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Korean
There are three types of dynamic analysis stages: the
eigen-value analysis, the earthquake spectrum analysis, the time history
analysis and the ground motion analysis. The eigen-value stage computes the
vibration modes susceptible. The earthquake spectrum stage obtains the
combined mode responses using SRSS or CQC methods. The time history stage allow
you to define the time-load function and to apply the dynamic load which is
obtained by multiplying the specfied load by the load function, to the point or
the elements. The ground motion analysis simulates the earthquake response in
time domain.
The eigenvalue stage requires only the analysis control
data and the mass density in the material property data. The earthquake spectrum
stage requires the mode combination method and its sub-data in addition to the
data required by the eigenvalue analysis.
The time history stage requires the following additional
data:
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In the menu Misc / Load
function, define the load function (load-time
history).
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In the menu Layer / Point
Force Layer or Layer / Surface Force Layer
, input the load to be multiplied by the load function.
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In the menu FEM / Stage
Configuration (Additional input for this stage), input the time step,
the number of time steps, the save time interval and so on.
The ground motion stage requires the following additional
data:
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In the menu Misc / Ground
motion function, define the ground motion function (acceleration-time
history).
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In the menu FEM / Stage
Configuration (Additional input for this stage), input the time step,
the number of time steps, the save time interval and so on.
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