Static acceleration load

Use the Acceleration command to define a static acceleration load on your model. When you define an acceleration load, you must specify the magnitude of the load as well as the direction in which the load acts.

For Simcenter Nastran or MSC Nastran, the options in the Acceleration dialog box correspond to the fields in the ACCEL and ACCEL1 bulk data entries. For more information, see ACCEL or ACCEL1 in the Simcenter Nastran Quick Reference Guide.

For Samcef, the Acceleration dialog box corresponds to the CLM ACC command.

You can define the magnitude of an acceleration load as a constant value, an expression, or a field that defines how force load varies with time, frequency or temperature.

Acceleration loads for LS-DYNA solutions

Use the Acceleration command to define translational base accelerations to apply a body force on a structure. For example, you can use the Acceleration command to apply a gravitational load to a structure. The options in the Acceleration dialog box correspond to the variables for the LS-DYNA *LOAD_BODY_VECTOR keyword.

You can use the Load curve options in the Static Acceleration dialog box to vary the value of the rotation over time. You can also use specify options to define stress initialization by dynamic relaxation. Use the new DEFINE_CURVE modeling object to include dynamic relaxation and define the properties for the load curve, such as the scaling factors for the abscissa and ordinate values. For example, you can choose to ramp the rotation load during the dynamic relaxation phase of the analysis and then hold the load constant until the solution converges.

Where do I find it?

Application	Pre/Post
Prerequisite	A Simulation file as the work part and displayed part Simcenter Nastran, MSC Nastran, LS-DYNA, or Simcenter Samcef as the specified solver
Simulation Navigator	In the appropriate solution or subcase, right-click Load Container→New Load→Acceleration

Learn more

Enforced axial deformations for 1D elements (Nastran)

Distributed Force load

Enforced motion load

Enforced motion loads from external files

Fluid Penetration Pressure

Force or moment loads from an external file

Nodal pressure loads (Nastran and ANSYS)

Non-Structural Mass (Nastran)

Quick links

Command reference

Pre/Post video examples

Bulk Entry Descriptions

Simcenter 3D tutorials

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Static acceleration load, Simcenter 3D 2021.1 Series

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