Static And Dynamic Finite Element Analysis On The Composite Materials Embedded With Pseudo-elastic Shape Memory Alloy Fibers

Wind turbine will be affected by the aerodynamic force and centrifugal force in the process of work, and it caused severe vibration. The vibration of blade can reduce production efficiency, shorten its service life, and even be a huge threaten to life and property. So, the problem of blade vibration is one of the major problems about wind turbine system design.New intelligent material shape memory alloy(SMA) is widely used and developed in the aspect of structural vibration control, because of its unique pseudo elastic, shape memory effect, high damping characteristics and so on. To explore the feasibility of a pseudo-elastic properties of SMA used for passive vibration control of the wind energy turbine blades, the composite beam embedded with pseudo-elastic SMA fibers is taken as the object of study. Firstly, the nonlinear static analysis model and the nonlinear balance equation of SMA fiber rod is established, according to the principle of virtual work, the pseudo elastic energy dissipation capacity of SMA composite rod under the static load is simulated by using MATLAB software, lay the foundation for the further analysis of the study about dynamic characteristics of SMA composites.Then, the theoretical model of laminated solid beam embedded with pseudo-elastic SMA fibers is established by using the classical laminated beam theory combined with the finite element method, the equation of motion of SMA laminated beam is established according to the principle of virtual work and considering the SMA phase transition characteristic, the material nonlinearity and the laminated beams are coupled on the basis of mutual. Newmark integration method and Newton iteration method was used to study the dynamic response characteristics of the laminated beam, the super-elastic energy dissipation capacity of SMA with the beam vibration processin is analyzed, and the SMA volume content and the installation position on the effect of dynamic response of laminated beams is discussed. Research shows that pseudo elastic SMA fiber on laminated beam has a certain vibration control effect, and the higher the SMA volume content in the laminated beam, the better vibration control effect is. When SMA fiber mounted on the upper and lower sides of the beam, it can play the biggest role.Finally, the dynamic response of the hollow glass fiber reinforced composite laminated beam embedded with SMA is investigated. And the effect of dynamic response of laminated beams about the temperature, the structure damping and the way of hollow glass fiber laying on is analysed. Researches show that, pseudo elastic SMA fiber is good to the passive vibration control of structure under high temperature. And the structure damping and glass fiber’s laying way also affect SMA fiber’s passive vibration control of structure...