In order to improve the anti-impact of hydraulic supports, based on the characteristics of non-dimensional parameters governing the crashworthiness of thin-walled structures proposed by authors, a new type of anti-impact unit, namely the window multi-celled structures(WMCS), was designed by adopting bi-tubular and mixed multi-celled structures. The crashworthiness of anti-impact units with different cross-sectional shapes was systematically investigated by using a combination of experimental tests, simulation analysis and theoretical prediction. The results show that the inner and outer contours of the bi-tubular structures and the number of cells affect the deformation modes of the anti-impact units. As the increase of wall thickness, the energy absorption and initial peak crushing forces of the anti-impact units increase, among which the initial peak crushing forces are highly sensitive. Differently, the specific energy absorption and crushing forces efficiency increase first and then decrease. According to the optimal intersection among deformation modes, force-displacement curves and crashworthiness, the WMCS-C1 with a wall thickness of 5 mm was selected as the anti-impact unit.
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