Identification of external forces in mechanical systems by using LifeCycle model and stress-stiffening effect
This paper presents an optimization-based inverse procedure for the determination of external loads applied to a given mechanical structure, by using information concerning the dynamic behavior of the system and its corresponding finite element model. The influence of the stress-stiffening effect on...
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| Veröffentlicht in: | Mechanical systems and signal processing 2007-10, Vol.21 (7), p.2900-2917 |
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| container_title | Mechanical systems and signal processing |
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| creator | Flores, Jhojan Enrique Rojas Viana, Felipe Antonio Chegury Rade, Domingos Alves Steffen, Valder |
| description | This paper presents an optimization-based inverse procedure for the determination of external loads applied to a given mechanical structure, by using information concerning the dynamic behavior of the system and its corresponding finite element model. The influence of the stress-stiffening effect on the dynamic characteristics of structural systems is used to establish a relation between the dynamic responses and the applied external forces. An optimization problem is formulated in which the objective function represents the difference between the measured modal characteristics of the loaded structure and their finite element counterparts. The loading parameters (magnitude, position and direction) assumed as being unknown, are considered as design variables. The identification procedure is illustrated by means of numerical simulations and experimental tests, in which a heuristic technique known as LifeCycle model was used. |
| doi_str_mv | 10.1016/j.ymssp.2007.03.003 |
| format | Article |
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| ispartof | Mechanical systems and signal processing, 2007-10, Vol.21 (7), p.2900-2917 |
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| language | eng |
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| source | Elsevier ScienceDirect Journals |
| subjects | Exact sciences and technology Force identification Fundamental areas of phenomenology (including applications) Inverse problems LifeCycle model Measurement and testing methods Physics Solid mechanics Stress-stiffening effect Structural and continuum mechanics Vibration, mechanical wave, dynamic stability (aeroelasticity, vibration control...) |
| title | Identification of external forces in mechanical systems by using LifeCycle model and stress-stiffening effect |
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