Abaqus / FEM Analysis of Structural Components [构件有限元模拟] / Finite Element Method [有限元法] / 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 / Finite Element Method [有限元法] / Programming [编程] / Reinforced Concrete [钢筋混凝土] / Structural Analysis [结构分析] / Structural Design [结构设计] / Structural Engineering [结构工程]

Abaqus 出现“The area of XXX elements is zero, small, or negative”错误提示

Abaqus “提示单元面积为零，很小或者为负数” 错误，如下所示： The area of 2500 elements is zero, small, or negative. Check coordinates or node numbering, or modify the mesh seed. The elements have been identified in element …

Abaqus / ETABS & SAP2000 / FEM Analysis of Structural Components [构件有限元模拟] / Finite Element Method [有限元法] / Midas / Nonlinear FEM [非线性有限元] / Programming [编程] / 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 / FEM Analysis of Structural Components [构件有限元模拟] / Finite Element Method [有限元法] / Midas / Nonlinear FEM [非线性有限元] / Programming [编程] / 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 / FEM Analysis of Structural Components [构件有限元模拟] / 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] / 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] / FEM Analysis of Structural Components [构件有限元模拟] / Finite Element Method [有限元法] / Midas / My Software [我的软件] / Programming [编程] / 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 / FEM Analysis of Structural Components [构件有限元模拟] / Finite Element Method [有限元法] / Midas / My Software [我的软件] / Programming [编程] / Reinforced Concrete [钢筋混凝土] / 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] / FEM Analysis of Structural Components [构件有限元模拟] / Finite Element Method [有限元法] / Midas / My Software [我的软件] / Programming [编程] / 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 / FEM Analysis of Structural Components [构件有限元模拟] / Finite Element Method [有限元法] / Midas / My Software [我的软件] / Programming [编程] / 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 / Structural Analysis [结构分析] / Structural Design [结构设计] / Structural Engineering [结构工程]

[Midas Gen][ABAQUS][Midas2Abaqus] Static-11: 2-D Plane Truss [Static 11: 2-D 平面桁架 Verification Examples]

【1】Problem Description Determine the vertical displacements of a plane truss structure subjected to concentrated loads.[ Static-11 from the Verification Example of Midas Gen] 【2】Midas Gen Model [ Static-11 from the …

Abaqus / FEM Analysis of Structural Components [构件有限元模拟] / Finite Element Method [有限元法] / Midas / My Software [我的软件] / 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] / FEM Analysis of Structural Components [构件有限元模拟] / Finite Element Method [有限元法] / 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 …

FEM Analysis of Structural Components [构件有限元模拟] / Finite Element Method [有限元法] / Midas / 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 …

FEM Analysis of Structural Components [构件有限元模拟] / Finite Element Method [有限元法] / My Software [我的软件] / Programming [编程] / Structural Analysis [结构分析] / Structural Engineering [结构工程]

[有限元][编程][日记] PFSAP: 平面框架弹性静力分析程序

旧博客（2013年）中的日记，当初学习有限元时候做的笔记，现转移到 www.jdcui.com 备份！！！ 最近一段时间决定开始认真地去学有限元了，基本的理论应该认真地去学好，很重要，没有理论为前提，研究很难深入下去，且根本无法去应用，更别说把程序当成工具了，简直就是被程序玩弄。所以，要多看书，多思考，多动手， 学习基本理论。 为此，初学FEM的过程中，写了个十分十分简单的小程序：PFSAP，即平面框架结构分析程序。前两天刚刚完成。PFSAP包括简单的前后处理，通过图形操作建立模型，可以进行一般的平面桁架、刚架、组合结构的静力分析，类似结构力学求解器，当然功能简单很多。做这个东西主要是想体验一下。以下是程序界面： 下面测试一个简单的桁架例子，参考教材 — 同济大学朱慈勉老师编的《结构力学》下册，例8-1桁架例子。 （1）建立模型，指定支座，施加节点荷载。 （2）分析，查看变形图 （3）查看轴力图 （3）查看支座反力   记录一下，改天再详细测试一下其他的例子 😯 …… 小结：学习有限元，动手实践很重要，实践包括用通用的有限元程序去操作，也包括自己编些小程序来体验；因为公式都是那样，不同的书虽然讲得有深有浅，但是当你看多了以后，看懂了以后，再继续看下去单纯从书面来获得的东西就越来越少了，这时候如果能动手实践一下，那么理解会更加深刻，也能够明白里面的一些比较关键的东西。所以我认为，学任何东西都有下面一个过程：听懂->看懂->做出来->创造。这几个过程都叫“懂”了，但是懂的深度是逐渐加深的，当然要想向着更高的高度发展，要付出越来越多的精力和努力。 附上【Video】 微信公众号 ( Wechat Subscription) 欢迎关注 “结构之旅” 微信公众号

Abaqus / Dynamics [动力学] / Finite Element Method [有限元法] / Nonlinear FEM [非线性有限元] / Performance Based Seismic Design [抗震性能设计] / Structural Analysis [结构分析] / Structural Design [结构设计] / Structural Engineering [结构工程]

【弹塑性分析笔记】 ABAQUS弹塑性楼板损伤结果解读

结构弹塑性分析可以较好地反映结构的薄弱部位。大震弹塑性分析和小震设计、中大震拟静力分析具有一定的可比性。如图是YJK的拟静力楼板应力分析结果及ABAQUS大震分析的损伤结果，弹塑性分析反映了结构的薄弱部位。

Abaqus / Dynamics [动力学] / Earthquake Engineering [地震工程] / Finite Element Method [有限元法] / Nonlinear FEM [非线性有限元] / Structural Design [结构设计] / Structural Engineering [结构工程]

ABAQUS超高层结构大震弹塑性时程分析笔记

ABAQUS 做整体分析比较花时间，计算也需要花很多时间，因此，每个过程均需要十分细心，因为错了从来时间成本太大。 不管是前处理建模，还是后处理分析，还有超限文本撰写，都应该是建立在对结构理解的基础上，不能论文一个操作员，能简化，能提高效率的地方就要提高效率，尽量把更多时间用在把握和理解结构机理、结构特性、建立结构概念基础上。

Abaqus / FEM Analysis of Structural Components [构件有限元模拟] / Finite Element Method [有限元法] / Structural Design [结构设计]

Abaqus 有限元节点模拟小结

Abaqus 有限元节点模拟小结，记录几点小体会：（1）网格质量十分影响收敛（2）约束条件的设置影响计算结果（3）熟悉 .INP文件 可以提高工作效率（4）应该建立良好的个人习惯，有助于修改模型、查找问题。接下来 做进一步 归纳和对比，提高效率… … from 崔济东，www.jdcui.com, CJD, JidongCui

Earthquake Engineering [地震工程] / ETABS & SAP2000 / Finite Element Method [有限元法] / Programming [编程] / Structural Engineering [结构工程]

SAP2000截面设计器中截面分析实例 [Sectional Analysis Example in SAP2000 Section Designer]

符东龙 师弟 整理的SAP2000截面分析资料 ！！！ 🙂 🙂 算例与博文《Sectional Modeling and Analysis Example of CAD to XTRACT Program [CAD to XTRACT 插件开洞截面建模与分析实例]》一致，以一个开洞截面为例，介绍在SAP2000上建模分析结构截面的过程包括弯矩曲率分析，PMM分析，还有一个十分具体的Step by Step过程。from 崔济东，崔济东的博客，www.jdcui.com, CJD, JidongCui

Dynamics [动力学] / Earthquake Engineering [地震工程] / Finite Element Method [有限元法] / PERFORM-3D / Reinforced Concrete [钢筋混凝土] / Structural Engineering [结构工程]

混凝土受拉本构对结构动力时程分析结果的影响[The effects of the concrete tensile constitutive on structural dynamic time hisotry analysis]

为对比小震情况下混凝土抗拉刚度对结构分析的影响，测试三种本构对结构分析的影响：（1）不考虑受拉本构；（2）真实考虑受拉的影响；（3）受拉本构按弹性考虑。以下测试中，所有模型使用的单元类型均一致，均采用纤维梁柱模型，变化的只是受拉部分的本构。通过这两个小例子可以定性说明：（1）一般情况，忽略混凝土的受拉本构，对结构的整体响应分析结果影响不大（虽然这个测试的是小震）。（2）即便结构基本处于弹性（应变小于钢筋和混凝土的屈曲应变），混凝土的受拉区按弹性考虑时的结构整体响应分析结果可能和真实考虑混凝土受拉时的分析结果相差很大。因此反过来也可以说，平时在一般结构分析软件中，采用弹性单元进行小震动力弹性时程分析获得的结构整体响应可能和真实响应相差很大。from 崔济东，崔济东的博客，www.jdcui.com, CJD, JidongCui

Abaqus / Finite Element Method [有限元法] / Reinforced Concrete [钢筋混凝土] / Structural Engineering [结构工程]

[Tool] Calculation of Concrete Damage and Plastic Deformation based on Chinese Code for Design of Concrete Structures [工具]基于中国规范的ABAQUS混凝土损伤与塑性变形计算软件

[Tool] Calculation of Concrete Damage and Plastic Deformation based on Chinese Code for Design of Concrete Structures [工具]基于中国规范的ABAQUS混凝土损伤与塑性变形计算软件。from 崔济东，崔济东的博客，www.jdcui.com, CJD, JidongCui

Abaqus / Earthquake Engineering [地震工程] / Finite Element Method [有限元法] / Reinforced Concrete [钢筋混凝土] / Structural Design [结构设计] / Structural Engineering [结构工程]

Earthquake acceleration time history analysis in Abaqus (Abaqus地震加速度时程分析)

Earthquake acceleration time history analysis in Abaqus (Abaqus地震加速度时程分析)。采用Abaqus的Standard求解器做个弹性框架结构的地震时程分析小例子，框架模型取用前面博文《Modal analysis of a frame using Abaqus (Abaqus框架模态分析)》模态分析中的框架结构，暂不讨论阻尼的作用，不考虑框架荷载和重力，输入单向地震波如下图所示，其中地震波按基底加速度的方式施加。