          LS-DYNA 隐式分析培训

LS-DYNA IMPLICIT MECHANICS: CAPABILITIES AND LIMITATIONS

一：LS-DYNA 隐式方法：求解能力和局限性

I.) Implicit versus Explicit: Picking your battles or How to Select the Most Efficient Solution Technique

隐式或显式：如何选择有效的解决方案

II.) Theoretical underpinnings of LS-DYNA Implicit LS-DYNA 隐式的理论基础

a. Linear Implicit 隐式线性

b. Nonlinear Implicit 隐式非线性

III.) Implementation of LS-DYNA Linear Implicit LS-dyna 隐式线性算法的实现

a. Keyword Selection 关键字选择

b. Recommended elements 推荐的单元算法

c. What options are required and what are optional需要哪些必须选项，哪些是可选的

d. Typical Keyword decks 典型的关键字

IV.) Implementation of LS-DYNA Non-Linear implicit LS-dyna 隐式非线性算法的实现

a. Keyword Selection 关键字选择

b. Recommended elements 推荐的单元算法

c. What options are required and what are optional需要哪些必须选项，哪些是可选的

d. Typical Keyword decks 典型的关键字

V.) Post-Processing Linear and Nonlinear Stress Results 后处理线性和非线性应力结果

a. Extracting high-resolution implicit stress results 隐式应力结果的提取

b. Differences in post-processing explicit versus implicit stress results

后处理下显式与隐式应力结果的差异

VI.) Troubleshooting: What we have learned over the years

疑难解答：我们多年来学到的东西

a. Build exploratory models 建立模型

b. How to de-code LS-DYNA error messages 如何 de-cod 错误消息

c. Recommended tips and tricks 推荐的技巧

VII.)How to Self-Learn 如何自学

a. Reference materials available on-line 提供在线参考资料

b. What is provided by LSTC LSTC 提供的资料

c. How to successfully verify your nonlinear model 如何验证非线性模型

LS-DYNA NONLINEAR IMPLICIT: STATIC AND NONLINEAR DYNAMICS

二：LS-DYNA 隐式非线性：静态和非线性动力学

I.) Analysis of Nonlinear Structures and Systems with LS-DYNA Implicit LS-DYNA 隐式分析下的非线性结构

a. Basic keywords for nonlinear implicit LS-DYNA analysis LS-DYNA 隐式非线性分析的基本关键字

b. Advanced debugging of nonlinear implicit analysis. 隐式非线性分析的高级调试

II.) Data Management of Implicit Analysis Results 隐式分析结果的数据管理

a. File Management, Troubleshooting, Data Storage 文件管理，故障排除，数据存储

III.) Composite Implicit Analysis 复合材料的隐式分析

a. Modeling Composites for Non-linear Implicit Analysis 隐式非线性分析的复合材料建模

b. Progressive Failure Analysis 渐进失效分析

c. Examples 例题

IV.) Nonlinear Transient Implicit Dynamics 隐式非线性瞬态动力学

a. Implicit Damping 隐式阻尼

b. Setting up efficient nonlinear implicit dynamic analyses 建立有效的非线性隐式动力分析

c. Keyword settings, data management 关键字设置、数据管理

V.) Linear vs Nonlinear, Transient Dynamics 线性与非线性，瞬态动力学

a. Theoretical background: It is all about Normal Modes 理论背景：正常模式

i. What are normal modes? 正常模式是什么

ii. Mass Participation and Why It is Important质量参与率及其重要性

iii. Mode Shapes 模态形状

b. Why the analysis world is ruled by Linear Dynamics 分析由线性动力学所支配

i. Examples from Industry 工业应用案例

ii. When it is appropriate and when it is not 什么时候合适，什么时候不合适

VI.) LS-DYNA Linear Dynamics: Capabilities and Limitations LS-DYNA 线性动力学：能力和局限性

a. Keyword Selection 关键字选择

b. What is necessary and what is not 什么是必要的，什么是不需要的

c. How to make it work efficiently 如何使其有效地工作

LS-DYNA ADVANCED NONLINEAR IMPLICIT, MULTIPHYSICS AND COMBINED IMPLICIT/EXPLICIT ANALYSES

三：LS-DYNA 高级非线性隐式、多物理和隐式/显式转换分析

I.) Nonlinear Pre-Load (contact, bolt-preload, gravity, etc.) prior to Normal Modes

标准模态前的非线性预加荷载(接触、螺栓预紧、重力等)

a. Combined Analysis with Implicit Preload, Linear Dynamics and Explicit Termination (Last Stage) 隐式预压、线性动力学与显式终止相结合的分析(后阶段)

b. Examples: 例题：

II.) Nonlinear Preload with PSD Analysis (Composite Container for Airborne Vehicle Transportation) 基于 PSD 分析的非线性预加载荷(车辆运输用的复合材料容器)

a. Model setup for Implicit to Linear Dynamics – Keywords 线性动力学隐式模型的建立-关键词

b. Model setup for Implicit to Explicit Switching (bolt preload (implicit) to drop test (explicit) 隐式到显式切换的模型 (螺栓预紧(隐式)到跌落试验(显式)

III.) Multi-Physics with LS-DYNA Nonlinear Implicit Analysis LS-DYNA 隐式非线性分析的多物理

a. Static and Transient Coupled Nonlinear Thermal-Stress Analysis 静态和瞬态耦合非线性热-应力耦合分析

b. An example of Coupled Fluid-Structure-Interaction (CFD to Structure) Nonlinear Implicit Analyse 耦合流体-结构的非线性隐式分析实例

a. How to successfully idealize structures and systems for nonlinear implicit analysis 如何将非线性隐式分析的结构和系统理想化

b. When to quit and switch to explicit analysis 何时退出并切换到显式分析

V.) Review of Standard LS-DYNA Keyword Card Setup 标准 LS-DYNA 关键字的设置

a. What you need for Linear, Static Implicit线性的，静态的隐式需要哪些

i. What you need for Nonlinear, Static Implicit 非线性静态隐式需要什么？

i. What you need for Nonlinear, Static Implicit

非线性静态隐式需要什么？

ii. What you need for Nonlinear, Transient Implicit

(*CONTROL_IMPLICIT_DYNAMICS – alpha setting)

非线性，瞬态隐式需要什么(*CONTROL_IMPLICIT_DYNAMICS-α 设置)

iii. What you need for Linear Dynamics 线性动力学需要什么

1. Normal Modes 标准模态模型

2. Sine Sweep 正弦扫描

3. Response-Spectrum (Shock) 反应谱(冲击)

4. PSD 功率谱密度;

5. Fatigue 疲痨

b. Linear Dynamics Final Review Workshop 线性动力学后检查

i. How to setup an efficient Linear Dynamics Analysis 如何建立有效的线性动力学分析模型

ii. Troubleshooting 发现并修理故障

iii. How to Self-Learn如何自学

VI.) Future of LS-DYNA Implicit LS-DYNA 隐式的未来

a. LSTC’s Investment in LS-DYNA Implicit and what to expect in future releases