TY JOUR TI WAYS OF IMPROVING THE DESIGN OF THE SUSPENSION ELEMENTS OF THE BASE CHASSIS FIRE AND RESCUE VEHICLES KW stiffness KW damping coefficient KW deflections of springs KW low-frequency resonance KW natural frequency KW sprung mass KW aperiodicity coefficient KW vertical acceleration JO NATURAL AND MAN-MADE RISKS (PHYSICO-MATHEMATICAL AND APPLIED ASPECTS) AU Shirouchov, A.V. PY 2015 IS 2015 PB Saint-Petersburg University of State Fire Service of Emercom of Russia