(b) 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 Ql(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,S00 N/m and an equivalent viscous damping coefficient of 1TO Ns/m. (i) Sketch the single degree of freedom spring-mass-damper system (1i) Determine the undamped and damped natural frequencies of the system in the vertical direction. Neglect the mass of the isolator Note Q1(b): The values of P, Q. R, S, and T depend on the respective 2nd, 3rd, 4th. 5h, and 6 digits of your matric number as in the following number format: AD XPQRST. For example, if your matric number is AD 170154 gives the value P = 7, Q = 0, R = 1, S = 5, and T = 4, thus the solid mass is 17 kg, rubber slab stiffness is 3000 N/m, rubber slab viscous damping coefficient is 111 Ns/m, felt slab stiffness is 12,500 N/m and felt slab viscous damping coefficient is 140 Ns/m.

(b) 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 Ql(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,S00 N/m and an equivalent viscous damping coefficient of 1TO Ns/m. (i) Sketch the single degree of freedom spring-mass-damper system (1i) Determine the undamped and damped natural frequencies of the system in the vertical direction. Neglect the mass of the isolator Note Q1(b): The values of P, Q. R, S, and T depend on the respective 2nd, 3rd, 4th. 5h, and 6 digits of your matric number as in the following number format: AD XPQRST. For example, if your matric number is AD 170154 gives the value P = 7, Q = 0, R = 1, S = 5, and T = 4, thus the solid mass is 17 kg, rubber slab stiffness is 3000 N/m, rubber slab viscous damping coefficient is 111 Ns/m, felt slab stiffness is 12,500 N/m and felt slab viscous damping coefficient is 140 Ns/m.

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter24: Expansion Devices

Section: Chapter Questions

Problem 9RQ: The three factors that determine the capacity of a T XV are ______, ______, and _____.

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