Siemens Digital Industries Software

Modal analysis based on full-field data

Siemens Digital Industries Software in Leuven (Belgium) represents the main R&D Center for the Simulation and Test Solutions business segment within Siemens and is responsible for the Simcenter product portfolio. The company is market leader in test and mechatronic simulation solutions. MatchID and Siemens intensively collaborate in the framework of several Flemish regional research projects with the aim to deliver innovative structural dynamics testing solutions.

The unique combination of MatchID and Simcenter Testlab solutions enables the use of DIC for advanced and profound modal analysis purposes with the final objective to achieve a full-field representation of the dynamics of the tested structure. Vibration measurements and Experimental Modal Analysis are often used for design validation of complex mechanical products in automotive, aerospace and other advanced engineering industries.

Traditional measurements are performed by means of sensors connected to the structure and with a wired signal transmission to the central data acquisition system. The idea of performing contactless vibration meas urements using cameras and DIC is appealing because on one side it allows to reduce the instrumentation time and, on the other side, increases the amount of information obtained during the tests. This can be very useful to reach a better understanding of the structural behavior in certain critical parts. An entire Ground Vibration Testing campaign on a full-scale F16 aircraft involving 6 synchronized cameras of different resolutions generated impressive results when compared to accelerometers and Laser Doppler Velocimetry measurements, illustrating the validity of the methodology.

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