Between a solid mass of 10 kg and floor, two slab of isolator, natural rubber and felt are kept in series as shown in Fi
Posted: Fri Apr 29, 2022 10:07 am
Between a solid mass of 10 kg and floor, two slab of
isolator, natural rubber and felt are kept in series as shown in
Figure Q1(b). The natural rubber slab has a stiffness of 3000 N/m
and an equivalent viscous damping coefficient of 112 Ns/m. The
felt slab has a stiffness of 12,500 N/m and an equivalent viscous
damping coefficient of 160 Ns/m. (i) Sketch the single degree of
freedom spring-mass-damper system (2 marks) (ii) Determine the
undamped and damped natural frequencies of the system in the
vertical direction. Neglect the mass of the isolator
isolator, natural rubber and felt are kept in series as shown in
Figure Q1(b). The natural rubber slab has a stiffness of 3000 N/m
and an equivalent viscous damping coefficient of 112 Ns/m. The
felt slab has a stiffness of 12,500 N/m and an equivalent viscous
damping coefficient of 160 Ns/m. (i) Sketch the single degree of
freedom spring-mass-damper system (2 marks) (ii) Determine the
undamped and damped natural frequencies of the system in the
vertical direction. Neglect the mass of the isolator