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Structural mechanics
Structural mechanics

Understanding and Simulating Technical Friction Effects

Saving energy, reducing wear or making targeted use of friction

Overview

Training Expert

Learn to detect and specifically influence friction-induced vibration phenomena This training is offered as a 2-day course.

Duration
2 days

Prerequisites
Basic knowledge of Ansys Mechanical

Software used
Ansys Mechanical

Benefits
  • Understand the mechanisms of friction-induced vibration phenomena
  • Get to know the essential influencing parameters and simulate their variations
  • Analyze and eliminate noise sources
  • Reduce wear through FEM analyses

Description

In products that consist of many moving parts, friction occurs at contact points. In clutches, brakes and stringed instruments, tribological contacts are part of the functionality, but often they also cause undesirable effects such as heat generation in high-speed motors, noise in a brake system or product wear. About 20% of total global energy consumption results from friction, and an additional 3% is used to recondition worn parts and to replace equipment due to wear-related failures. If friction is considered at an early stage of product development, major economic benefits can be generated.

In this training you will deal with the mechanism behind the most important friction-related phenomena. You will learn to anticipate issues caused by friction in advance or find a comprehensive and sound solution to any problem arising from the operation of your products.

On the first day we will deal comprehensively with friction-induced vibrations, while the second day will focus on noise, heat, and wear aspects. Using practical examples, you will learn the essential parameters that allow you to influence these mechanisms, identify disturbing noise sources and reduce wear. Targeted, practical exercises with Ansys Mechanical will familiarize you with these effects.

Detailed agenda for this 2-day training

Day 1

01 Friction as a cause of vibrations

  • Introducing and classifying friction-induced vibrations
  • Ansys refresher: modal analysis and transient analysis
  • Exercise: modal analysis – vibration modes of a brake disk
  • Exercise: transient analysis – pulse load on a telescopic boom

02 Friction-induced vibration through mode coupling

  • Stabilizing and destabilizing damping effects
  • Description of friction in Ansys Mechanical
  • Evaluating a damped modal analysis in Ansys
  • Exercise: squeaking bar on a rotating disk

03 Friction-induced oscillation due to mode coupling (advanced)

  • Consideration of non-linear preload
  • Solver settings for damped modal analysis
  • Possibilities for increasing performance
  • Exercise: Squealing simulation for a car brake

04 Nonlinear vibration analysis: Stick-slip effect

  • Simulation of nonlinear vibration systems
  • Variation due to speed-dependent friction coefficient
  • Transient analysis of the stick-slip phenomenon
  • Solver and contact settings in Ansys
  • Exercise: Stick-slip of a mass on a conveyor belt

Day 2

05 Stick-slip and structure-borne sound

  • Friction induced structure-borne sound
  • Structure-borne sound evaluation with Ansys
  • Equivalent Radiated Power (ERP) using FFT
  • Exercise: jerking extension of a telescope mechanism

06 Friction induced heat

  • Conversion of friction energy into  heat
  • Application of multiphysics elements
  • Contact settings and definition of relative sliding movement
  • Exercise: Simulation of a friction welding process

07 Friction-induced wear

  • Illustration of wear by Holm’s and Archard's models
  • Identification of material parameters
  • Contact settings and definition of relative sliding movement
  • Evaluation of total sliding distance and wear volume
  • Exercise: Quasi-static wear of a pin-disc removal

08 Other friction-related Ansys features

  • Friction in the joint element
  • Orthotropic friction
  • Friction as a function of variables (temperature, time, pressure)
  • Discussion

Your Trainers

Fendy Kumala
Technical Manager Stuttgart, CADFEM Germany GmbH, Stuttgart
Mohamed Jegham
Engineering Services, CADFEM Germany GmbH, Grafing

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 Professional Development
Dr.-Ing. Marold Moosrainer