Between A Solid Mass Of 19 Kg And Floor Two Slab Of Isolator Natural Rubber And Felt Are Kept In Series As Shown In Fi 1 (37.97 KiB) Viewed 26 times
Between A Solid Mass Of 19 Kg And Floor Two Slab Of Isolator Natural Rubber And Felt Are Kept In Series As Shown In Fi 2 (8.46 KiB) Viewed 26 times
Between a solid mass of 19 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 110 Ns/m. The felt slab has a stiffness of 12300 N/m and an equivalent viscous damping coefficient of 150 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 (12 marks)
m = 19 kg rubber felt
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