The free vibration characteristics of a composite marine propeller blade were studied. MAB and composite materials were used. Composites with symmetric, balanced and unbalanced stacking sequences were analyzed. Rotational effects and added mass were considered using the finite element method. The natural frequency of the blade in water was much lower than in air. The mode shapes of the blade are almost the same in air as in water. The anisotropy of the composites shift the contours of the mode shape. Generally, greater anisotropy corresponds to a lower natural frequency. The rotational effects can be ignored because the marine propeller rotates slowly.
Analysis of underwater free vibrations of a composite propeller blade
Journal of Reinforced Plastics and Composites ; 27 , 5 ; 447-458
2008
12 Seiten, 7 Bilder, 5 Tabellen, 19 Quellen
Aufsatz (Zeitschrift)
Englisch
Aluminiummanganlegierung , Drehungsvermögen , Epoxidharz , Finite-Elemente-Methode , freie Schwingung , geometrischer Parameter , Graphit , Manganbronze , Marinetechnik , numerische Analyse , Propellerflügel , Schichtwerkstoff , Schwingungsamplitude , Schwingungsanalyse , Schwingungsdämpfung , Unterwasseranwendung , Unterwasserprüfung , Winkelgeschwindigkeit
Marine propeller blade vibrations: Full scale tests
Engineering Index Backfile | 1946
|Marine propeller blade vibrations: Full scale tests
Engineering Index Backfile | 1946
|Marine propeller blade vibrations: Full scale tests
Engineering Index Backfile | 1946
|