Between A Solid Mass Of 1p Kg And Floor Two Slab Of Isolator Natural Rubber And Felt Are Kept In Series As Shown In Fi 1 (70.47 KiB) Viewed 17 times
P=9, Q=0, R=0, S=0, T=4
Between A Solid Mass Of 1p Kg And Floor Two Slab Of Isolator Natural Rubber And Felt Are Kept In Series As Shown In Fi 2 (11.6 KiB) Viewed 17 times
Between a solid mass of 1P 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 3Q00 N/m and an equivalent viscous damping coefficient of 11R Ns/m. The felt slab has a stiffness of 12,800 N/m and an equivalent viscous damping coefficient of 1T0 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
m = 1P kg rubber felt Figure Q1(b)
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