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 A Jetsons future? Assessing the role of flying cars in sustainable mobility
10.04.2019 | University of Michigan

nachricht Solid state batteries for tomorrow's electric cars
22.02.2019 | Fraunhofer-Institut für Silicatforschung ISC

All articles from Automotive Engineering >>>

The most recent press releases about innovation >>>

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

Im Focus: Explosion on Jupiter-sized star 10 times more powerful than ever seen on our sun

A stellar flare 10 times more powerful than anything seen on our sun has burst from an ultracool star almost the same size as Jupiter

  • Coolest and smallest star to produce a superflare found
  • Star is a tenth of the radius of our Sun
  • Researchers led by University of Warwick could only see...

Im Focus: Quantum simulation more stable than expected

A localization phenomenon boosts the accuracy of solving quantum many-body problems with quantum computers which are otherwise challenging for conventional computers. This brings such digital quantum simulation within reach on quantum devices available today.

Quantum computers promise to solve certain computational problems exponentially faster than any classical machine. “A particularly promising application is the...

Im Focus: Largest, fastest array of microscopic 'traffic cops' for optical communications

The technology could revolutionize how information travels through data centers and artificial intelligence networks

Engineers at the University of California, Berkeley have built a new photonic switch that can control the direction of light passing through optical fibers...

Im Focus: A long-distance relationship in femtoseconds

Physicists observe how electron-hole pairs drift apart at ultrafast speed, but still remain strongly bound.

Modern electronics relies on ultrafast charge motion on ever shorter length scales. Physicists from Regensburg and Gothenburg have now succeeded in resolving a...

Im Focus: Researchers 3D print metamaterials with novel optical properties

Engineers create novel optical devices, including a moth eye-inspired omnidirectional microwave antenna

A team of engineers at Tufts University has developed a series of 3D printed metamaterials with unique microwave or optical properties that go beyond what is...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Revered mathematicians and computer scientists converge with 200 young researchers in Heidelberg!

17.04.2019 | Event News

First dust conference in the Central Asian part of the earth’s dust belt

15.04.2019 | Event News

Fraunhofer FHR at the IEEE Radar Conference 2019 in Boston, USA

09.04.2019 | Event News

 
Latest News

New automated biological-sample analysis systems to accelerate disease detection

18.04.2019 | Life Sciences

Explosion on Jupiter-sized star 10 times more powerful than ever seen on our sun

18.04.2019 | Physics and Astronomy

New eDNA technology used to quickly assess coral reefs

18.04.2019 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>