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3 Zeszyty Naukowe Politechniki Poznańskiej. Maszyny Robocze i Transport

3 2002

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Vibration of rectangular plate - mathematical modelling and experimental verification

Rusnakova S., Slabeycius J., Kostial P., Cuth V., Vavro J., Rypak M.

Zeszyty Naukowe Politechniki Poznańskiej. Maszyny Robocze i Transport

2002

Nr 54

159-164

For observatory of vibrations of aluminum rectangular plate was used two different methods: mathematical and experimental. Experimental part was done by holograhpy speckle interferometry (HSI). This method - HSI - is very suitable for non-destructive observatory several types of materials - in our experiment is it aluminum rectangular plate. Results of this method - vibration modes - are applicable especially in designing of various structures. Results of the mathematical modeling are suitable for verifing and comparison with results from HSI method - they are very comparisonable. In our mathematical modeling program MARC was used with help of the FEM.

The analysis of the natural frequencies of disc for the tyres in program COSMOS M

Vavro J., Kopecky M., Kostial P., Slabeycius J., Fandakova M., Hajska E., Skulec M.

Zeszyty Naukowe Politechniki Poznańskiej. Maszyny Robocze i Transport

2002

Nr 54

201-206

The model of the tyre disk was created in software Autocad and COSMOS M. There are calculated the first ten eigen frequencies disk in this article with the help of the software COSMOSM.

Experimental investigation of tread compounds frictional properties

Slabeycius J., Kostial P., Letko I., Vavro J., Zverina M., Randa D., Sipos M.

Zeszyty Naukowe Politechniki Poznańskiej. Maszyny Robocze i Transport

2002

Nr 54

165-170

The friction properties of vulcanized rubber were investigated. The friction force between planar sample and chosen surface at various values of sliding velocity and normal pressure was measured. The experimental equipment based on standard tensile machine 1NSTRON 4302 was used. The samples of tread compQunds and some materials (asphalt, concrete, glass, steel) were tested. The experimental dependencies of the friction coefficient to the sliding velocity show good agreement with published experimental and theoretical results.