Qualities in Öllöv SoftStep
Ladda ner
Typ
Examensarbete för kandidatexamen
Bachelor Thesis
Bachelor Thesis
Program
Publicerad
2018
Författare
Jönsson, Frida
Salfjord, Amanda
Modellbyggare
Tidskriftstitel
ISSN
Volymtitel
Utgivare
Sammanfattning
The study is commissioned by AB Halmstad Gummi Fabrik/Öllöv and is in collaboration with Chalmers Sports and Technology. The study concerns the rubber shoe Öllöv Soft- Step, which is a result of a development done on the former shoe, Öllöv Original. Öllöv SoftStep has a forged shoe inside the rubber enclosure and a change in the friction surface to provide a grip similar to the unshod hoof. Former studies have shown that rubber shoes and synthetic shoes have a better impact on the hoof’s shock absorbing and expansion qualities. To measure the shock absorbing and vibration damping qualities, a test including two horses wearing Öllöv SoftStep, steel shoes and unshod hooves was made. The test was designed to be able to measure the qualities on two different grounds, concrete and fibre sand, using an accelerometer attached to the horse’s hoof. A logger was attached to the accelerometer with a sampling rate at 7161 points/sec and an associated application connected to an Ipad could process the data during the measurements. The logger provided with raw data which was analyzed in MatLab. The amplitude values was collected in the five steps in the range of 10 m. Every step had maximum and minimum peak which showed the highest amplitude. Average values for each measurements were calculated in Excel. To be able to analyze the visible oscillations, every step in the measurements had to be taken into account to be able to find a pattern in every combination of ground and shoe. When the analysis of the vibrations was conducted, the focus was to find characteristics in the oscillations between the steel shoe, Öllöv SoftStep and an unshod hoof in the impact phase of the step. The analysis of the amplitude showed that Öllöv SoftStep has better shock absorbing qualities than the steel shoe on concrete. Dora’s measurements showed a decrease between 12%-28% and for Empe’s measurements 69%-76% when comparison with the unshod hoof. On fibre sand there were no significant difference between the shoe types. The analysis showed that Öllöv SoftStep has better vibration damping qualities than the steel shoe. Öllöv SoftStep has better vibration damping qualities than the unshod hoof, but significance of the differ is not concluded. Öllöv SoftStep has according to the analysis similar vibration damping qualities in fibre sand as an unshod hoof and a hoof wearing steel shoe.
Beskrivning
Ämne/nyckelord
Fysik , Physical Sciences