{"id":269,"date":"2020-06-24T11:44:27","date_gmt":"2020-06-24T15:44:27","guid":{"rendered":"https:\/\/web.uri.edu\/nld\/?page_id=269"},"modified":"2026-10-10T20:57:46","modified_gmt":"2026-10-11T00:57:46","slug":"home","status":"publish","type":"page","link":"https:\/\/web.uri.edu\/nld\/","title":{"rendered":"Nonlinear Dynamics Laboratory"},"content":{"rendered":"\n
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<\/span>Nonlinear Dynamics Laboratory<\/p>\n

When amplitude changes the story<\/h2>\n

In nonlinear structures, amplitude changes frequency, mode shape and stability.<\/p>\n

We measure, model, and use these effects: nonlinear normal modes, reduced-order models, vibration absorbers, energy harvesters, and engineered structures.<\/p>\n

Our research<\/a>Publications<\/a>Join the lab<\/a><\/p>\n<\/div>\n\"The\n<\/div>\n\n\n\n

<\/span>Research<\/p>\n\n\n\n

Our research focuses on theoretical, computational, and experimental nonlinear dynamics and vibrations. The central themes are nonlinear modal analysis and experimental characterization of nonlinear normal modes; nonlinear reduced-order modeling and manifold-based reduction; nonlinear system and parameter identification; multivariate signal and time\u2013frequency analysis; and damage diagnosis and prognosis in engineered and natural systems. Current work examines geometry-programmed internal resonance, nonlinear vibration absorption and energy transfer, vibration energy harvesting, and nonlinear mechanical metamaterials. These efforts combine analytical mechanics, nonlinear dynamical-systems theory, numerical continuation, data-driven modeling, and carefully designed experiments to identify mechanisms and physics, construct interpretable reduced-order models, and develop practical methods for prediction, control, and structural-health assessment.<\/p>\n\n\n\n

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<\/span>Explore<\/p>\n\n\n\n

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research<\/div><\/a><\/div><\/div>\n\n\n\n
\"Targeted<\/div>
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people<\/div><\/a><\/div><\/div>\n\n\n\n
\"Frequency<\/div>
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publications<\/div><\/a><\/div><\/div>\n<\/div>\n\n\n\n
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\"Laboratory<\/div>
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news<\/div><\/a><\/div><\/div>\n\n\n\n
\"Laboratory<\/div>
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facilities<\/div><\/a><\/div><\/div>\n\n\n\n
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Teaching and outreach<\/div><\/a><\/div><\/div>\n<\/div>\n\n\n\n

<\/span>Resources<\/p>\n\n\n\n

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Software and data developed by NLD<\/h2>

MATLAB and Python code developed for the analysis of nonlinear time series and measured data.<\/p><\/div><\/div>

Software and data<\/div><\/a><\/div><\/div>\n\n\n\n
\"Shield<\/div>

Software licensing and computer usage policy<\/h2>

All research associates and students working at NLD must follow this policy without exception.<\/p><\/div><\/div>

computing policy<\/div><\/a><\/div><\/div>\n\n\n\n
\"Stroboscopic<\/div>

Monographs and interactive media<\/h2>

Our book draft, monographs, interactive simulations and media for instruction.<\/p><\/div><\/div>

Monographs and media<\/div><\/a><\/div><\/div>\n\n\n\n
\"Paper<\/div>

Writing papers and preparing figures<\/h2>

How we write papers and reports, choose journals, and prepare figures in Python, MATLAB and Mathematica.<\/p><\/div><\/div>

Writing and figure guides<\/div><\/a><\/div><\/div>\n<\/div>\n\n\n