Nodal beam stack vibration isolators

George Rai; Christopher Rahn; Edward Smith; Conor Marr

doi:10.1016/j.ymssp.2022.109324

Nodal beam stack vibration isolators

George Rai, Christopher Rahn, Edward Smith, Conor Marr

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

This paper introduces additively manufactured beam networks that isolate vibration with multiple broad bandgaps. The isolators consist of symmetric stacks of beams with tip masses connected in series via compliant hinges near nodal points. An analytical model is derived to predict the vibration behavior of a beam stack. An isolator with four beams is designed to provide a band gap of 32 Hz with a center frequency at 72 Hz. A Polylactic acid polymer prototype is 3D printed and the frequency response of input force to transmitted force is experimentally measured showing a large 41 Hz band gap with a center frequency also around 72 Hz. The experimentally validated model is used to design a 10 beam isolator with a low frequency band gap from 10 to 86 Hz, and a high frequency band gap from 202 to 543 Hz.

Original language	English (US)
Article number	109324
Journal	Mechanical Systems and Signal Processing
Volume	179
DOIs	https://doi.org/10.1016/j.ymssp.2022.109324
State	Published - Nov 1 2022

All Science Journal Classification (ASJC) codes

Control and Systems Engineering
Signal Processing
Civil and Structural Engineering
Aerospace Engineering
Mechanical Engineering
Computer Science Applications

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10.1016/j.ymssp.2022.109324

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title = "Nodal beam stack vibration isolators",

abstract = "This paper introduces additively manufactured beam networks that isolate vibration with multiple broad bandgaps. The isolators consist of symmetric stacks of beams with tip masses connected in series via compliant hinges near nodal points. An analytical model is derived to predict the vibration behavior of a beam stack. An isolator with four beams is designed to provide a band gap of 32 Hz with a center frequency at 72 Hz. A Polylactic acid polymer prototype is 3D printed and the frequency response of input force to transmitted force is experimentally measured showing a large 41 Hz band gap with a center frequency also around 72 Hz. The experimentally validated model is used to design a 10 beam isolator with a low frequency band gap from 10 to 86 Hz, and a high frequency band gap from 202 to 543 Hz.",

author = "George Rai and Christopher Rahn and Edward Smith and Conor Marr",

note = "Publisher Copyright: {\textcopyright} 2022 Elsevier Ltd",

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doi = "10.1016/j.ymssp.2022.109324",

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AU - Rai, George

AU - Rahn, Christopher

AU - Smith, Edward

AU - Marr, Conor

PY - 2022/11/1

Y1 - 2022/11/1

N2 - This paper introduces additively manufactured beam networks that isolate vibration with multiple broad bandgaps. The isolators consist of symmetric stacks of beams with tip masses connected in series via compliant hinges near nodal points. An analytical model is derived to predict the vibration behavior of a beam stack. An isolator with four beams is designed to provide a band gap of 32 Hz with a center frequency at 72 Hz. A Polylactic acid polymer prototype is 3D printed and the frequency response of input force to transmitted force is experimentally measured showing a large 41 Hz band gap with a center frequency also around 72 Hz. The experimentally validated model is used to design a 10 beam isolator with a low frequency band gap from 10 to 86 Hz, and a high frequency band gap from 202 to 543 Hz.

AB - This paper introduces additively manufactured beam networks that isolate vibration with multiple broad bandgaps. The isolators consist of symmetric stacks of beams with tip masses connected in series via compliant hinges near nodal points. An analytical model is derived to predict the vibration behavior of a beam stack. An isolator with four beams is designed to provide a band gap of 32 Hz with a center frequency at 72 Hz. A Polylactic acid polymer prototype is 3D printed and the frequency response of input force to transmitted force is experimentally measured showing a large 41 Hz band gap with a center frequency also around 72 Hz. The experimentally validated model is used to design a 10 beam isolator with a low frequency band gap from 10 to 86 Hz, and a high frequency band gap from 202 to 543 Hz.

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VL - 179

JO - Mechanical Systems and Signal Processing

JF - Mechanical Systems and Signal Processing

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ER -

Nodal beam stack vibration isolators

Abstract

All Science Journal Classification (ASJC) codes

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