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Experimental and Analytical Demonstration of Inertial Amplifier Concepts / EMILY NAR

Swansea University Author: EMILY NAR

Abstract

An inertial amplifier is a dynamic tuning device, which works to increase the effective mass of a resonator without proportionally augmenting the physical mass of the system. This thesis presents six inertial amplifier mechanisms, namely the single-stage, single-stage truss, compound, compound truss...

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Published: Swansea, Wales, UK 2023
Institution: Swansea University
Degree level: Master of Research
Degree name: MSc by Research
Supervisor: Shaw, Alex D. and Adhikari, Sondipon.
URI: https://cronfa.swan.ac.uk/Record/cronfa65369
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first_indexed 2023-12-21T16:34:15Z
last_indexed 2023-12-21T16:34:15Z
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spelling v2 65369 2023-12-21 Experimental and Analytical Demonstration of Inertial Amplifier Concepts bea313068a4cebbbaeb8ea6d870f45f2 EMILY NAR EMILY NAR true false 2023-12-21 An inertial amplifier is a dynamic tuning device, which works to increase the effective mass of a resonator without proportionally augmenting the physical mass of the system. This thesis presents six inertial amplifier mechanisms, namely the single-stage, single-stage truss, compound, compound truss, nested, and nested truss inertial amplifiers. The configuration of each inertial amplifier is conceived through a series of link-bar mechanisms. Based on the configurations of each inertial amplifier, the kinematic relationships and the equations of motion are derived. The analytical analysis demonstrates that through geometrical adjustments, and proof mass alterations to each system, it is possible to manipulate the effective mass of each system, respectively. To support the analytical analysis, an experimental demonstration of each inertial amplifier is provided, whereby a series of electrodynamic shaker tests are conducted. These tests assess the pure mass effects of each inertial amplifier, the behaviour of a cantilever beam, and the impact of the single-stage, single-stage truss, compound and compound truss inertial amplifiers on the dominant single-degree-of-freedom mode of the cantilever beam. Through frequency response plots it is shown that the single-stage, single-stage truss, compound, and compound truss inertial amplifiers, all have the ability to enhance the effective mass characteristics of the cantilever beam, thereby causing changes to its the underlying natural frequency, damping ratio, and Q-factor properties. The inertial amplifiers presented in this paper, provide a step improvement for applications that require dynamic tuning. E-Thesis Swansea, Wales, UK Dynamic Response, Effective Mass, Inertial Amplifier, Natural Frequency, Single-Degree-of-Freedom System, Vibration Control 7 11 2023 2023-11-07 COLLEGE NANME COLLEGE CODE Swansea University Shaw, Alex D. and Adhikari, Sondipon. Master of Research MSc by Research 2023-12-21T16:34:27.3348744 2023-12-21T16:30:55.1187123 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Aerospace Engineering EMILY NAR 1 65369__29315__c1af751064fc4929bded9050e08d0526.pdf 2023_Nar_EG.final.65369.pdf 2023-12-21T16:33:50.0525643 Output 5274775 application/pdf E-Thesis – open access true Copyright: The Author, Emily G. Nar, 2023. true eng
title Experimental and Analytical Demonstration of Inertial Amplifier Concepts
spellingShingle Experimental and Analytical Demonstration of Inertial Amplifier Concepts
EMILY NAR
title_short Experimental and Analytical Demonstration of Inertial Amplifier Concepts
title_full Experimental and Analytical Demonstration of Inertial Amplifier Concepts
title_fullStr Experimental and Analytical Demonstration of Inertial Amplifier Concepts
title_full_unstemmed Experimental and Analytical Demonstration of Inertial Amplifier Concepts
title_sort Experimental and Analytical Demonstration of Inertial Amplifier Concepts
author_id_str_mv bea313068a4cebbbaeb8ea6d870f45f2
author_id_fullname_str_mv bea313068a4cebbbaeb8ea6d870f45f2_***_EMILY NAR
author EMILY NAR
author2 EMILY NAR
format E-Thesis
publishDate 2023
institution Swansea University
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Aerospace Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Aerospace Engineering
document_store_str 1
active_str 0
description An inertial amplifier is a dynamic tuning device, which works to increase the effective mass of a resonator without proportionally augmenting the physical mass of the system. This thesis presents six inertial amplifier mechanisms, namely the single-stage, single-stage truss, compound, compound truss, nested, and nested truss inertial amplifiers. The configuration of each inertial amplifier is conceived through a series of link-bar mechanisms. Based on the configurations of each inertial amplifier, the kinematic relationships and the equations of motion are derived. The analytical analysis demonstrates that through geometrical adjustments, and proof mass alterations to each system, it is possible to manipulate the effective mass of each system, respectively. To support the analytical analysis, an experimental demonstration of each inertial amplifier is provided, whereby a series of electrodynamic shaker tests are conducted. These tests assess the pure mass effects of each inertial amplifier, the behaviour of a cantilever beam, and the impact of the single-stage, single-stage truss, compound and compound truss inertial amplifiers on the dominant single-degree-of-freedom mode of the cantilever beam. Through frequency response plots it is shown that the single-stage, single-stage truss, compound, and compound truss inertial amplifiers, all have the ability to enhance the effective mass characteristics of the cantilever beam, thereby causing changes to its the underlying natural frequency, damping ratio, and Q-factor properties. The inertial amplifiers presented in this paper, provide a step improvement for applications that require dynamic tuning.
published_date 2023-11-07T16:34:27Z
_version_ 1785909967570599936
score 11.01628

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