Model Correlation Utility (HyperView and HyperGraph 2D)
The Model Correlation utility determines the degree of similarity or correlation between two sets of results.
Modal Assurance Criterion
Modal Assurance Criterion (MAC) is a measure of the correlation between two vibration shapes. Supported vibration shapes include:- Real modes – vibration data at each node is a scalar value.
- Complex modes – vibration data at each node is a complex value.
- Response animation or operational deflection shape - vibration data at each node is a complex value.
The vibration shape results, along with the finite element mesh of the structure, are
assumed to come in one of the following result files:
- H3D – binary result file typically generated using OptiStruct.
- OP2 – binary result file typically generated using OptiStruct or Nastran.
- ODB - binary result file typically generated using Abaqus.
- UNV – ASCII result file typically exported from a testing software.
Typically, the model that has less nodes, such as a test model, is used as the reference model.