Based on the fatigue life calculation of finite element analysis, it is found through a detailed calculation that under the risk probability of 97.7%, the
# Fatigue performance analysis and reinforcement measures for foundation connection components of wind turbine towers. Therefore, this paper systematically studies the fatigue resistance performance and reinforcement methods of tower foundation connection components through on-site tests and finite element analysis. The test analyzed the lifespan, stress-strain characteristics, crack development and mechanical properties of the connection components under fatigue loads; numerical simulation compared the fatigue life and safety of ordinary components, reinforced with steel mesh, C100 high-strength concrete components, and C40 and C100 composite components, etc., providing key basis for engineering reinforcement. This study simulated long-term fatigue loads to uncover the deformation distribution law and concrete crack propagation mechanism in stud-connected structures, providing crucial data for optimizing the foundation design of steel tube concrete composite structures for wind turbine towers. Subsequently, finite element software was employed to simulate fatigue tests on concrete specimens at the tower-foundation connection, analyzing the influence of horizontal and vertical fatigue loads on the specimen’s mechanical properties.
World leading FEA and CFD Simulation Services Engineering Company for CFD and FEA and Engineering Simulation. # Fatigue Analysis: Stress-Life Method for Wind Turbines. | What you will learn in this article In this blog post, you can discover the origins of engineering fatigue assessment and learn, based on a real simulation problem, how to apply S–N curves to assess high-cycle fatigue. The results of his investigations are still illustrated today by the S-N Curve (also known as the Wöhler Curve), one of the fundamental tools used to assess fatigue in engineering. In this use case, we demonstrate this concept by simulating the fatigue behavior of an aluminum wind turbine blade, illustrating why such a design would not be practical. It describes the relationship between the stress amplitude S and the number of cycles to failure N for a specific material.
# Investigating fatigue life in bolted flange connection in wind turbine towers. This study investigates the fatigue performance of bolted flange connections in wind turbine towers by examining the effects of bolt size and number under variable wind speeds. A simulation framework integrating TurbSim, FAST, and ANSYS Workbench was developed not only to evaluate fatigue behavior, but also to provide a reference methodology for future studies in similar structural applications. Results show that increasing the number of bolts leads to a nonlinear and significant improvement in fatigue life. For example, increasing M48 bolts from 120 to 160 improved fatigue life by over 1000% at a 5 m/s wind speed. An interesting hypothesis derived from the results suggests that increasing one bolt size may produce a fatigue improvement comparable to adding approximately 30 smaller bolts, highlighting a promising direction for future validation and design optimization. ### Fatigue Life Prediction for Flange Connecting Bolts of Wind Turbine Tower.
The predicted bolt fatigue life is about three months when the residual bolt axial force is less than 30 %, which matches the maintenance record.
The calculation results show that the fatigue life of the tower is 31.2 years when the ideal S-N curve is adopted, which is longer than the design life of 25
In this sense, the aim of this work is to develop more accurate and reliable fatigue-life prediction models for composite wind turbine blades. In this project,
Fatigue damage increases with the increase of wind and rotation speed. More than 50% of the damage occurred at the rated rotation speed state,