Special Topics: Table Types

Description

Straus7 uses tables extensively to provide a consistent manner for managing tabular information used for defining nonlinear behaviour or time histories, or for scaling one quantity as a function of another.

Tables are defined in LAYOUTS: Tables and are subsequently associated with some other data in a Straus7 model based on their intended purpose.

The table below lists all the available tables and summarises their intended purpose. Some tables have multiple purposes.

Table Type	x Axis	y Axis	Purpose
Factor vs Temperature	Temperature	Factor	To scale material property data including modulus, yield, thermal expansion, conductivity, specific heat. To scale certain creep data. To scale attributes including heat source, convection coefficient, radiation coefficient.
Factor vs Time	Time	Factor	To scale material property data including modulus, conductivity. To scale certain creep data. To scale load cases, freedom cases and load path loads in the Quasi-static, Linear Transient Dynamic and Nonlinear Transient Dynamic solvers. To scale attributes including heat source, convection coefficient, radiation coefficient.
Factor vs Frequency/Period	Frequency or Period	Factor Displacement Response Velocity Response Acceleration Response Displacement PSD Velocity PSD Acceleration PSD	To scale load and base excitation in the Harmonic Response and Spectral Response solvers.
Factor vs Position	Position	Factor	To scale applied load in the Quasi-static and Nonlinear Transient Dynamic solvers. To evaluate position dependent values in the equation editor.
Factor vs Velocity	Velocity	Factor	To scale applied load in the Nonlinear Transient Dynamic solver.
Displacement vs Time	Time	Displacement	To define base excitation for the Linear Transient Dynamic and Nonlinear Transient Dynamic solvers. To define the position offset in the Quasi-static and Nonlinear Transient dynamic solvers.
Velocity vs Time	Time	Velocity	To define base excitation for the Linear Transient Dynamic and Nonlinear Transient Dynamic solvers. To define the relative velocity in the Nonlinear Transient Dynamic solvers.
Acceleration vs Time	Time	Acceleration	To define base excitation for the Linear Transient Dynamic and Nonlinear Transient Dynamic solvers.
Strain vs Time	Time	Strain	To define used-defined creep data.
Temperature vs Time	Time	Temperature	To define node temperature time history. To define convection and radiation ambient temperature time history.
Stress vs Strain	Strain	Stress	To define stress-strain relationships for nonlinear materials. To calculate rubber material coefficients from stress-strain relationships.
Force vs Displacement	Displacement	Force	To define nonlinear material behaviour of spring and connection beam elements. To define rubber material coefficients from force-displacement relationships.
Force vs Velocity	Velocity	Force	To define nonlinear material behaviour of damper beam elements.
Moment vs Curvature	Curvature	Moment	To define nonlinear moment-curvature relationships for beam elements.
Moment vs Rotation	Rotation	Moment	To define nonlinear moment-rotation relationships for spring-damper and connection beam elements.