Time-history analysis provides for linear or nonlinear evaluation of dynamic structural response under loading which may vary according to the specified time function. Dynamic equilibrium equations, given by K u(t) + C d/dt u(t) + M d2/dt u(t) = r(t), are solved using either modal or direct-integration methods. Initial conditions may be set by continuing the structural state from the end of the previous analysis. Additional notes include:
Step Size – Direct-integration methods are sensitive to time-step size, which should be decreased until results are not affected.
HHT Value – A slightly negative Hilber-Hughes-Taylor alpha value is also advised to damp out higher frequency modes, and to encourage convergence of nonlinear direct-integration solutions.
Nonlinearity – Material and geometric nonlinearity, including P-delta and large-displacement effects, may be simulated during nonlinear direct-integration time-history analysis.
Links – Link objects capture nonlinear behavior during modal (FNA) applications.
See Also
Show if |
---|
|
Related Emails: Related Incidents: |
Related Content
Articles
Child pages (Children Display) |
---|
all | true |
---|
depth | 0 |
---|
allChildren | true |
---|
style | |
---|
sortAndReverse | |
---|
first | 0 |
---|
|
Tutorials
Filter by label (Content by label) |
---|
showLabels | false |
---|
max | 500 |
---|
maxCheckbox | true |
---|
sort | title |
---|
showSpace | false |
---|
reverse | false |
---|
cql | label = "tutorial" and label = "time-history-analysis" |
---|
|
Test Problems
Filter by label (Content by label) |
---|
showLabels | false |
---|
max | 500 |
---|
maxCheckbox | true |
---|
sort | title |
---|
showSpace | false |
---|
reverse | false |
---|
cql | label = "test-problem" and label = "time-history-analysis" |
---|
|