Simulation is more than Software

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Structural mechanics
Structural mechanics
Scalability of simulations

Matching Dynamic Simulations with Testing

Systematic approach to reverse engineering

Overview

Training Expert

Learn how to use optiSLang to determine uncertain model parameters, e.g. by comparing simulated modes with an EMA. This training is offered as a 1-day course.

Duration
1 day

Prerequisites
Basic knowledge of Ansys Mechanical, Basic knowledge in Ansys optiSLang

Software used
Ansys Mechanical, Ansys optiSLang

Benefits
  • Performing model calibration using an experimental modal analysis
  • Identifying the influences of key calibration parameters
  • Calibration of vibratory systems with the NVH toolkit
  • Strategies for calibration of oscillating systems

Description

In many applications, the validation of simulation models through the matching of experimental data is a necessary prerequisite for high-quality virtual product development. The systematic identification of unknown and uncertain input parameters for the simulation of available measurement results plays a central role in this process. In this course, you will receive suggestions and many practical tips on how to combine the "best of both worlds" with testing and simulation.

You will learn the methodical implementation of typical calibration tasks for eigenmodes, and natural frequencies of oscillating systems based on common application scenarios. This will enable you to develop your own model update workflow based on experimental modal analyses.

This training course is aimed at computational engineers who want to determine unknown simulation parameters based on measurements, and who are eager to improve the accuracy of their simulation results.

Detailed agenda for this 1-day training

Day 1

01 Systematic approach to successful matching

  • Fundamental aspects of reverse engineering
  • Types of uncertainties in measurements and simulations
  • Strategy for successful matching
  • Explanation of objective functions for curve fitting
  • Demo: Adjustment of an oscillator using Microsoft Excel and Ansys optiSLang

02 Experimental modal analysis (EMA)

  • Test execution: dynamic excitation, vibration measurement of the frequency response
  • Determination of the mode shapes and natural frequencies
  • Data blocks from a universal file format (UNV, UFF)
  • Workshop: Visualizing UNV data in Ansys Mechanical

03 Calibration of eigenmodes

  • Correlation criteria for mode shapes (MAC: Modal Assurance Criterion)
  • Import of UNV test data (format 55)
  • Working with the RSTMAC command in Ansys Mechanical APDL
  • EMA-FEM optimization strategy: model orientation, mode pairing, target function
  • Workshop: Reverse engineering of a 3D structure using experimental data for natural frequencies and eigenmodes

04 Calibration of frequency responses

  • Correlation criteria for frequency responses (FRAC: Frequency Response Assurance Criterion)
  • Import of UNV test data (format 58)
  • Working with the RSTMAC command for FRF correlation in Ansys Mechanical APDL
  • Optimization strategies for frequency response matching: Signal Processing, Target Function
  • Workshop: Frequency response fitting for a component

Your Trainers

Daniel Soukup
CAE Engineer, CADFEM Germany GmbH, Grafing
Dr. sc. Jörg Helfenstein
Head of Seminars, CADFEM (Suisse) AG, Aadorf

Placement in the CADFEM Learning Pathway

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Do you have questions on the training?

When will I receive the final confirmation for my training booking?

Straight after you sign up, an automatic confirmation of receipt will be sent to the email addresses you provided. Once you have successfully verified the data you provided, you will receive your personalized sign-up confirmation, containing further information on course fees, the billing address, etc., by email within two to three working days.  

As soon as the minimum number of attendees has been reached, you will receive a final training confirmation containing further information. If you have booked an on-site training, we recommend that you wait until you have received this final confirmation before booking your travel and accommodation.

If the minimum number of attendees is not reached, we reserve the right to cancel the training seven days before it is due to start at the latest. We are happy to inform you on changing your booking to an alternative date. Please note that we accept no liability for hotel or travel bookings that attendees have already made.

When is the sign-up deadline for a training?

Training places will generally be allocated based on the order in which attendees sign up. For this reason, we always recommend booking for your desired date as early as possible.

As long as a coures still has free places, it can be booked.

At what time do the training courses begin and end?

Usually the training courses start at 9:00 am and end at 5:00 pm of the respective local time. The actual course times will be stated in the booking confirmation. Please note that, depending on the training host, there may be a possible time shift between your and the provider's local time. Therefore all local times are provided with the valid time shift to Greenwich Mean Time (GMT). 

Head of Seminars
Dr. sc. Jörg Helfenstein