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.

International Edition---engineering Mechanics: Statics, 4th Edition

4th Edition

ISBN:9781305501607

Author:Andrew Pytel And Jaan Kiusalaas

Publisher:Andrew Pytel And Jaan Kiusalaas

Chapter7: Dry Friction

Section: Chapter Questions

Problem 7.61P

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