Advanced Multifunctional Lightweight Aerostructures: Design, Development, and Implementation
9. Vibration Transfer Path Analysis of Aeroengines Using Bond Graph Theory
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Low profit margins faced by the airline operator have forced the sector to seek the development of efficient aeroengines. The demand for more efficient aeroengines has been amplified with worldwide increase in prices of energy commodities. In order to meet this demand, aeroengine manufacturers have focused on developing lightweight aeroengines that use advanced lightweight materials with higher power performance and output. By developing lightweight aeroengines, the structural response and sensitivity to internal excitation loadings attributed to rotor system unbalance forces caused by mass eccentricity is amplified and increased . The rotor system mass eccentricity which leads to unbalance loads is primarily caused by limitations in the manufacturing process of the rotor system . Large unbalance forces originating from the aeroengine makes the system an active contributor of noise and vibration transfer to the aircraft fuselage. The propagation of vibration energy from the aeroengine to the fuselage significantly affects the wellbeing and comfort of the passengers on board. Minimizing the transfer noise and vibration in the aircraft has gained renowned interest by researchers, seeking advanced active and passive methodologies to minimize vibration transfer in the aircraft by implementing various transfer path analysis (TPA) methods [2–11].