- Between A Solid Mass Of Ip Kg And Floor Two Slab Of Isolator Natural Rubber And Felt Are Kept In Series As Shown In Fi 1 (46.86 KiB) Viewed 42 times
#vibration
#mechanical engineering
Between a solid mass of IP 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 1IR Ns/m. The felt slab has a stiffness of 12,800 N/m and an equivalent viscous damping coefficient of 1 TO Ns/m. (1) 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 (12 marks) m = 1P kg rubber felt Figure Q1(b) P=8,0=0,R=1,S=9,T=5