Objective
This application oriented seminar is designed to help users already familiar with LS-DYNA (and the ALE method) get more proficient at using the more complex features of ALE and fluid-structure interaction (FSI) modeling.
This is a 2-day seminar. Day 1 is for reviewing some critical ALE features, FSI usage & basic concepts. In the remaining time, more complicated examples are discussed. Simulation techniques for each model will be reviewed. We will also discuss model fine-tuning and procedures for debugging models, such as ways to deal with FSI leakage. Boundary and initial conditions, mesh resolution design, etc. will also be covered. This is a hands-on training class.
A range of possible LS-DYNA ALE-FSI examples is shown below covering a wide area of applications. However, there likely will not be enough time to cover all listed examples. So depending on the interests of the attendees, the instructor will select some examples in the list below and discuss them in detail. Examples other than those listed may also be referred to to clarify certain modeling concepts when necessary. Please indicate the examples that are of interest to you upon registration so they can be prepared. All input files to models discussed in class will be made available to the attendees for reviewing at their convenience.
Notes
The instructor for this course is Dr. Ian Do. This is a very hands-on seminar. For each example model:
- The instructor will define the physics of the problem.
- Then the attendees are expected to conceptually construct a detailed pseudo-input file for the model themselves (pencil-paper).
- Afterward, we will go over the modeling details together.
The attendees will get out of this class as much as she/he is willing to put into it. The hope is with enough hand notes on each pseudo model constructed, the attendees will be able to create the actually models themselves if they choose to. Please note that due to the huge amount of output for the models and long run time, the attendees will not have time to run the models in class. The goal is to be able construct each model conceptually. Result review may be done during the discussion of each model.
Possible Examples
Basic Concepts (< 1 day)
- (01) Introduction
- (02) ALE Multi-Material Group (AMMG) concepts and applications
- (03) Fluid-Structure Interaction (FSI) concepts
- (04) Initial and boundary condition set up with ALE element formulation (ELFORM=11)
- (05) Material failure modeling
- (06) Information on typical unit systems and references
Possible ALE Models to be Discussed
- (11) Soda can drop
- (12) Tank sloshing and impact
- (13) Extrusion
- (15) Bird strike fan blade assembly model
- (16) Projectile-target penetration modeling
- (17) Simple flow in flexible tube
- (21) Hydrostatic pressure initialization
- (22) Wave impacting floating “ship” (simple model)
- (23) Cylinder (Rocket booster) impacting water model
- (27) Tanker floating and moving through water
There may be a couple of examples related to modeling of energetic materials that are available and may be discussed depending on the attendees’ interest (some security restrictions will apply). Please contact Ian if you are interested in this area of analysis.