Dynamic Time Analysis
You can use a dynamic time analysis to examine the system’s transient response to time-varying loads.
For a description of, and requirements of a dynamic time analysis see
Dynamic Time Analysis Overview.
The Dynamic Time Analysis Definition dialog box includes the following items:
• Loading—Select Load Functions or Base Excitation.
◦ Load Functions—To use Load Functions, you must have defined loads in your model. If you select Load Functions, The following items are available under Loading:
▪ Sum Load Sets—Combines the effects of the selected load sets into a single load set.
▪ Load Set / Component—Allows you to select the load sets you want to use in your analysis. Click
to create
load set functions for each load set or use the default functions.
◦ Base Excitation—You can use Base Excitation only if you reference a constrained modal analysis in your dynamic analysis.
Base Acceleration Time Dependence—Specifies the direction of motion of the supports and the base acceleration as a function of time when you select
Base Excitation as the type of loading.
The following tabs appear on the dialog box for a dynamic time analysis: