Comparison of High-Cycle Fatigue Properties of QT400 and QT450 Ductile Iron for MW Wind Turbine Wheel Hub
The ductile iron wheel of the MW wind turbine is an important stress component connecting its three blades and the main shaft.Because it often works in harsh environment,it needs to withstand the test of high impact force and low temperature environment,and it needs to serve for 15-20 years at an altitude of hundreds of meters without replacement,so it is of great significance to study its fatigue performance.In this paper,the low-temperature impact properties and high-cycle fatigue properties of QT400 and QT450 used for ductile iron blades of wind turbines are systematically studied,and the fatigue phenomenon is studied by combining fracture analysis to find out the main reasons for fatigue failure.Through the simulation of stress distribution in the operation of fan hub,the stress distribution law is obtained,which provides data support for its safe service.
ductile ironwind turbine hubstress distributionlow temperature shockhigh cycle fatigue
万方数据
维普
