Create/Modify Modal Force
Ribbon menu → Forces tab → Special Forces container → Create/Modify Model Force 
or
(Classic) Build → Forces → Modal Force Tool
Creates or modifies a modal force (MFORCE).
For more information, see:
For the option: | Do the following: |
|---|---|
Force Name | Enter the default MFORCE name to create or modify. When creating a MFORCE, Adams View automatically assigns a default name of MFORCE followed by an underscore and a number to make the name unique (for example, MFORCE_1). |
Flexible Body | Specify the flexible body to which the MFORCE is applied. |
Reaction Part | If desired, in the text box, enter the name of an existing part to which to apply the reaction of the modal force resultant. If you enter a part name, Adams View automatically creates a Floating marker associated with this part when it creates the MFORCE. Adams View keeps the marker coincident with the flexible body analysis coordinate system during the simulation. Therefore, the need for the point of reaction to be a floating marker. In addition, because floating markers cannot be defined on flexible bodies, the reaction part is restricted to rigid bodies only. You can use the Info command to see the floating marker that Adams View creates when you reference a reaction part. |
Define Using | Select how you want to define the modal force: ■Function - Lets you select the modal loadcase and scale function of the MFORCE. Note that you cannot select Function when defining an MFORCE on a flexible body that does not contain any modal load case information in its corresponding MNF. ■Subroutine - Lets you specify up to thirty user-defined constants to be passed to the user-defined subroutine, MFOSUB to directly compute the modal load case and scale function whose product is the modal force applied to the flexible body. The scale function can depend on time or the state of the system. The load case can only be a function of time. ■Force - Lets you specify up to thirty user-defined constants to be passed to the user-defined subroutine, MFOSUB to directly compute the modal force on the flexible body. Each component of the modal force can depend on time or the state of the system. (Adams Solver (C++) only. Learn about switching solvers with Solver Settings - Executable dialog box help.) To use a subroutine, you need to build a version of the Adams Solver that contains your version of the MFOSUB routine that quantifies the modal force. For more information, see the Subroutines section of the Adams Solver online help. You can also specify an alternative library and name for the user subroutine in the Routine text box. Learn about specifying your own routine with ROUTINE Argument. |
If you selected to specify a flexible body with modal load case information, you also specify the following two options: | |
Load Case | Select a modal load case label from a list. The list of modal loadcase labels is generated from the MNF. Learn about Creating Loadcase Files. |
Scale Function | Specify an expression for the scale factor to be applied to the modal load case. |