The force-deflection curve for a composite structure of mass, m = 2000 kg, is shown experimentally. a) Find the hysteresis damping ratio η, the logarithmic δ, and the equivalent damping coefficient Ceq. Need B,C,D b) Find the value of stiffness from the graph in N/mm. c) Assume initial condition of u0 = 1.5mm, v0 = 2mm/sec, determine the free vibration response of this structure. d) Plot the response from part c. Hints: k = 165 N/mm, U (part a) = 4.3mm, η = 0.344, Ceq = 6.25 N.sec/mm, α = 14.15°, U (part b) = 1.52mm.
The force-deflection curve for a composite structure of mass, m = 2000 kg, is shown experimentally. a) Find the hysteresis damping ratio η, the logarithmic δ, and the equivalent damping coefficient Ceq. Need B,C,D b) Find the value of stiffness from the graph in N/mm. c) Assume initial condition of u0 = 1.5mm, v0 = 2mm/sec, determine the free vibration response of this structure. d) Plot the response from part c. Hints: k = 165 N/mm, U (part a) = 4.3mm, η = 0.344, Ceq = 6.25 N.sec/mm, α = 14.15°, U (part b) = 1.52mm.
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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The force-deflection curve for a composite structure of mass, m = 2000 kg, is shown experimentally. a) Find the hysteresis damping ratio η, the logarithmic δ, and the equivalent damping coefficient Ceq.
Need B,C,D
b) Find the value of stiffness from the graph in N/mm. c) Assume initial condition of u0 = 1.5mm, v0 = 2mm/sec, determine the free vibration response of this structure. d) Plot the response from part c. Hints: k = 165 N/mm, U (part a) = 4.3mm, η = 0.344, Ceq = 6.25 N.sec/mm, α = 14.15°, U (part b) = 1.52mm.
Transcribed Image Text:900
700
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-- 200
- 3100
40)
- S00
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--900
-4 -2 0 2
4 6
8
Deflection (mm)
Problems 1 & 2
Force (N)
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