Vibration and optimum design of rotating laminated blades

✍ Scribed by Ting Nung Shiau; Yung Dann Yu; Chun Pao Kuo

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 816 KB
• Volume: 27
• Category: Article
• ISSN: 1359-8368
• DOI: 10.1016/1359-8368(95)00039-9

✦ Synopsis

The vibration and optimum design of rotating laminated blade subject to constraints on the dynamic behavior are investigated. Restrictions on multiple natural frequencies, as well as maximum dynamic deflections of rotating laminated blades, are considered as constraints of the dynamic behavior of the system. Aerodynamic forces acting on the blade are simulated as harmonic excitations. The optimality criterion method and the modified method of feasible directions have been successfully developed for optimizing the weight of a rotating laminated blade. Effects of radius of the disc, aspect ratio and rotating speed on the system dynamic behaviors and/or the optimum design are also studied. The vibration analysis shows that most of the bending modes can be significantly affected by the rotating speed and the radius of the disc. Results also show that the optimum weight with constraints on the dynamic response is higher than that with frequency constraints. Moreover, results show that the weight of a rotating laminated blade can be greatly reduced at an optimum stage.