OrderCut Analysis

Generates and post-processes engine order related data from an OptiStruct or Nastran frequency response analysis that contains either RPM-based loading subcases or order-based loading subcases.

Background, engine related noise, and vibration problems are typically linked to engine orders that are harmonic multiples of the engine’s fundamental firing frequency. Understanding the order content of the problem signal is a way to identify the physical phenomenon that is causing the problem. To solve the problem, you can adjust the design parameters to modify the engine operation, which in turn reduces the problem orders.