Two-Way Radio User Manual

ManualsBrands3D Connexion ManualsTwo-Way RadioKeywords Reference Manual: Volume II Version 6.6

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MOTION

is given with TYPE=VELOCIT Y, the default is a STEP function f or cavity radiation analysis and

a RAMP function for steady-state transport analysis.

TYPE

This param eter is used to specify whether the magnitude is in the form of a displacement or a

velocity.

Set TYPE=DISPLACEMENT (default for cavity radiation analysis) to give translational or

rotational displacement values.

Set TYPE=VELOCITY (only type available for steady-state transport and static analysis)

to give translational or rotational velocities. Veloc ity histories for cavity radiation problems can

be speciﬁed as illustrated in the discussion on prescribing large rotations in “ Cavity radiation,”

Section 32.1.1 of the ABAQUS Analysis User’s Manual.

Data lines to deﬁne translational motion (TRANSLATION):

First line:

1. Node set label or node number.

2. First translational component of motion prescribed (only degrees of freedom 1, 2, or 3 can be

entered). See “Conventions,” Section 1.2.2 of the ABAQUS Analysis User’s Manual, for a

deﬁnition of the numbering of degrees of freedom in ABAQUS.

3. Last translational compone nt of motion prescribed (only degrees of freedom 1, 2, or 3 can be

entered). This ﬁeld can be left blank if motion for only one component is being prescribed.

4. Magnitude of the translational displacement or velocity. This magnitude will be m odiﬁed by

the

AMPLITUDE speciﬁcation if the AMPLITUDE parameter is used.

Repeat this d ata line as often as necessary to deﬁne translational motion for different nodes and degrees

of freedom.

Data lines to deﬁne rotational motion (ROTATION):

First line:

1. Node set label or node number.

2. Magnitude of the rotation (in rad ians) or rotational velocity (in radians/time). This magnitude

will be modiﬁed by the

AMPLITUDE speciﬁcation if the AMPLITUDE parameter is used.

The rotation is about the axis deﬁned from point a to point b, where the coordinates of a and

b are given next. In steady-s tate transport analysis the position and orientation of the rotation

axis are applied at the beginning of the step and remain ﬁxed during th e step.

3. Global x-component of point a on the axis of rotation.

4. Global y-compo nent of point a on the axi s of rotation.

13.21–2

ABAQUS Version 6.1 Module:

ID:

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