Simulation analysis of temperature field and temperature stress for wind turbine extended foundation

Abstract

To explore the change rule of the temperature field and stress field for wind turbine extended foundation, this paper is based on the actual construction conditions of a wind farm in eastern China, and considers the creep of concrete. Based on the UPFs of ANSYS, the temperature field and temperature stress of the wind turbine extended foundation are simulated and calculated in the whole process. The calculation results show that the maximum temperature and maximum stress occur in the center of the wind turbine foundation; after the temperature of each part of the foundation drops to quasi-stable, the temperature field and the temperature stress field will change periodically with the air temperature; although the surface stress has a small value, the maximum surface stress occurs in the early stage when the concrete is not fully developed, and there is still a possibility of cracks on the surface of the foundation. Through analysis, it is found that the internal and external temperature difference of the surface part is the reason for the surface stress; the temperature drop of the central part determines the maximum temperature stress of the foundation. Therefore, the temperature control of the wind turbine foundation can be performed by controlling the internal and external temperature difference and the temperature drop, which provides a reference for the temperature control and cracks prevention of the wind turbine foundation.