Jet engines generate significant amounts of noise and vibrations during normal operation. This noise can be potentially harmful to the efficiency of the aircraft, the health of passengers and crew, and the environment. To limit noise produced by a jet engine, aerospace engineers must design mechanisms to attenuate the vibration being transmitted from the engine to the body of the aircraft. One way to do this is through the utilization of lattice structures in the housing of the engine. Lattice structures have natural properties that make them capable of absorbing a wide range of vibrational frequencies. They can be designed with computer-aided design (CAD) software, modified to produce relevant bandgaps, and produced using additive manufacturing methods. The nature of lattice structures makes them a particularly promising area of study for aircraft noise reduction. This paper explores the use of lattice structures for vibration reduction. Lattice structure designs for vibrational attenuation in jet engines were tested experimentally and with simulation and are presented in this paper. Substitution of individual cells with ferromagnetic materials was also explored, with the testing also incorporating magnetic fields, changing the response characteristics of the lattice.

• This report represents the work of one or more WPI undergraduate students submitted to the faculty as evidence of completion of a degree requirement. WPI routinely publishes these reports on its website without editorial or peer review.

Creator

• Hodge, Alex
• Ramsbottom, Bethany
• Franklin, Jake
• Kerwin, John

Subject

• Innovation
• Well-Being
• Sustainability
• Industry

Publisher

• Worcester Polytechnic Institute

Identifier

• E-project-031722-155512
• 51836

Advisor

• Karanjgaokar, Nikhil

Year

• 2022

UN Sustainable Development Goals

• 9 - Industry, Innovation and Infrastructure

Date created

• 2022-03-17

Resource type

• Major Qualifying Project

Major

• Aerospace Engineering

Rights statement

• In Copyright