Analysis of the effect of fluid-solid interactions on vibration with finite elements

It is very important today that the fluid-solid interaction calculations can be done as accurately as possible. Considering the cost and difficulty of experimental studies, numerical studies provide convenience and time savings in terms of both different designs and loading conditions With the widespread use of technology, simulations and analyzes have started to be done in more detail, more accurately and faster with computers. Under some assumptions, only fluid or only solid modeled systems are analyzed, but full-scale fluid-solid interaction simulations are required for accurate modeling. In this study, the movement and deformation of wind turbine blades were investigated depending on wind speed and air flow. The effects of fluid motion on the dynamic behavior of the turbine blades were modeled with the Ansys package program. Fluid movement was performed with the CFX module, stresses were calculated with the Static Structural module for constant wind speed, and stress and deformations were obtained with the Transient Structural for time-dependent variations of the wind speed. The effect of wind speed on vibration is calculated by taking the FFT of the special pressure distribution result defined in CFX and entering the FFT data in the CFX into the CFD Pressure Mapping boundary condition in the Harmonic Response module. The natural frequencies of the blade were calculated with the modal modulus and the state of stress and deformations was examined when the frequency of variation of the variable wind speed was close to the natural frequencies.