Date of Award

12-2025

Degree Type

Thesis

Degree Name

M.S.E.

Degree Program

Engineering and Applied Science - Civil & Environmental

Department

Civil and Environmental Engineering

Major Professor

Anika Tabassum Sarkar

Second Advisor

Satish Bastola

Third Advisor

David Eugene Lourie

Abstract

Dynamic Response Control and Vibration Mitigation of Two-Degree-of-Freedom Structures Using Combined Variable Inertia Rotational Mechanism and Tuned Mass Damper System Rotational inertia mechanisms provide innovative methods to develop vibration response for structures subjected to dynamic loads. This study investigates a two-degree-of-freedom (2DOF) structural system with Variable Inertia Rotational Mechanisms (VIRMs) and a Tuned Mass Damper (TMD) as a combined passive control system. The governing nonlinear equations of motion were developed using a mathematical modeling framework and numerically solved for free, harmonic, and broadband excitation. Comparative assessments between Fixed Inertia Rotational Mechanisms (FIRM), VIRM, and combined VIRM–TMD configurations demonstrate that the variable-inertia mechanism adaptively alters the system’s effective inertia and detunes the structure from resonance. The combination arrangement improves vibration reduction and response stability over a wide frequency range. The findings highlight the efficacy of an adaptive passive inertia-based method for vibration reduction in multi-degree-of-freedom structures. Keywords: variable inertia rotational mechanism, tuned mass damper, vibration control, adaptive passive systems, nonlinear dynamics

Rights

The University of New Orleans and its agents retain the non-exclusive license to archive and make accessible this dissertation or thesis in whole or in part in all forms of media, now or hereafter known. The author retains all other ownership rights to the copyright of the thesis or dissertation.

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