Dynamics

In the area of dynamics, we are working to evaluate the dynamic properties of constructions. We carry out field measurements, vibration tests and calculations. The aim would be to verify a design mechanical strength, identify a vibration environment to see if the electrical equipment to be deployed in this will work or through indirect measurement of dynamic properties of other characteristics of a structure, such as built-in forces.

SP has equipment and expertise to

  • perform field measurements and analyze measurement results with regard to the lifespan of structures and equipment. Examples of such analysis is to propose time-rushed service life tests.
  • conduct vibration tests. We have both electrodynamic vibrators for traditional vibration and shock tests on servo-hydraulic vibration table for simulating earthquakes and vehicle vibration.
  • perform dynamic calculations on the structures

Examples of completed projects

  

Field measurement of vibrations in a bow door arm to investigate if there is a risk of fatigue.

 

 

 

 

 
 

FE calculation of earthquake durability of a large battery stand. As input to the FE model used the results from tests of small battery stands. 

 

 

 

Calculation of shock process in a container. Upper image shows results from a real sample and the lower result from a calculation.

The full-scale attempt to look for it through the measurement of the wavelength of a propagating bending wave in railway rails is possible to estimate the axial forces in the rail. If possible method would be used to estimate the risk for heat distortion.



 

 

 

 

 

 

 

 

 
 

 

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Contact Persons

Gunnar Kjell

Phone: +46 10 516 52 23

RISE Research Institutes of Sweden, Phone 010-516 50 00, E-mail info@ri.se

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