Dynamic Amplification Factor
The Dynamic Amplification Factor (DAF)
, also sometimes called the Dynamic Load Factor (DLF)
is defined as the ratio of the displacement obtained when a load is applied dynamically compared to the displacement obtained when the load is applied statically.
The DAF is a function of the shape of the pulse, the duration of the pulse td
and the natural period of the structure T
. The following graphs give the value of DAFs for a range of pressure pulses.
Triangular Pressure Pulses
Shock Triangular Pressure Pulses (tr / td = 0.0)
In a shock triangular pulse the rise time tr
is 0, i.e. the peak pressure is reached instantaneously.
Isosceles Triangular Pressure Pulse (tr / td = 0.5)
In an isosceles triangular pulse the rise time tr
is half of the pulse duration td
Rectangular Pressure Pulses