法] / Simulation Analysis [仿真分析] / Structural Analysis [结构分析] / Structural Design [结构设计] / Structural Engineering [结构工程] / Structural Optimization [结构优化]

[优化][ABAQUS][Midas2Abaqus] Topology Optimization of a clamped-clamped beam by Abaqus [两端固支梁拓扑优化分析算例]

做个简单的优化小例子，后续有时间继续再做深入研究吧。这些都是拓扑优化届最初级最初级的小例子。很多书本都可以看到。 先从最简单的拓扑优化开始。后续陆续分享一些实际工程的优化案例，贴近工程的一些优化思路及软件开发应用案例。 【1】Midas Gen Model 【2】Midas2Abaqus Model 【3】Abaqus Model 【4】Optimization Results 优化目标：刚度最大化。 约束条件：体积优化 50%。 (1) Step 5 (2) Step 10 (3) Step 25 (4) Strain Energy 到25步后，结构基本稳定。可以看出优化后的结构的轮廓。 后续再继续深入研究。 微信公众号 ( Wechat Subscription) 欢迎关注 “结构之旅” 微信公众号

Abaqus / ETABS & SAP2000 / Finite Element Method [有限元法] / Midas / Nonlinear FEM [非线性有限元] / Programming [编程] / Simulation Analysis [仿真分析] / Solid Mechanics [固体力学] / Structural Analysis [结构分析] / Structural Design [结构设计] / Structural Engineering [结构工程]

[Midas Gen][ABAQUS][Midas2Abaqus] Verification Example Static-31: Elliptic membrane under uniformly distributed load [ Midas Gen 验证实例 Static-31: 椭圆薄膜受均布荷载]

【1】Problem Description ( Midas Gen’s Verification Examples Static-31:  Elliptic membrane under uniformly distributed load) An elliptical membrane of thickness, t and geometrical properties is subjected to a uniformly distributed outward pressure. …

Abaqus / Finite Element Method [有限元法] / Midas / Nonlinear FEM [非线性有限元] / Programming [编程] / Simulation Analysis [仿真分析] / Solid Mechanics [固体力学] / Structural Analysis [结构分析] / Structural Design [结构设计] / Structural Engineering [结构工程]

[Midas Gen][ABAQUS][Midas2Abaqus] Verification Example GNL-6: Snap-back Nonlinear problem [ Midas Gen 验证实例GNL-6: Snap-back 非线性问题]

【1】Problem Description (GNL-6: Snap-back Nonlinear problem from Midas Gen’s Verification Examples) Draw the load-displacement graph. 【2】MODEL Properties Dimension Length 2500 m Element Truss element Material Modulus of elasticity E = …

Abaqus / Finite Element Method [有限元法] / Midas / My Software [我的软件] / Nonlinear FEM [非线性有限元] / Programming [编程] / Research [科研] / Simulation Analysis [仿真分析] / Solid Mechanics [固体力学] / Structural Analysis [结构分析] / Structural Engineering [结构工程]

[Midas Gen][ABAQUS][Midas2Abaqus] Verification Example GNL-5: Snap-through Analysis of simply 2D truss [ Midas Gen 验证实例GNL-5: 2D桁架的阶跃分析]

【1】Problem Description (GNL-5: Snap-through Analysis of simply 2D truss from Midas Gen’s Verification Examples) A truss element is subjected to a vertical load at the node 2. Draw the load-displacement …

Abaqus / Dynamics [动力学] / Earthquake Engineering [地震工程] / Finite Element Method [有限元法] / Midas / My Software [我的软件] / Programming [编程] / Simulation Analysis [仿真分析] / Solid Mechanics [固体力学] / Structural Analysis [结构分析] / Structural Engineering [结构工程]

[Midas Gen][ABAQUS][Midas2Abaqus] Verification Example Eigen-15: Eigenvalue analysis of simply supported thin annular plate [ Midas Gen 验证实例Eigen-15: 简支薄圆板的特征值分析]

【1】Problem Description A simply supported thin annular plate is analyzed to determine the first 10 natural frequencies. Determine the natural frequencies and mode shapes. ( This model is original come …

Abaqus / Finite Element Method [有限元法] / Midas / My Software [我的软件] / Programming [编程] / Reinforced Concrete [钢筋混凝土] / Simulation Analysis [仿真分析] / Structural Analysis [结构分析] / Structural Design [结构设计] / Structural Engineering [结构工程]

[Midas Gen][ABAQUS][Midas2Abaqus] Tut-4: Hammerhead Pier [ Midas Gen tut-4: 锤头桥墩]

【1】Problem Description (from ) 【2】Midas Gen Model [ Tut-4: Two column hammerhead Pier from Midas Gen’s Tutorials ] Load Case – Vertical Load: Load Case – Seismic Load: 【3】Midas 2 …

Abaqus / Earthquake Engineering [地震工程] / Finite Element Method [有限元法] / Midas / My Software [我的软件] / Programming [编程] / Simulation Analysis [仿真分析] / Steel Structure [钢结构] / Structural Analysis [结构分析] / Structural Engineering [结构工程]

[Midas Gen][ABAQUS][Midas2Abaqus] Tut-2: Plant Structure[ Midas Gen tut-2: 厂房结构]

(马上更新…)         注释 ( Comments )   ( 如果您发现有错误，欢迎批评指正。邮箱：jidong_cui@163.com . 如果您喜欢这篇博文，请在上面给我 点个赞 吧！ 🙂   🙂      ( If you found any mistakes in the post, please let me know. Email : jidong_cui@163.com. If you like this posts, please …

Abaqus / Finite Element Method [有限元法] / Midas / My Software [我的软件] / Programming [编程] / Simulation Analysis [仿真分析] / Steel Structure [钢结构] / Structural Analysis [结构分析] / Structural Design [结构设计] / Structural Engineering [结构工程]

[Midas Gen][ABAQUS][Midas2Abaqus] Tut-1: 3-D Simple 2–Bay Frame [ Midas Gen tut-1: 单层两跨三维框架]

【1】Problem Description ( This model is original come from Midas Gen’s Tutorials – Tut-1. ) 【2】Midas Gen Model [ Tut-1: 3-D Simple 2–Bay Frame from Midas Gen’s Tutorials ] Load …

Abaqus / Finite Element Method [有限元法] / Midas / My Software [我的软件] / Simulation Analysis [仿真分析] / Steel Structure [钢结构] / Structural Analysis [结构分析] / Structural Engineering [结构工程]

[ABAQUS][FEM][Midas] Buckling Analysis of Steel Box Beam [钢箱梁的特征值屈曲分析]

Buckling Analysis of Steel Box Beam [钢箱梁的特征值屈曲分析] 【1】Midas Gen Model 【2】Midas2Abaqus 【3】Abaqus Model 【4】Midas Gen Results (1) Buckling Mode 1 (2) Buckling Mode 2 (3) Buckling Mode 3 (4) Buckling …

Abaqus / Dynamics [动力学] / Finite Element Method [有限元法] / Simulation Analysis [仿真分析] / Steel Structure [钢结构] / Structural Analysis [结构分析] / Structural Engineering [结构工程]

[ABAQUS][Midas][FEM] Modal Analysis of Steel Box Beam [钢箱梁的模态分析]

Modal Analysis of Steel Box Beam [钢箱梁的模态分析] 【1】Midas Gen model 【2】Midas2Abaqus Model 【3】Abaqus Model 【4】Midas Gen Results (1) Mode 1 (2) Mode 2 (3) Mode 3 【5】Abaqus Results (1) Mode …

Finite Element Method [有限元法] / Midas / Simulation Analysis [仿真分析] / Steel Structure [钢结构] / Structural Analysis [结构分析] / Structural Design [结构设计] / Structural Engineering [结构工程]

[Midas Gen][结构分析] 带加劲肋钢板有限元分析

工字型钢为主梁，槽钢为铰接次梁，铺设钢板，钢板铰接支撑在钢梁上。左模型钢板底设置角钢加劲肋，间距500mm，右模型为纯钢板。整个结构尺寸为1000mmx2800mm，钢板施加竖向均布荷载。 整体模型 钢梁 钢板竖向位移 （左模型，角钢的最大竖向位移为2mm，最大相对位移为1.5mm，角钢挠度为 1/（1.5/1000）=1/666；钢板的最大竖向位移为2.2mm，分布于跨中，最大相对位移为0.3mm，相应的挠度为1/（0.3/500）=1/1666；右模型：跨中位移最大，最大竖向位移为17.4mm，最大相对位移为17mm，相应的板的挠度为 1/(17/1000)=1/58。） 钢板的Von-Mises应力 （左模型：钢板的最大应力为60Mpa，主要集中在角钢端部的局部范围；右模型：钢板的最大应力为83Mpa，主要集中在跨中较大范围。） 注释 ( Comments )   ( 如果您发现有错误，欢迎批评指正。邮箱：jidong_cui@163.com . 如果您喜欢这篇博文，请在上面给我 点个赞 吧！ 🙂   🙂      ( If you found any mistakes in the post, please let me know. Email : jidong_cui@163.com. If you …