Flashcards
Ch 4: Spring and Damper Elements in Mechanical Systems
Cards in this deck (14)
- 1Springs connected end-to-end result in an arrangement that is _____ than the springs taken individually.less stiff
- 2A nonlinear spring element does not have _____ because its slope is variable.a single stiffness value
- 3If a system cannot be modeled as a rigid body then a _____ that consists of a partial differential equation must be developed.distributed parameter model
- 4For a mass -spring element, the force due to gravity is canceled out of the EoM by the force in the spring due to its static deflection, as long as the _____ the mass is measured from the equilibrium position.displacement of
- 5Natural frequency is ______ for stiffer springs (larger k values).greater
- 6The amplitude of the oscillation depends on _____.the initial conditions x(0) and x'(0)
- 7Simple harmonic motion is where the _____ is proportional to the displacement but opposite in sign.acceleration
- 8Simple harmonic motion occurs when the restoring force is proportional to the _____.displacement
- 9In simple harmonic motion, when is velocity zero?when displacement and acceleration reach their extreme values
- 10In simple harmonic motion, the magnitude of the acceleration is _____ times that of the magnitude of the displacement.ω^2_n times
- 11In systems with two or more masses, the FBD usually shows only the ______ forces.dynamic
- 12In mass-spring systems with negligible friction and damping, we can often use _____ to obtain the equation of motion and, for simple harmonic motion, to determine the frequency of vibration without obtaining the _____.the principle of conservation of energy, equation of motion
- 13A damping element is an element that resists _____ across it.relative velocity
- 14Damping force always _____ relative velocity.opposes
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- undergraduate Systems and Vibes Flashcards on Ch 4: Spring and Damper Elements in Mechanical Systems, created by David Smith on 10/06/2015.
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- David Smith
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