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          LS-DYNA 隱式分析培訓

LS-DYNA IMPLICIT MECHANICS: CAPABILITIES AND LIMITATIONS

一：LS-DYNA 隱式方法：求解能力和局限性

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

隱式或顯式：如何選擇有效的解決方案

II.) Theoretical underpinnings of LS-DYNA Implicit LS-DYNA 隱式的理論基礎

a. Linear Implicit 隱式線性

b. Nonlinear Implicit 隱式非線性

III.) Implementation of LS-DYNA Linear Implicit LS-dyna 隱式線性算法的實現

a. Keyword Selection 關鍵字選擇

b. Recommended elements 推薦的單元算法

c. What options are required and what are optional需要哪些必須選項，哪些是可選的

d. Typical Keyword decks 典型的關鍵字

IV.) Implementation of LS-DYNA Non-Linear implicit LS-dyna 隱式非線性算法的實現

a. Keyword Selection 關鍵字選擇

b. Recommended elements 推薦的單元算法

c. What options are required and what are optional需要哪些必須選項，哪些是可選的

d. Typical Keyword decks 典型的關鍵字

V.) Post-Processing Linear and Nonlinear Stress Results 后處理線性和非線性應力結果

a. Extracting high-resolution implicit stress results 隱式應力結果的提取

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

后處理下顯式與隱式應力結果的差異

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

疑難解答：我們多年來學到的東西

a. Build exploratory models 建立模型

b. How to de-code LS-DYNA error messages 如何 de-cod 錯誤消息

c. Recommended tips and tricks 推薦的技巧

VII.)How to Self-Learn 如何自學

a. Reference materials available on-line 提供在線參考資料

b. What is provided by LSTC LSTC 提供的資料

c. How to successfully verify your nonlinear model 如何驗證非線性模型

LS-DYNA NONLINEAR IMPLICIT: STATIC AND NONLINEAR DYNAMICS

二：LS-DYNA 隱式非線性：靜態和非線性動力學

I.) Analysis of Nonlinear Structures and Systems with LS-DYNA Implicit LS-DYNA 隱式分析下的非線性結構

a. Basic keywords for nonlinear implicit LS-DYNA analysis LS-DYNA 隱式非線性分析的基本關鍵字

b. Advanced debugging of nonlinear implicit analysis. 隱式非線性分析的高級調試

II.) Data Management of Implicit Analysis Results 隱式分析結果的數據管理

a. File Management, Troubleshooting, Data Storage 文件管理，故障排除，數據存儲

III.) Composite Implicit Analysis 復合材料的隱式分析

a. Modeling Composites for Non-linear Implicit Analysis 隱式非線性分析的復合材料建模

b. Progressive Failure Analysis 漸進失效分析

c. Examples 例題

IV.) Nonlinear Transient Implicit Dynamics 隱式非線性瞬態動力學

a. Implicit Damping 隱式阻尼

b. Setting up efficient nonlinear implicit dynamic analyses 建立有效的非線性隱式動力分析

c. Keyword settings, data management 關鍵字設置、數據管理

V.) Linear vs Nonlinear, Transient Dynamics 線性與非線性，瞬態動力學

a. Theoretical background: It is all about Normal Modes 理論背景：正常模式

i. What are normal modes? 正常模式是什么

ii. Mass Participation and Why It is Important質量參與率及其重要性

iii. Mode Shapes 模態形狀

b. Why the analysis world is ruled by Linear Dynamics 分析由線性動力學所支配

i. Examples from Industry 工業應用案例

ii. When it is appropriate and when it is not 什么時候合適，什么時候不合適

VI.) LS-DYNA Linear Dynamics: Capabilities and Limitations LS-DYNA 線性動力學：能力和局限性

a. Keyword Selection 關鍵字選擇

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 高級非線性隱式、多物理和隱式/顯式轉換分析

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

標準模態前的非線性預加荷載(接觸、螺栓預緊、重力等)

a. Combined Analysis with Implicit Preload, Linear Dynamics and Explicit Termination (Last Stage) 隱式預壓、線性動力學與顯式終止相結合的分析(后階段)

b. Examples: 例題：

II.) Nonlinear Preload with PSD Analysis (Composite Container for Airborne Vehicle Transportation) 基于 PSD 分析的非線性預加載荷(車輛運輸用的復合材料容器)

a. Model setup for Implicit to Linear Dynamics – Keywords 線性動力學隱式模型的建立-關鍵詞

b. Model setup for Implicit to Explicit Switching (bolt preload (implicit) to drop test (explicit) 隱式到顯式切換的模型 (螺栓預緊(隱式)到跌落試驗(顯式)

III.) Multi-Physics with LS-DYNA Nonlinear Implicit Analysis LS-DYNA 隱式非線性分析的多物理

a. Static and Transient Coupled Nonlinear Thermal-Stress Analysis 靜態和瞬態耦合非線性熱-應力耦合分析

b. An example of Coupled Fluid-Structure-Interaction (CFD to Structure) Nonlinear Implicit Analyse 耦合流體-結構的非線性隱式分析實例

a. How to successfully idealize structures and systems for nonlinear implicit analysis 如何將非線性隱式分析的結構和系統理想化

b. When to quit and switch to explicit analysis 何時退出并切換到顯式分析

V.) Review of Standard LS-DYNA Keyword Card Setup 標準 LS-DYNA 關鍵字的設置

a. What you need for Linear, Static Implicit線性的，靜態的隱式需要哪些

i. What you need for Nonlinear, Static Implicit 非線性靜態隱式需要什么？

i. What you need for Nonlinear, Static Implicit

非線性靜態隱式需要什么？

ii. What you need for Nonlinear, Transient Implicit

(*CONTROL_IMPLICIT_DYNAMICS – alpha setting)

非線性，瞬態隱式需要什么(*CONTROL_IMPLICIT_DYNAMICS-α 設置)

iii. What you need for Linear Dynamics 線性動力學需要什么

1. Normal Modes 標準模態模型

2. Sine Sweep 正弦掃描

3. Response-Spectrum (Shock) 反應譜(沖擊)

4. PSD 功率譜密度;

5. Fatigue 疲癆

b. Linear Dynamics Final Review Workshop 線性動力學后檢查

i. How to setup an efficient Linear Dynamics Analysis 如何建立有效的線性動力學分析模型

ii. Troubleshooting 發現并修理故障

iii. How to Self-Learn如何自學

VI.) Future of LS-DYNA Implicit LS-DYNA 隱式的未來

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