Excitation loads

An excitation is an external load, such as a vehicle's tires following a bump's profile where they hit the bump, applied to the model for the purpose of analyzing the model's dynamic response to the load.

Excitations can be:

• Nodal force defined by a node, a direction, and a force function.

• Nodal enforced motion defined by a node, a direction, and a function of displacement, velocity, or acceleration.

• Distributed-load excitation defined by scaling a load that you predefined in the solution (Transient, Frequency, or Random events only).

• Constant velocity impact or drop impact applied to a single node (using an automatically generated haversine function).

• Rotating force defined as either a general rotating force or an unbalanced rotating mass about a given axis (Frequency events only).

You can use the Functions and Graphing Toolkit to create dynamic functions to use as excitations in your events. For general information about creating functions, including detailed steps, see the Functions and Graphing help.

How do I

Convert SRS/PSD/Time functions

Import test data into Response Dynamics

Create nodal and enforced motion excitations

Create distributed load excitations

Create static excitations

Create a drop impact or constant velocity impact simulation

Calculate random RMS functions from PSD input

Using Fast RMS Fitted PSD functions

Create rotating force excitations

Correlate two PSD excitations

Create DDAM excitations

Learn more

Response Dynamics Function Toolkit

Using pulse functions for shock analysis

Velocity Impact excitations

Rotating forces and unbalanced masses

PSD correlation

Look up more details

Function requirements by excitation type

Function parameters by event type

Quick links

Command reference

Pre/Post video examples

Bulk Entry Descriptions

Simcenter 3D tutorials

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Excitation loads, Simcenter 3D 2021.1 Series

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