Support Stiffness Monitoring of Cylindrical Structures Using Magnetostrictive Transducers and the Torsional Mode T(0,1)
| Autor: | Jabid Quiroga Méndez, Magda Ruiz, Rodolfo Villamizar, Luis Eduardo Mujica |
|---|---|
| Přispěvatelé: | Escola Tècnica Superior d'Enginyers de Camins, Canals i Ports de Barcelona, Universitat Politècnica de Catalunya. Departament de Matemàtiques, Universitat Politècnica de Catalunya. CoDAlab - Control, Modelització, Identificació i Aplicacions |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Test bench
Materials science structural health monitoring (SHM) Acoustics Rigidity (psychology) Enginyeria civil::Materials i estructures [Àrees temàtiques de la UPC] 02 engineering and technology torsional waves 01 natural sciences Biochemistry finite elements modelling (FEM) Analytical Chemistry Contact force 0103 physical sciences medicine Waveguide (acoustics) Coupling (piping) Electrical and Electronic Engineering 010301 acoustics Instrumentation Structural health monitoring guided waves Attenuation Stiffness 021001 nanoscience & nanotechnology Atomic and Molecular Physics and Optics Resistència estructural supports monitoring Ultrasonic sensor medicine.symptom 0210 nano-technology |
| Zdroj: | Sensors; Volume 18; Issue 4; Pages: 1263 UPCommons. Portal del coneixement obert de la UPC Universitat Politècnica de Catalunya (UPC) Recercat. Dipósit de la Recerca de Catalunya instname |
| ISSN: | 1424-8220 |
| DOI: | 10.3390/s18041263 |
| Popis: | In this paper, a support stiffness monitoring scheme based on torsional guided waves for detecting loss of rigidity in a support of cylindrical structures is presented. Poor support performance in cylindrical specimens such as a pipeline setup located in a sloping terrain may produce a risky operation condition in terms of the installation integrity and the possibility of human casualties. The effects of changing the contact forces between support and the waveguide have been investigated by considering variations in the load between them. Fundamental torsional T ( 0 , 1 ) mode is produced and launched by a magnetostrictive collar in a pitch-catch configuration to study the support effect in the wavepacket propagation. Several scenarios are studied by emulating an abnormal condition in the support of a dedicated test bench. Numerical results revealed T ( 0 , 1 ) ultrasonic energy leakage in the form of S H 0 bulk waves when a mechanical coupling between the cylindrical waveguide and support is yielded. Experimental results showed that the rate of ultrasonic energy leakage depends on the magnitude of the reaction forces between pipe and support; so different levels of attenuation of T ( 0 , 1 ) mode will be produced with different mechanical contact conditions. Thus, it is possible to relate a measured attenuation to variations in the supports condition. Results of each scenarios are presented and discussed demonstrating the feasibility and potential of tracking of the amplitude of the T ( 0 , 1 ) as an indicator of abnormal conditions in simple supports. |
| Databáze: | OpenAIRE |
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