考虑离心刚化效应的旋转风力机叶片动力特性分析-地震工程与工程振动.pdfVIP

29 1 Vo.l 29 No. 1 2009 2 JOURNAL OF EARTHQUAKE ENGINEER ING AND ENG INEERING V IBRATION Feb. 2009 : 1000- 1301( 2009) 01- 0117- 0 1 1 1, 2 陈小波, 李 静 , 陈健云 ( 1 , 11 024; 2, 11 024) : , , , , , , , , , : ; ; ; ; : TU311. 3 : A Analysis of dynam ic cha racteristics of rotating w ind turb in e blade w ith cen trifugal stiffen ing effect 1 1 1, 2 CHEN X iaobo, LI Jing , CHEN Jianyun ( 1. Schoo l ofC ivil andHydraulic Engineering, Dalian University ofT echnology, Dalian 11 024, China; 2. State Key Laboratory of Coastal and O ffshore Engineering; Dalian University ofT echnology, Dalian 11 024, China) Abs tract: The dynam ic characteristics ofw ind turbine are d irectly affected by the dynam ic characteristics of blade, so it is necessary to study the dynam ic characteristics of rotating blade. The rotationalbladew ith the effects of gravity force and cen- trifugal forcew ill cause centrifugal effect, andw ill change the blades dynam ic characters. Based on the concept of spacial plane and finite elementmethod, th is paper calculates the axial force plane of blade nodes and the first three orders of natu- ral frequency plane w ith two variable parameters of tmi e and rotational speeds, and the stiffening coefficient is also used to describe the stiffening degree of the blade, and then presents the correction formula of frequency. The result shows that the method used in this paper can smi ulate the dynam ic characters of rotational bladew ith centrifugal stiffening effec,t and re- flect the practical dynam