doc:user:conditions:rotations
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doc:user:conditions:rotations [2013/07/12 13:26] – created joris | doc:user:conditions:rotations [2022/04/28 17:17] (current) – [Case #3: 2 successive Rotations imposed around 2 axes] boman | ||
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+ | ====== Prescribed Rotations ====== | ||
+ | ===== Loading in cylindrical frame : prescribed rotations - radial displacements (around a moving axis) ===== | ||
+ | |||
+ | Displacements and rotations imposed with respect to an axis are extensions of imposed displacements (translations) and are used to rotate/move a set of nodes around an axis, which can be in motion too. As for displacements, | ||
+ | |||
+ | ===== Translation of the axis ===== | ||
+ | |||
+ | If the axis is defined by points '' | ||
+ | |||
+ | loadingset.define(p1, | ||
+ | loadingset.define(p1, | ||
+ | loadingset.define(p1, | ||
+ | loadingset.define(p2, | ||
+ | loadingset.define(p2, | ||
+ | loadingset.define(p2, | ||
+ | |||
+ | | '' | ||
+ | | '' | ||
+ | | '' | ||
+ | | '' | ||
+ | | '' | ||
+ | | '' | ||
+ | |||
+ | |||
+ | ===== Case #1: Radial displacement imposed with respect to the axis ===== | ||
+ | |||
+ | loadingset.defineRad(gObject, | ||
+ | |||
+ | | '' | ||
+ | | '' | ||
+ | | '' | ||
+ | | '' | ||
+ | | '' | ||
+ | | '' | ||
+ | |||
+ | |||
+ | ===== Case #2: Rotation imposed around the axis ===== | ||
+ | |||
+ | loadingset.defineRot(gObject, | ||
+ | |||
+ | | '' | ||
+ | | '' | ||
+ | | '' | ||
+ | | '' | ||
+ | | '' | ||
+ | | '' | ||
+ | | '' | ||
+ | |||
+ | ===== Case #3: 2 successive Rotations imposed around 2 axes ===== | ||
+ | |||
+ | loadingset.defineRot2(gObject, | ||
+ | axe2, ampl2, fct2, option) | ||
+ | |||
+ | | '' | ||
+ | | '' | ||
+ | | '' | ||
+ | | '' | ||
+ | | '' | ||
+ | | '' | ||
+ | | '' | ||
+ | | '' | ||
+ | | '' | ||
+ | |||
+ | The geometry is transformed in the following way: | ||
+ | * the rotation around the FIRST axis is applied to the object, | ||
+ | * then, the object is translated according to the SECOND axis motion, | ||
+ | * finally, the geometry is rotated around the SECOND axis. | ||
+ | |||
+ | In other words, it means that the second axis of '' |