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3.9 Initial Section
The Initial section defines all initial conditions that may be applied to the analysis. An initial condition is defined via the init element and requires the bc attribute and node_set attribute. The bc attribute defines the degree of freedom to which the initial condition is applied. The node_set attribute defines the set of nodes that this initial condition affects. The value of the initial condition is then defined with the value element.
<init bc="vx" node_set="set1"> <value>1.0</value> </init>