Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Measuring the vibration in car panels to reduce metal fatigue

19.03.2003


With each new vehicle, the car industry faces a fresh battle to cut out the unwanted vibrations that cause irritating rattles and the metal fatigue that can cause parts to break, with potentially lethal consequences.

The complexity of the problems persuaded the German automobile giant BMW to team up with smaller partners to find a new way of designing new vehicles. It got together with Belgian companies LMS International, a world market leader in noise and vibration engineering, optics specialist Labor Dr Steinbichler and the Free University of Brussels in the EUREKA project HOLO-MODAL.

HOLO-MODAL has developed a new way of measuring the way car body panels vibrate that combines traditional vibration measurement with the latest holographic techniques.



Traditional measurement of vibration relies on attaching sensors to a test panel. However, it only measures the vibration at the sensor and attaching too many sensors changes the way the panel moves, altering the results. To gain an accurate picture of the whole panel’s response to vibration, you need to be able to see the effect on every part of the panel’s surface at the same time and without affecting the results. This is where holographic techniques come in.

Holographic analysis avoids physical contact with the test panel by illuminating the whole panel with a laser beam. By measuring the light that is reflected by the panel, the system produces a high-resolution 3-dimensional image of the whole surface as it vibrates.

The HOLO-MODAL partners designed a software package that combines traditional and holographic techniques, controls the hardware and shows how to incorporate the technique into early design work. Now car makers can design body panels that are safer, more durable and save development costs spent on vibration and noise control.

The computer models developed from the measurement data allow the effect of any design changes to be predicted and hence they allow users the chance to try out alternative solutions "on the computer" before actually building them In this way the system helps the development of design solutions.

This new technology can also be used to help design a new generation of safer, more durable and quieter domestic and office appliances and consumer electronic products.

Dr Herman van der Auweraer, project leader at LMS International, says none of the partners could have succeeded on their own.

“EUREKA allowed us to define and work towards a common goal of mutual interest," says van der Auweraer. "The partnership combined complementary capabilities and know-how in structural modelling and laser holography. This combination of technologies was critical to the development of the solution; however neither party had both skills available. The synergy was therefore essential for the success of the project."

"It is however also very relevant that the project combined end-user know-how and research direction. This ensured that the research and development efforts were focused on the real problems and not on academic topics.”

Nicola Vatthauer | alfa
Further information:
http://www.eureka.be/holomodal

More articles from Automotive Engineering:

nachricht When your car knows how you feel
20.12.2017 | FZI Forschungszentrum Informatik am Karlsruher Institut für Technologie

nachricht Did you know how many parts of your car require infrared heat?
23.10.2017 | Heraeus Noblelight GmbH

All articles from Automotive Engineering >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Artificial agent designs quantum experiments

On the way to an intelligent laboratory, physicists from Innsbruck and Vienna present an artificial agent that autonomously designs quantum experiments. In initial experiments, the system has independently (re)discovered experimental techniques that are nowadays standard in modern quantum optical laboratories. This shows how machines could play a more creative role in research in the future.

We carry smartphones in our pockets, the streets are dotted with semi-autonomous cars, but in the research laboratory experiments are still being designed by...

Im Focus: Scientists decipher key principle behind reaction of metalloenzymes

So-called pre-distorted states accelerate photochemical reactions too

What enables electrons to be transferred swiftly, for example during photosynthesis? An interdisciplinary team of researchers has worked out the details of how...

Im Focus: The first precise measurement of a single molecule's effective charge

For the first time, scientists have precisely measured the effective electrical charge of a single molecule in solution. This fundamental insight of an SNSF Professor could also pave the way for future medical diagnostics.

Electrical charge is one of the key properties that allows molecules to interact. Life itself depends on this phenomenon: many biological processes involve...

Im Focus: Paradigm shift in Paris: Encouraging an holistic view of laser machining

At the JEC World Composite Show in Paris in March 2018, the Fraunhofer Institute for Laser Technology ILT will be focusing on the latest trends and innovations in laser machining of composites. Among other things, researchers at the booth shared with the Aachen Center for Integrative Lightweight Production (AZL) will demonstrate how lasers can be used for joining, structuring, cutting and drilling composite materials.

No other industry has attracted as much public attention to composite materials as the automotive industry, which along with the aerospace industry is a driver...

Im Focus: Room-temperature multiferroic thin films and their properties

Scientists at Tokyo Institute of Technology (Tokyo Tech) and Tohoku University have developed high-quality GFO epitaxial films and systematically investigated their ferroelectric and ferromagnetic properties. They also demonstrated the room-temperature magnetocapacitance effects of these GFO thin films.

Multiferroic materials show magnetically driven ferroelectricity. They are attracting increasing attention because of their fascinating properties such as...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

10th International Symposium: “Advanced Battery Power – Kraftwerk Batterie” Münster, 10-11 April 2018

08.01.2018 | Event News

See, understand and experience the work of the future

11.12.2017 | Event News

Innovative strategies to tackle parasitic worms

08.12.2017 | Event News

 
Latest News

Thanks for the memory: NIST takes a deep look at memristors

22.01.2018 | Materials Sciences

Radioactivity from oil and gas wastewater persists in Pennsylvania stream sediments

22.01.2018 | Earth Sciences

Saarland University bioinformaticians compute gene sequences inherited from each parent

22.01.2018 | Life Sciences

VideoLinks Wissenschaft & Forschung
Overview of more VideoLinks >>>