Understanding and Simulating Technical Friction Effects
Saving energy, reducing wear or making targeted use of friction
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
- 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
Mohamed Jegham
Placement in the CADFEM Learning Pathway
Participant data
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