DYNAMICS OF VIBRATION Flashcards
defined as the oscillating, reciprocating, or other periodic motion of a
rigid or elastic body or
medium forced from a
position or state of
equilibrium
Vibration
Types of Vibration
Free Vibration:
Forced Vibration
Occurs
when a system
oscillates due to an
initial disturbance
without external forces.
Free Vibration:
Occurs when an
external force
continuously drives the
system
Forced Vibration:
Types of Free Vibration
Undamped Free Vibration:
Damped Free Vibration
occurs when energy is
gradually lost due to forces like air resistance or friction, leading to a decrease in the
amplitude over time
Damped Free Vibration
no energy is lost from the
system during oscillation,
meaning the system
continues to vibrate
indefinitely with the same
amplitude
Undamped Free Vibration
Types of Forced Vibration
Undamped Forced
Vibration
Damped Forced
Vibration
the system is driven by an externalforce, but energy is dissipated due to
damping
Damped Forced
Vibration
Undamped Forced
Vibration
the system vibrates due to thecontinuous application of an external force, and no energy is lost
is the simplest representation of a dynamic system, where the motion or displacement of the system can be described by a single variable (degree of freedom)
Single Degree of Freedom (SDOF) Systems
The ______________
assumes that the structure or mechanical system behaves as
a single mass, moving in one direction (either horizontally or
vertically) in response to external forces
SDOF system
is a more complex and realistic model that represents structures or mechanical systems that can move in multiple
independent directions or exhibit more complex motion.
MDOF (Multiple Degrees of Freedom)
System
the process by which a
structure dissipates the energy imparted to it by external forces such
as seismic events or wind.
Damping
The primary
purpose of ___________is to reduce the amplitude of vibrations caused by these
dynamic forces
damping