Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:


Measuring the vibration in car panels to reduce metal fatigue


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:

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: Space observation with radar to secure Germany's space infrastructure

Satellites in near-Earth orbit are at risk due to the steady increase in space debris. But their mission in the areas of telecommunications, navigation or weather forecasts is essential for society. Fraunhofer FHR therefore develops radar-based systems which allow the detection, tracking and cataloging of even the smallest particles of debris. Satellite operators who have access to our data are in a better position to plan evasive maneuvers and prevent destructive collisions. From April, 25-29 2018, Fraunhofer FHR and its partners will exhibit the complementary radar systems TIRA and GESTRA as well as the latest radar techniques for space observation across three stands at the ILA Berlin.

The "traffic situation" in space is very tense: the Earth is currently being orbited not only by countless satellites but also by a large volume of space...

Im Focus: Researchers Discover New Anti-Cancer Protein

An international team of researchers has discovered a new anti-cancer protein. The protein, called LHPP, prevents the uncontrolled proliferation of cancer cells in the liver. The researchers led by Prof. Michael N. Hall from the Biozentrum, University of Basel, report in “Nature” that LHPP can also serve as a biomarker for the diagnosis and prognosis of liver cancer.

The incidence of liver cancer, also known as hepatocellular carcinoma, is steadily increasing. In the last twenty years, the number of cases has almost doubled...

Im Focus: Researchers at Fraunhofer monitor re-entry of Chinese space station Tiangong-1

In just a few weeks from now, the Chinese space station Tiangong-1 will re-enter the Earth's atmosphere where it will to a large extent burn up. It is possible that some debris will reach the Earth's surface. Tiangong-1 is orbiting the Earth uncontrolled at a speed of approx. 29,000 km/h.Currently the prognosis relating to the time of impact currently lies within a window of several days. The scientists at Fraunhofer FHR have already been monitoring Tiangong-1 for a number of weeks with their TIRA system, one of the most powerful space observation radars in the world, with a view to supporting the German Space Situational Awareness Center and the ESA with their re-entry forecasts.

Following the loss of radio contact with Tiangong-1 in 2016 and due to the low orbital height, it is now inevitable that the Chinese space station will...

Im Focus: Alliance „OLED Licht Forum“ – Key partner for OLED lighting solutions

Fraunhofer Institute for Organic Electronics, Electron Beam and Plasma Technology FEP, provider of research and development services for OLED lighting solutions, announces the founding of the “OLED Licht Forum” and presents latest OLED design and lighting solutions during light+building, from March 18th – 23rd, 2018 in Frankfurt a.M./Germany, at booth no. F91 in Hall 4.0.

They are united in their passion for OLED (organic light emitting diodes) lighting with all of its unique facets and application possibilities. Thus experts in...

Im Focus: Mars' oceans formed early, possibly aided by massive volcanic eruptions

Oceans formed before Tharsis and evolved together, shaping climate history of Mars

A new scenario seeking to explain how Mars' putative oceans came and went over the last 4 billion years implies that the oceans formed several hundred million...

All Focus news of the innovation-report >>>



Industry & Economy
Event News

New solar solutions for sustainable buildings and cities

23.03.2018 | Event News

Virtual reality conference comes to Reutlingen

19.03.2018 | Event News

Ultrafast Wireless and Chip Design at the DATE Conference in Dresden

16.03.2018 | Event News

Latest News

For graphite pellets, just add elbow grease

23.03.2018 | Materials Sciences

Unique communication strategy discovered in stem cell pathway controlling plant growth

23.03.2018 | Agricultural and Forestry Science

Sharpening the X-ray view of the nanocosm

23.03.2018 | Physics and Astronomy

Science & Research
Overview of more VideoLinks >>>