# CMBEAM

Bulk Data Entry Defines a beam element for multibody dynamics solution sequence without reference to a property entry.

## Format

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
CMBEAM EID MID GA GB X1, G0 Y1 Z1 L
A I1 I2 J K1 K2

## Example

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
CMBEAM 1 2 123 125 0.0 0.0 1.0 5.0
100.0 833.3 833.3 1485.3

## Definitions

Field Contents SI Unit Example
EID Unique element identification number.

(Integer > 0)

MID Material identification number.

Only MAT1 material definitions may be referenced by this element.

(Integer > 0)

GA, GB Grid point identification number of connection points.

(Integer > 0; GAGB)

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)

G0 Grid point identification number to optionally supply X1, X2, and X3 (Integer > 0). Direction of orientation vector is GA to G0.

(Integer > 0)

L Undeformed length along the X-axis of the beam.

(Real)

A Area of the beam cross-section.

No default (Real > 0.0)

I1 Area moment inertia in plane 1 about the neutral axis.

No default (Real > 0.0)

I2 Area moment inertia in plane 2 about the neutral axis.

No default (Real > 0.0)

J Torsional constant.

(Real > 0.0)

K1, K2 Area factor for shear.

Default = 0.0 (Real)

$\begin{array}{c}|1={/}_{zz}=\int {y}^{2}dA\\ |2={/}_{yy}=\int {Z}^{2}\mathit{dA}\end{array}$