Parametric evaluation of transmission characteristics in aircraft-like structures

✍ Scribed by V.L. Wells; W. Huang

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 703 KB
• Volume: 41
• Category: Article
• ISSN: 0003-682X
• DOI: 10.1016/0003-682x(94)90075-2

✦ Synopsis

A BS TRA C T

The paper develops a model for the coupling between a beam and a ring which represents the joint between a wind and a fuselage ring frame. The model is used to study the transmission qlC structureborne disturbances from the beam to the ring. Such disturbances could arise on an actual aircraft due to a wingmounted propeller and engine. The e~'ects of joint placement and synchrophasing (~s:vnchronizing the phase of the propellers and/or engines) are studied as nwthods of noise control. The results show that the optimum phase sh([? between propeller inputs depends on the location of the joint between the wing and the ring frame. High and mid-wing designs generally experience lower levels qf disturbance transmission than low-wing aircraft, but the combination of wing placement and phase o'nchronization determines the amplitude of structureborne transmission.