v2.02.133 SDLL133 - Calculation of prestressed natural modes of a bladed wheel

Summary:

The objective of this test case is to calculate the prestressed natural modes of a bladed wheel. Prestress is obtained by applying rotation to the wheel and locking one of the blades.

Two models are carried out:

• Modeling A: we model the entire wheel with 3D elements,

• B modeling: we model with 3D elements only a fin on which cyclic symmetry conditions are applied.

For each of the two models, a first nonlinear static calculation is performed to find the constraints, then a modal analysis is carried out to obtain the prestressed eigenmodes.

• 1. Reference problem
  • 1.1. Geometry
  • 1.2. Elastic properties of the material
  • 1.3. Boundary conditions and loads
• 2. Benchmark solution
  • 2.1. Reference quantity and result
  • 2.2. Reference quantity
  • 2.3. Reference quantity and result
• 3. Modeling A
  • 3.1. Characteristics of modeling A
  • 3.2. Tested sizes and results
• 4. B modeling
  • 4.1. Characteristics of B modeling
  • 4.2. Tested sizes and results
• 5. Summary of results