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Section 1
1-3
Specification of the correct structure type reduces the number
of equations to be solved during the analysis. This results in a
faster and more economic solution for the user. The degrees of
freedom associated with frame elements of different types of
structures is illustrated in Figure 1.1.
Structure Types
Figure 1.1
1.4 Unit Systems
The user is allowed to input data and request output in almost all
commonly used engineering unit systems including MKS, SI and
FPS. In the input file, the user may change units as many times as
required. Mix and match between length and force units from
different unit systems is also allowed. The input-unit for angles (or
rotations) is degrees. However, in JOINT DISPLACEMENT
output, the rotations are provided in radians. For all output, the
units are clearly specified by the program.
F
or input,
see section
5.3