Design Constraint - Global dialog box

Modeling Object
Name	Sets a unique name for the design constraint.
Label	Sets a unique integer for the modeling object.The dialog box automatically displays the next available modeling object number. However, you might want to change this if you use a particular series of numbers to identify certain types of modeling objects.
Properties
Description	Sets a description for the design constraint.You can also click Description to open the Description dialog box. This lets you see more of the text that you type, as well as cut, copy, or paste text.This description appears only on this dialog box.
Response Definition	Definition MethodSpecifies whether to display the Direction list when Response Type is set to Total Model Weight (WEIGHT):Standard—Does not display the Direction list. Any weight response is assumed to be in the Z-direction, indicating that there is no directional mass.Advanced—Displays the Direction list so that you can specify the direction of the mass.Response LabelSets a unique design response identifier.This label must begin with an alphabetic character and cannot exceed eight characters.Tip: To make it easier to identify this design constraint in the optimization spreadsheet, use a descriptive label.Response TypeSpecifies the response that you want to constrain.This list displays only responses that are appropriate for a solution.For more information about these response types, see DRESP1.DirectionAppears when Definition Method is set to Advanced and Response Type is set to Total Model Weight (WEIGHT).Select Mx, My, or Mz to specify the direction of the mass using a specific axis of the absolute coordinate system, or select Ix, Iy, or Iz to specify the direction of inertia. Select Row/Column Entry to use the Nastran grid point weight generator.Row Number/Column NumberAppear when Direction is set to Row/Column Entry.Set the row and column number to use in the Nastran rigid body mass or weight matrix. Based on the value in this matrix, the Nastran grid point weight generator computes the mass properties, centers of gravity, and inertias of the structure.The default values for Row Number and Column Number are 3, which specifies Wz (mass or weight in the Z-direction of the absolute coordinate system). This default value is appropriate for models that have no directional mass. If no directional mass is defined (for example, if no CONM1, CMASS, or DMI bulk entries exist), the Wx, Wy, and Wz values each equal the mass or weight of the structure.By default, the mass properties calculation is performed relative to the origin of the absolute coordinate system, which is the same as the Nastran basic coordinate system. However, if you define the GRDPNT parameter, the calculation is performed relative to the reference node you specify.To define the GRDPNT parameter, in the Case Control page in the Solution dialog box, click Create Modeling Object next to Parameters (PARAM), and then click G-H in the list. If you type a different value in the GRDPNT box, the parameter is added to the solution. To add the parameter and retain the default value, click Add .For more information, see DRESP1, Overview of the Grid Point Weight Generator, and Weight Center of Gravity and Moment of Inertia Check.
Limits	LowerSets the lowest acceptable value for the selected response.The available units of measure depend on the selected response. For example, for Total Model Weight (WEIGHT), you might specify the value in kilograms or pounds (mass). If necessary, the exporter converts the unit of measure to the one required by Nastran.UpperSets the highest acceptable value for the selected response.Note: If you do not want to specify a lower or upper limit, leave the corresponding box blank. If you type 0, the solver interprets that as the constraint value.These limits do not apply to SOL 200 Design Sensitivity Analysis.
Card Name	Displays the names of the Nastran bulk entries that will be generated when you solve the solution: DCONSTR and DRESP1.

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Design Constraint - Global dialog box, Simcenter 3D 2021.1 Series

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