Abstract

Engine System Vibration and Stress

A system prediction method for dynamic load, vibration and stress is the prerequisite to address overall aircraft/engine safety and reliability, and to reduce noise.  The advancement in the modelling and analysis of the engine as a system can help to better understanding of the overall structure durability and strength.  The prediction of the engine dynamic behavior must be made available up-front in the design cycle for critical structural evaluations.  The system level engine model must be simple enough for rapid analysis and robust enough for detail component design iteration.  The current state of numerical and computation limitation require us to parse the engine model of modules and analysis into separate disciplines (rotor dynamics, impact, & stress). The challenge is to bring all the information together to predict system level responses. The fidelity of the prediction system is greatly challenged when comparing to the test data.  A system level high fidelity full engine modelling is also needed for the aircraft prediction of loads, vibrations, and noise.  To manage the vast number of information needed for the complex modelling and data produced from the multiple simulations, a smart data management system will need to be implemented.

About the Speaker

Eric Ho, Pratt & Whitney Canada Corp.

Structural Systems

Eric has a Master’s degree in Applied Science from the University of Toronto.  His first engineering job was working for the Ontario Hydro as a junior scientist.  He spent four years in performing piping designs and vibration analysis.  His main responsibility was to model the propagation of fluid dynamic transient waves travelling inside a steam pressurized piping system.  He joined PWC in the early 1990’s and started working there as a senior analyst.  He is now a principle analyst and managing the research activities related to structures and dynamics.   He is also a structures integrator that is responsible for defining the limits and requirements of the full engine dynamic loads and deflections.  He coordinates with customers and suppliers to align with their loads and vibrations requirements.  He is also responsible of the certification of engine structures.  He is heavily involved in the definition of analytical requirements and processes.