AREA=r

Respecifies the uniform area of the beam cross-section. The centroidal axis must be orthogonal to this cross-section.

ASY=r

Respecifies the correction factor for shear deflection in the y direction for Timoshenko beams.

ASZ=r

Respecifies the correction factor for shear deflection in the z direction for Timoshenko beams.

CMATRIX=r1,...,r21

Respecifies the six-by-six damping matrix for the beam. Because this matrix is symmetric, you need to specify only one-half of it, that is, twenty-one entries. The units for the translational and rotational components of CMATRIX should be force-time per displacement unit and torque-time per radian, respectively.

CRATIO=r

Respecifies the ratio for calculating the structural damping matrix for the beam. Adams Solver (C++) multiplies the stiffness matrix by the value of CRATIO to obtain the damping matrix.

EMODULUS=r

Respecifies Young’s modulus of elasticity for the beam material.

GMODULUS=r

Respecifies the shear modulus of elasticity for the beam material.

IXX=r

Denotes the torsional constant. This is sometimes referred to as the torsional shape factor or torsional stiffness coefficient. It is expressed as unit length to the fourth power.

For a solid circular section, Ixx is identical to the polar moment of inertia where r is the radius of the cross-section.

For thin-walled sections, open sections, and noncircular sections, you should consult a handbook.

IYY=r,IZZ=r

Denotes the area moments of inertia about the neutral axes of the beam cross sectional area (y-y and z-z). These are sometimes referred to as the second moment of area about a given axis. They are expressed as unit length to the fourth power.

For a solid circular section, Iyy=Izz= where r is the radius of the cross-section.

For a thin-walled sections, open sections, and noncircular sections, the user should consult a handbook.

LENGTH

Respecifies the undeformed length of the beam along the x-axis of the J marker.

LIST

Lists the current values of the data in the BEAM statement.