CMBEAM – Beam Element for MBD
Defines a beam element for multi-body dynamics solution sequence without reference to a property entry.
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(1) |
(2) |
(3) |
(4) |
(5) |
(6) |
(7) |
(8) |
(9) |
(10) |
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CMBEAM |
EID |
MID |
GA |
GB |
X1, G0 |
Y1 |
Z1 |
L |
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A |
I1 |
I2 |
J |
K1 |
K2 |
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(1) |
(2) |
(3) |
(4) |
(5) |
(6) |
(7) |
(8) |
(9) |
(10) |
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CMBEAM |
1 |
2 |
123 |
125 |
0.0 |
0.0 |
1.0 |
5.0 |
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100.0 |
833.3 |
833.3 |
1485.3 |
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Field |
Contents |
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EID |
Element identification number. (Integer > 0) |
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MID |
Material identification number. (Integer > 0) |
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GA, GB |
Grid point identification number of connection points. (Integer > 0; GA |
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X1, Y1, Z1 |
Components of vector v at end A, measured at end A, parallel to the components of the displacement coordinate system for GA, to determine (with the vector from end A to end B) the orientation of the element coordinate system for the BEAM element. (Real) |
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G0 |
Grid point identification number to optionally supply X1, X2, X3 (Integer > 0). Direction of orientation vector is GA to G0. (Integer > 0) |
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L |
Undeformed length along the X-axis of the beam. (Real) |
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A |
Area of the beam cross-section. No default (Real > 0.0) |
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I1 |
Area moment inertia in plane 1 about the neutral axis. No default (Real > 0.0) |
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I2 |
Area moment inertia in plane 2 about the neutral axis. No default (Real > 0.0) |
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J |
Torsional constant. (Real > 0.0) |
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K1, K2 |
Area factor for shear. Default = 0.0 (Real) |
Comments
Element identification numbers must be unique with respect to all other element identification numbers.
The X-axis of the beam is always along the line connecting G1 and G2. The Z-axis of the beam is determined based on the X-axis and the Y-axis provided by G3/X1, Y1, Z1.
The moments of inertia are defined as follows:
The beam coordinates must be aligned with the principal axes of the cross section.
The transverse shear stiffness in planes 1 and 2 are (K1)AG and (K2)AG, respectively. If a value of 0.0 is used for K1 and K2, the transverse shear flexibilities are set to 0.0 (K1 and K2 are interpreted as infinite).
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Guidelines for Bulk Data Entries