Damage assessment of the truss system with uncertainty using frequency response function based damage identification method

Jie Zhao; Hans DeSmidt; Wei Yao

doi:10.1117/12.2082593

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1 April 2015 Damage assessment of the truss system with uncertainty using frequency response function based damage identification method

Jie Zhao, Hans DeSmidt, Wei Yao

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Proceedings Volume 9437, Structural Health Monitoring and Inspection of Advanced Materials, Aerospace, and Civil Infrastructure 2015; 94371A (2015) https://doi.org/10.1117/12.2082593
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2015, San Diego, California, United States

Abstract

A novel vibration-based damage identification methodology for the truss system with mass and stiffness uncertainties is proposed and demonstrated. This approach utilizes the damaged-induced changes of frequency response functions (FRF) to assess the severity and location of the structural damage in the system. The damage identification algorithm is developed basing on the least square and Newton-Raphson methods. The dynamical model of system is built using finite element method and Lagrange principle while the crack model is based on fracture mechanics. The method is synthesized via numerical examples for a truss system to demonstrate the effectiveness in detecting both stiffness and mass uncertainty existed in the system.

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Jie Zhao, Hans DeSmidt, and Wei Yao "Damage assessment of the truss system with uncertainty using frequency response function based damage identification method", Proc. SPIE 9437, Structural Health Monitoring and Inspection of Advanced Materials, Aerospace, and Civil Infrastructure 2015, 94371A (1 April 2015); https://doi.org/10.1117/12.2082593

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