Информация за научни конференции и семинари, посветени на математичното моделиране и компютърната симулация

( май, 2013)

12-TH NATIONAL CONGRESS ON THEORETICAL AND APPLIED MECHANICS

ST. ST. CONSTANTINE AND HELENA

SEPTEMBER 23, 2013 – SEPTEMBER 26, 2013

New: 30 June 2013 abstract submission deadline extended

Joint event: COST FA0904 International Workshop; Registration form; Abstract form

NEW: MS03 FP7-BYNanoERA: Institutional Development of Applied Nanoelectromagnetics (organized by Rumiana Kotsilkova)

First Announcement

The Organizing Committee is pleased to announce that the 12^th National Congress on Theoretical and Applied Mechanics (12NCTAM) will take place in the Black sea resort St. St. Constantine and Helena, Bulgaria, 23-26 September 2013. Since its inception in 1969, the quadrennial congress organized by the National Committee of Theoretical and Applied Mechanics and the Institute of Mechanics - Bulgarian Academy of Sciences has become major scientific event, gathering Bulgarian and foreign scientists and engineeres from academia and industry. At the NCTAM Bulgarian scientists working in the field of mechanics and their colleagues from many foreign countries present latest developments in their research and exchange ideas on all topics of theoretical and applied mechanics. The purpose of the coming 12NCTAM is to provide opportunities for scientists and engineers working in the field of mechanics to exchange new ideas, discuss current research and establish a basis for future collaboration. In addition to plenary lectures and pre-defined sessions there will be a number of mini-symposia that highlight the latest trends in specific and emerging topics.

ANNOUNCEMENTS

COST FA0904 INTERNATIONAL WORKSHOP
COST FA0904 International Workshop will be organized as a joint event with the 12th National Congress on Theoretical and Applied Mechanics, 23-26 September 2013, “Sts. Constantine and Helena Resort” (Varna, Bulgaria). more ...
Posted: 2013-05-14	More...
MINISYMPOSIA
MS01 BEM Modeling Techniques in Solid Mechanics (organized by Petia Dineva) MS02 Multiscale structure-properties relations in materials: modeling and experiments (organized by Svetoslav Nikolov)
Posted: 2013-04-10	More...
PLENARY LECTURES (CONFIRMED)
K. Rajagopal, Texas A&M University: "On implicit constitutive theories to describe the non-linear response of materials" F. L. Chernousko, Institute for Problems in Mechanics, Russian Academy of Sciences: "Dynamics and Optimization of Locomotion of Multibody Systems"
Posted: 2013-04-10	More...
12NCTAM FIRST ANNOUNCEMENT
You may download the 1-st announcement as PDF file here...

3-Day Training Course : Introduction to FEA Analysis

Who Should Attend?

This course is aimed at practicing engineers who wish to learn more about how to apply finite element techniques to their particular problems in the most effective manner. The material that is presented is independent of any particular software package, making it ideally suited to current and potential users of all commercial finite element software systems. This course is a must for all engineers aiming to use FEA as a reliable predictive tool for thermal, stiffness and stress analysis.

Companies moving into FEA technology to improve product designs or assess prototype failures or speed the design process will benefit from sending key engineers to this course. If you have sufficient engineers then a tailor made course may be more suitable. NAFEMS can then work closely with you to cater for your specific industry sector or analysis type.

The course is open to both members and non-members of NAFEMS.

Course Program

Registration will be held on Tuesday morning between 9:00 and 9:30am. We will aim to commence the course at 9am on Wednesday and Thursday and finish by 5pm each evening.

Background to FEA

• Origins of FEA , leading to today’s process
• Emphasis on limitations of a displacement solution
• The route from CAD to Mesh to Solver to Results
• A simple case study – a plate with a hole
• The Analysis Input file
• Simple Element stiffness matrices
• Grid Points , Degrees Of Freedom (DOFs)

Over view of Element Types

• 1d elements
• 2d elements
• 3d elements
• Solid 3D elements: Hex versus Tets, the trade off
• Types of meshing and meshing issues
• I-beam example spanning element types

Making healthy models

• Mis-matched  DOF’S and other issues
• Element distortions – effect on accuracy
• Convergence checking
• Solver and Preprocessor checking
• Post processor checking and the dangers of smoothing
• Stress concentrations and stress singularities
• Window cutout example
• Building an Analysis Process ‘Cheat Sheet’ Part 1

Constraints

• Constraint methods
• Real world boundary conditions
• Poisons effect
• Minimum support 321 method
• Case Study – bracket analysis
• Linear Contact methods – new technology to supplement constraints

Loading Types

• Distributed load, Point Loading
• Real world loading versus FEA
• Bearing load methods
• Nonlinear implications
• Centrifugal and Inertial Loading
• Unit load cases for better understanding
• Case Study – tanker body under cornering and accident loading

Multi Point Constraints (MPCs)

• What are they and why use them?
• Different terminologies and usage
• Soft and rigid load and constraint distribution

Making Life simpler

• Symmetry
• Anti-symmetry  and Axi-symmetry
• Sector Symmetry
• Plane Stress
• Plane strain
• Comparing 1d, 2d, 3d modeling case study of a pressure vessel

Understanding the objective of the analysis

• Clear view of scope of problem – how do we tackle it
• Resource and timescale factors
• FEA Analysis objectives – reservoir case study
• Class exercise develop an analysis strategy

Looking at CAD geometry

• Why not use 20 million elements
• Trade offs
• De-featuring
• The reality of CAD models
• Manual methods of meshing
• Building an Analysis Process ‘Cheat Sheet’ Part 2

Engineering Assessment

• Anticipate the load paths 
• Free body Diagrams
• Force Balance
• Review of Stress and Load fundamentals
• Revisiting the I-Beam, comparing theory with FEA

Checking the answers

• Ways of checking the results
• What type of stress do I use?
• Review of fundamentals
• Post Processing and More Checking
• Other Checks
• Class Exercise – review an FE report

Other Topics (dependent on requirements)

• Buckling
• Introduction to Non-linear Analysis
• Introduction to Dynamics and Normal Modes Analysis
• Introduction to Composite Analysis

Conclusions

• Review of the Class exercise – developed Analysis Process ‘Cheat Sheet’
• Debrief 

Basic Dynamic FE Analysis

July 31st - September 4th 2013

Five-week online training course (including one week break)
one 2.5-hour session per week

sessions take place at 09:00 EDT, 06:00 PDT, 14:00 BST, 15:00 CEST

Engineering Board PDH Credits: 12.5 hours*

Course expanded and developed from four sessions to five

Register at the earlybird price of $346 for members and $518 for non-members until July 17th, thereafter prices revert to $432 for members and $648 for non-members

REGISTER TODAY TO TAKE ADVANTAGE OF YOUR DISCOUNTED RATE

Who Should Attend?

This course is aimed at practicing engineers who wish to learn more about how to apply finite element techniques to dynamic analysis in the most effective manner. Ideally a student should have some experience of FEA analysis, but this is not essential. The material that is presented is independent of any particular software package, making it ideally suited to current and potential users of all commercial finite element software systems. This course is a must for all engineers aiming to use FEA as a reliable predictive tool for dynamic analysis.

E-learning classes are ideal for companies with a group of engineers requiring training. E-learning classes can be provided to suit your needs and timescale. Contact us to discuss your requirements.

Course Program

Note: Each session represents one 2-hour session each week (Note: Sessions may last for 2.5-3 hours, including the Q&A sessions.) Recordings of each session are made available to course attendees in the event they are unable to participate in one or more of the live meetings, or if they wish to review the material following each session. 

Basic Dynamics

Session BD1 - Wednesday 31st July 2013

09:00 EDT, 06:00 PDT, 14:00 BST, 15:00 CEST

• Finite Element Analysis Overview
• Introduction to Dynamics
• FEA Basic Principals
• Undamped Single Degree of Freedom Systems
• Equation of Motion and Normal Modes
• Mapping to FEA with basic elements
• Extending to Multiple Degrees of Freedom
• Eigenvalue extraction, background and FEA implementation
• Importance of Mode Identification – use of post processing
• Examples with a range of structures, 1D to 3D.
• Homework 

Session BD2 - Wednesday 7th August 2013

09:00 EDT, 06:00 PDT, 14:00 BST, 15:00 CEST

• Homework Review
• Importance of Mass modeling
• Introduction to Modal Effective Mass
• Meshing quality
• Rigid Body Modes
• Typical Errors
• QA for normal modes analysis
• Forensic workshops on models with errors
• Modal Correlation
• Reduction Methods
• Examples
• Homework

Session BD3 - Wednesday 14th August 2013

09:00 EDT, 06:00 PDT, 14:00 BST, 15:00 CEST

• Homework Review
• Overview of Response Analysis 
• Modal and direct methods
• Introduction to Forcing Functions and Damping
• Damped, Forced Single Degrees of Freedom
• Equation of Motion revisited
• Mapping to FEA with Basic elements
• Extending to Multiple Degrees of Freedom
• Examples
• Homework

NO SESSION ON WEDNESDAY AUGUST 21ST

Session BD4 - Wednesday 28th August 2013

09:00 EDT, 06:00 PDT, 14:00 BST, 15:00 CEST

• Homework Review
• Transient Analysis background
• Workshops with Transient Analysis
• Accurate time step prediction, results checking, aliasing
• Managing a large Transient Analysis
• Frequency Response Analysis background
• Workshops with Frequency Response Analysis
• Checking Frequency response, importance of peaks and spectral spread
• Managing a large Frequency Response Analysis
• Examples
• Homework