A shear beam finite element for the damping analysis oftubular laminated composite beams.pdf

下载文档

0
0
约5.28万字
约 22页
2017-04-13 发布于江苏
举报
版权申诉
保障服务

A shear beam finite element for the damping analysis oftubular laminated composite beams.pdf

1、本文档共22页，可阅读全部内容。
2、有哪些信誉好的足球投注网站（book118）网站文档一经付费（服务费），不意味着购买了该文档的版权，仅供个人/单位学习、研究之用，不得用于商业用途，未经授权，严禁复制、发行、汇编、翻译或者网络传播等，侵权必究。
3、本站所有内容均由合作方或网友上传，本站不对文档的完整性、权威性及其观点立场正确性做任何保证或承诺！文档内容仅供研究参考，付费前请自行鉴别。如您付费，意味着您自己接受本站规则且自行承担风险，本站不退款、不进行额外附加服务；查看《如何避免下载的几个坑》。如果您已付费下载过本站文档，您可以点击这里二次下载。
4、如文档侵犯商业秘密、侵犯著作权、侵犯人身权等，请点击“版权申诉”（推荐），也可以打举报电话：400-050-0827(电话支持时间：9:00-18:30)。

A shear beam finite element for the damping analysis oftubular laminated composite beams

ARTICLE IN PRESSJOURNAL OF SOUND AND VIBRATION0022-460X/$ - s doi:10.1016/j.js Correspond E-mail addrJournal of Sound and Vibration 291 (2006) 802–823 /locate/jsviA shear beam finite element for the damping analysis of tubular laminated composite beams D.A. Saravanos, D. Varelis, T.S. Plagianakos, N. Chrysochoidis Department of Mechanical Engineering Aeronautics, University of Patras, Patras 26500, Greece Received 21 January 2004; received in revised form 9 June 2005; accepted 28 June 2005 Available online 18 January 2006Abstract The paper presents a three-dimensional beam element developed for predicting the damping of composite blades with hollow laminated cross-sections. The unified theoretical framework for synthesizing the equivalent damping properties of a tubular composite blade section is outlined. Building upon the damping mechanics, a damped three-dimensional shear beam finite element is developed, which explicitly provides damping, stiffness and mass matrices. A methodology for analyzing the damped free-vibration response of tubular beams is formulated, and modal frequencies and modal damping values are predicted. Application examples illustrate the ability of the beam element to predict the modal damping and modal frequencies of hollow blades of various uniform circular, elliptical and box sections. The results further quantify the ability of the element to capture the strong effect of skin laminations, as well as the contribution of shear to the modal damping of the beam. r 2005 Elsevier Ltd. All rights reserved.1. Introduction The continuous evolution of wind-turbine and helicopter rotors towards longer and more flexible composite blade configurations and the associated implications on blade aero-elastic performance and fatigue life, are placing new requirements for understanding, analyzing and possibly improving the passive damping which composite materials introduce into a tubular composite blade structure. These requirements call, among other iss