At present. running safety in railway vehicles against flange-climb derailment is evaluated based on derailment quotient. This approach is preferred because measuring contact forces between wheel and rail is relatively easier than measuring the contact condition. and the dynamic condition of the contact forces can theoretically determine whether the wheel climbs the rail or not. https://ashleyshomestores.shop/product-category/outdoor-armless-chair-with-cushion-set-of-2/