Ansys Mechanical Component Interface Concept

The Twin Builder-Ansys Mechanical component interface is a static link that lets you add the reduced-order model of a structural system to a Twin Builder schematic. Using model order reduction techniques implemented in Ansys Mechanical, (for more information, see the Ansys Workbench Mechanical APDL documentation) you can create a reduced-order equivalent state-space model for Twin Builder.

• Models support Transient, AC, and DC analysis.
• You can specify an initial condition for a model that initializes the state variables (that is, initial positions). You must specify initial condition values as a vector of double values only.
• Based on the flags specified during the reduction procedure, the generated Twin Builder model (.spm) file may have conservative or non-conservative terminals.

Conservative terminals

Conservative terminals use the force-displacement mechanical domain representation and may be rotational or translational in nature (based on the definition of the Degree of Freedom in Ansys Mechanical). For conservative terminals, the system implemented is of the form:

where,

F is the vector of forces (or torques) at each terminal,

s is the vector of displacements at each terminal,

x is the vector of states.

Also in the conservative implementation, references are present in one of the following three forms:

• no reference
• common reference (only when all terminals have the same nature)
• individual references

Non-conservative terminals

In the non-conservative representation, input and output pins are separate and non-conservative in nature. The system implemented by the model is of the form:

where,

u is the vector of inputs,

y is the vector of outputs.