New Event dialog box

Type
Type	Specifies the type of event.For a description of each event type, see Simcenter 3D Response Dynamics.For option description of the Random Base Excitation event type, see Random Base Excitation dialog box.
Name
Name	Name for the event. This name appears on the Simulation Navigator under the Response Dynamics solution process node.
Description	A longer description for the event.
Event Properties
Data Recovery	Available only for Transient and Frequency events.The method for recovering physical response data from the modal response.Mode Acceleration — Uses the normal modes and attachment modes. The attachment modes represent the static correction for truncated high-frequency modes. This method is normally used in Transient events for better response prediction. See Mode acceleration method for more information.Note: When you use Mode Acceleration, set Residual Vectors to None in the following locations, depending on the solution:On the Case Control page in the Solution dialog box of your dynamics solution.In the Solution Step dialog box of the dynamics subcase for a SOL 103 Response Dynamics solution.Mode Displacement — Uses the normal modes only. Does not incorporate static correction using attachment modes. See Mode displacement method for more information. For Frequency events, you will typically choose Mode Displacement.
Spacing	Available only for Frequency, Random, and Response Spectrum events.The abscissa spacing (Even or Uneven) to be used in any excitation functions applied within this event. This selection allows you to limit the types of functions that appear in the list of available functions in the XY Function Manager dialog box when you define an excitation.
Additional Spectral Lines	Available only for Frequency and Random events, and only when Spacing is set to Uneven.If you are applying uneven excitation functions, and you evaluate the random response at a Range of frequencies (rather than at a selected natural frequency), you can enter a number of extra divisions between modes and excitation frequencies for better resolution in the response function. However, entering a higher value consumes more memory. The default value of 10 is adequate for many situations.
Interpolation Method	Available only for Frequency and Random events, and only when Spacing is set to Uneven.Choose a method for the software to approximate data points when generating response functions with the additional spectral lines. Log-LogLinear-LinearLinear-Log****Log-Linear
Duration Option	Available only for Transient and Quasi-Static events.Determines how the duration of the event is defined: Excitation Function — Sets the event duration to be equal to the duration of the excitations that are defined for the event.User Defined — Lets you enter a duration in the Duration Time box.
Duration Time	Available only for Transient and Quasi-Static events, when Duration Option is set to User Defined.The duration of the event in seconds. This value must be greater than or equal to the duration of the excitation function. For example, if the input excitation is (A) and you use the default event duration of 1, the software applies the excitation to that duration as shown in (B).
Fast RMS Evaluation Method	Available only for Random events.A method of quickly computing random RMS results from a Fitted PSD function over a frequency range.Note: When you use Fast RMS Evaluation, you must limit the input modes to only those inside the Fitted PSD function frequencies.
Coefficient Definition Method	Available only for DDAM events.The method for specifying the shock coefficients for the DDAM analysis.By Coefficient File — Lets you define the DDAM shock coefficients in a text file. Input Manually — Lets you enter the shock coefficients manually, when you perform the response evaluation. When you evaluate contour results, the Input DDAM Coefficients dialog box appears, allowing you to enter the shock coefficients. This method is useful if you are working with confidential information.
Coefficient File	Available only for DDAM events when Coefficient Definition Method is set to By Coefficient File.Path and file name of the file containing the shock coefficients for DDAM analysis. For information about the required file format and contents, see DDAM reference acceleration and velocity.
Ship Type	Available only for DDAM events.Specifies whether the excitation will be applied on a surface ship or submarine.
Mounting	Available only for DDAM events.Specifies the location on the ship to which the component you are analyzing is mounted: Hull, Deck, or Shell Plating.
Response Type	The deformation type of the excitation.Elastic — Design criteria applicable to equipment, foundations, or structures for which permanent deformation due to shock is not permitted.Elastic-Plastic — Design criteria applicable to equipment, foundations, or structures for which limited deformation due to shock is permitted.
Formulation	Specifies the method for defining the shock coefficients.Use the User Defined to enter your own custom coefficients for the AA, AB, AC, AD, AF, VA, VB, VC, and VF terms. For steps, see Define custom DDAM shock coefficients.Use the Standard to enter multipliers that the software applies to standard reference values (listed in the following table) that follow the DDS-072-1 specification. For steps, see Define multipliers to adjust the standard DDAM shock coefficients.
Minimum G	Lets you specify a minimum acceleration. For details about how the minimum g is used in the shock spectrum equation, see DDAM reference acceleration and velocity.
Initial Conditions
Available only for Transient events.
Initial Condition	Describes the initial deformation and velocities of the structure in the modal space. You can define the initial deformation as one of the following:Static Deformation — The software calculates deformation using the initial load (from the initial modal force and modal stiffness value) applied at the beginning of the event (time=0). Zero — No deformation (0).User Defined — You enter modal displacements by opening the User Defined Initial Conditions dialog box and entering data in the initial displacement fields. For more information about initial conditions, see Initial conditions in the Response Dynamics theory topics.
User Defined Initial Conditions	Available only if User Defined is selected for the Initial Condition.Opens the User Defined Initial Conditions dialog box.
Settings
Save Geometry with Event Results	Allows you to preserve the Response Dynamics solution process and its event results if you make changes to the FEM. When this option is selected, you can import the RS2 results file in the Post Processing Navigator (without requiring the associated FE geometry in the FEM file). The RS2 file is the same format as a Simcenter Nastran OP2 file and has all of the information to display the model and the event results in one file. If you do not select this option, when you change the FEM, the Response Dynamics solution process becomes obsolete (indicated by an “Out of Date” label in the Simulation Navigator), and the results are no longer usable.

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New Event dialog box, Simcenter 3D 2021.1 Series

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