Numerical Simulation on the Mechanical Characteristics of Fan Blades Under Lifting Condition
The hoisting construction of wind turbine blades is an important part of wind engineering,and the blades are prone to local deformation during construction,leading to damage and destruction of the shell.Therefore,it is of great significance to carry out the research on blade stress characteristics during lifting.Using the ABAQUS finite ele-ment numerical method,a three-dimensional finite element model of a fan blade was established to study the stress and deformation characteristics of the blade at different lifting points.The results showed that:(1)the trailing edge of the blade bears greater stress than the leading edge,with a maximum equivalent effective force of 1.36 times that of the leading edge.(2)both compression and tension occur at the trailing edge of the blade within the range of 0-60 m,and the blade at the trailing edge is in a tensile state within the range of 60.0-111.9 m.(3)as the lifting point ratio increases,the maximum stress on the blade decreases first and then increases.When the lifting point ratio is 0.7,the maximum stress on the blade under this working condition is the smallest.
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