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Related Experiment Video

Updated: Jun 18, 2026

Simulation of Human-induced Vibrations Based on the Characterized In-field Pedestrian Behavior

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Published on: April 13, 2016

Vibration absorption using non-dissipative complex attachments with impacts and parametric stiffness.

N Roveri¹, A Carcaterra, A Akay

¹Department of Mechanics and Aeronautics, University of Rome,Via Eudossiana, 18, 00184 Rome, Italy.

The Journal of the Acoustical Society of America

|November 10, 2009

Summary

Nonlinear attachments with impacts or parametric effects enhance energy absorption in primary systems. These nonlinearities confine vibratory energy within the attachments, improving performance over linear systems.

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Area of Science:

Mechanical Engineering
Vibrational Dynamics
Nonlinear Systems Analysis

Background:

Vibrational energy can be dissipated from primary structures using undamped resonators attached to them.
Linear systems theory has been applied to large structures like vehicles for energy sharing and absorption.
Previous research focused on linear oscillators for vibration energy harvesting.

Purpose of the Study:

To investigate the impact of nonlinearities in attached resonators on vibrational energy dissipation.
To analyze the effects of impacts and parametric variations in resonators.
To compare the performance of nonlinear resonators against linear ones for energy absorption.

Main Methods:

Numerical simulations were employed to study systems with nonlinear attachments.
Two types of nonlinearities were considered: impacts between resonators and time-varying stiffness (parametric effects).
The energy confinement within the attached oscillators was analyzed.

Main Results:

Both impact and parametric nonlinearities were found to improve energy absorption compared to linear oscillators.
Nonlinear resonators effectively inhibit the return of vibratory energy to the primary structure.
Energy is successfully confined among the attached nonlinear oscillators, demonstrating enhanced dissipation.

Conclusions:

Nonlinear attachments offer superior vibration control by confining energy more effectively than linear systems.
Impacts and parametric effects in resonators are beneficial for energy absorption applications.
The findings suggest advanced strategies for designing vibration damping systems in complex structures.