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(b) Between a solid mass of 19 kg and floor, two slab of isolator, natural rubber and felt are kept in series as shown i
Posted: Fri Apr 29, 2022 10:08 am
by answerhappygod
- B Between A Solid Mass Of 19 Kg And Floor Two Slab Of Isolator Natural Rubber And Felt Are Kept In Series As Shown I 1 (38.51 KiB) Viewed 21 times
(b) 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 12,200 N/m and an equivalent viscous damping coefficient of 130 Ns/m. Sketch the single degree of freedom spring-mass-damper system (3 marks) (ii) Determine the undamped and the damped natural frequencies of the system in vertical direction. Neglect the mass of the isolator (11 marks)