Vibrational Predictions by Substructure Synthesis Eliminating the Effect of Joint Stiffness and Rotational Degree of Freedom
| Autor: | Akinori Utsunomiya, Shouhei Kumano, Hayashi Tetsuo, Morita Shigeru |
|---|---|
| Rok vydání: | 1991 |
| Předmět: |
Engineering
business.industry Mechanical Engineering Modal analysis Stiffness Structural engineering Residual Industrial and Manufacturing Engineering Finite element method Computer Science::Robotics Vibration Modal Mechanics of Materials Joint stiffness medicine Substructure medicine.symptom business |
| Zdroj: | TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C. 57:3526-3531 |
| ISSN: | 1884-8354 0387-5024 |
| DOI: | 10.1299/kikaic.57.3526 |
| Popis: | The extracting and building-block approach, or E-BBA, using mode synthesis was developed to predict the modified vibration characteristics of a global structure when substructures are modified. This prediction is performed by adding the difference in mass and stiffness of the modified substructures obtained by FEM to the global structure modal parameters obtained experimentally before modification. Also, in order to obtain the compatibility of DOF from the test (usually 3 DOF) and the EFM, 6 DOF of FEM is reduced to 3 DOF by Guyan reduction. Since this method reduces the effects by joint stiffness and residual term, and eliminates the measurement of the rotational DOF, the prediction is more precise than that by the conventional method. Additionally, this minimizes the manpower required for the test and analysis. |
| Databáze: | OpenAIRE |
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