You can define loads/masses at once for all calculation purposes.
It is not necessary to define separately static loads or masses taken into account in structure analyses (static and dynamic, respectively). On the basis of the pre-defined static loads you can create masses to be used during dynamic calculations.
To convert static loads to masses, follow the instructions below.
- Click Analysis Analysis Types. The Analysis Types dialog opens.
- Go to the Load to Mass Conversion tab
- Click ... to open the Selection dialog, and then select the cases that you want to convert.
- Select the direction of the mass.
- In the Conversion direction list, select the directions along which the masses will operate.
- Enter the multiplication coefficient that should be applied to the value of the static load.
- Specify the analysis case that will use the resulting masses from the Add mass to list.
- Click Add. The selected load cases are added to the added masses table.
Concentrated forces are automatically converted to concentrated masses, distributed loads to distributed masses, and moments to rotational masses.
- Click Loads Mass table. The Added Masses table opens.
- Go to the Conversion of loads tab. Mass values are presented in the table as weight values (acceleration of gravity is applied). Masses created due to the conversion process are marked CNV in the Memo column to differentiate them from user defined masses. The mark denotes the origin of a mass for the benefit of the conversion procedure.
Note: Conversion of loads to masses is always carried out at the beginning of calculations. It begins with the removal of the masses generated during the previous conversion. The change of the contents of the MEMO column in the table of masses may result in a mass not being removed during conversion, which leads to duplication of masses.
You can also delete or modify a load case as necessary.
Note: For shell structures a hydrostatic pressure load cannot be converted to masses.
See also:
Detailed description of load to mass conversion (assumptions, syntax, etc.)