Events

Before you can perform any response evaluations, you must define one or more events. An event combines the FE model, the modal model, and the excitations, and offers features tailored to specific types of response analysis.

Depending on the type of response analysis you plan to perform, you can define a transient, frequency, random, response spectrum, DDAM, or Quasi-Static event. The type of event and the information available in the FE model and modal model determine the types of results you can evaluate.

Characteristics of event types

Characteristic	Quasi-Static Response	Transient Response	Frequency Response	Random Response	Response Spectrum	DDAM
Initial conditions	N/A	Initial deformation:Static DeformationZero User Defined	N/A	N/A	N/A	N/A
Excitations	Static Load excitations: Distributed attachment modes scaled by Time functions with ordinate type of Unitless Scalar.	Enforced Motion excitations: Time functions of these types:DisplacementVelocity AccelerationNodal Force functions: Time functions of ForceDistributed Load excitations: Loads scaled by Time functionsTransient excitation functions must be evenly spaced. The spacing defines the time steps for the transient solution. To convert uneven functions, use Linear Interpolation, available in the Function Single Math dialog box (Tools→FTK Math Operations→Single Math).	Enforced Motion excitations: Spectrum functions of these types:DisplacementVelocityAcceleration Nodal Force excitations: Spectrum functions of ForceDistributed Load excitations: Loads scaled by Spectrum functions	Enforced Motion excitations: PSD functions of these types:DisplacementVelocity Acceleration Nodal Force excitations: PSD functions of ForceDistributed Load excitations: Loads scaled by PSD functions	Shock Response Spectrum functions of these types: DisplacementVelocity Acceleration	DDAM excitation
Data recovery methods	Superposition	Mode displacement or Mode acceleration	Mode displacement or Mode acceleration	Mode displacement	ABS, SRSS, NRL, CQC, NRC	N/A
Function responses	Nodal transient functions: Displacement, velocity, accelerationReactions Average stresses Average strain Average shell resultants Elemental transient functions:StressesShell resultants Element forces	Nodal transient functions: Displacement, velocity, accelerationReactions Average stresses Average strain Average shell resultants Elemental transient functions:StressesShell resultants Element forces Modal transient functions	Nodal frequency functions: Displacement, velocity, accelerationReactions Average stresses Average strain Average shell resultants Elemental frequency functions:StressesShell resultants Element forces Modal frequency functions	Nodal PSD functions: Displacement, velocity, accelerationReactions Average stresses Average strain Average shell resultants Elemental PSD functions:StressesShell resultants Element forces Modal PSD functions	N/A	N/A
Response results sets	Response at selected time points:DisplacementVelocity Acceleration Stresses Strains Shell resultants Element forces Strain energy	Response at selected time points:DisplacementVelocity Acceleration Stresses Strains Shell resultants Element forces Strain energy	Response at selected frequencies: DisplacementVelocity Acceleration Stresses Strains Shell resultants Element forces Strain energy	N/A	N/A	N/A
Peak value results sets	Peak value results sets	N/A	N/A	N/A	DisplacementsAccelerationsStresses Element forces Von Mises stresses	DisplacementsAccelerationsStresses Element forces Shell resultants
RMS values results sets	N/A	N/A	N/A	DisplacementsAccelerations Stresses Element forces Shell resultants Von Mises stresses	N/A	N/A
Level crossing rate results sets	N/A	N/A	N/A	DisplacementsAccelerations Stresses Element forces Shell resultants Von Mises stresses	N/A	N/A
Strength results sets	Calculated using the maximum effective stresses	Calculated using the maximum effective stresses	Calculated using the maximum amplitude of the Von Mises stresses	Calculated using the RMS values of the Von Mises stresses	Calculated using the peak values of the Von Mises stresses	Calculated using the peak values of the Von Mises stresses

Where do I find it?

Application	Pre/Post
Prerequisite	A Simulation file as the work part and displayed part
Command Finder	Event
Simulation Navigator	Right-click the Response Dynamics solution process node→New Event

How do I

Create an event

Clone an event

Copy an event from one Response Dynamics solution process to another

Set up sequential transient events

DDAM reference acceleration and velocity

Define multipliers to adjust the standard DDAM shock coefficients

Define custom DDAM shock coefficients

Learn more

Data recovery

Required modes for each event type

Excitations in cloned or copied events

Sequential transient events (continuation restart)

Quasi-Static events

Quick links

Command reference

Pre/Post video examples

Bulk Entry Descriptions

Simcenter 3D tutorials

Browse Simcenter 3D help by product area

Events, Simcenter 3D 2021.1 Series

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