Session: VIB-08-01 Vibration and Stability of Mechanical Systems and Machine Learning Applications to Vibrations and Dynamics

Paper Number: 74868

Start Time: August 19, 03:20 PM

74868 - Investigation of Vibration Mitigation in High-Aspect-Ratio Wings Using Multi-Directional Clearance Nonlinearities 

 

Airplanes produce a large amount of carbon dioxide emissions on every flight, contributing greatly to the current climate crisis.  The efficiency and environmental impact of airplanes must be improved in order to meet the increased travel demands of the modern day while also reducing significant environmental impact. One way to do this is with the use of high-aspect-ratio (HAR) wings. HAR wings are capable of making fuel-efficient long duration flights. However, while HAR wings are more efficient and sustainable, they also have significant high amplitude, low frequency vibration in both the transverse and longitudinal direction. In this research, a model HAR wing is studied computationally, and a system of nonlinear energy sinks is theorized to greatly reduce the amplitude of broadband frequencies. The computational model is used to predict the response of the HAR wings when receiving impulse excitation without any absorbers present. This is done in order to ensure that the computational model matches the natural frequencies of the HAR wing. In future experimentation, a combination of absorbers will be studied and compared to the baseline model in order to illustrate which sequence of absorbers, shapes, and placements is most effective at limiting the vibrational response of the system. 

Presenting Author: Judith Brown University of Nebraska-Lincoln

Authors:

Judith Brown University of Nebraska-Lincoln
Keegan Moore University of Nebraska-Lincoln