v2.01.030 SDLD30 - Spectral seismic response of a 2 mass and 3 multi-supported spring system

Summary:

The problem consists in calculating the spectral response of a 2 mass—3 spring system subjected to multiple seismic excitation.

We test the discrete element in traction, the calculation of the natural modes, the static modes and the spectral response by modal superposition via the operator COMB_SISM_MODAL. Different accumulations are tested when calculating the support responses.

The results obtained are in very good agreement with the reference analytical results.

• 1. Reference problem
  • 1.1. Geometry
  • 1.2. Material properties
  • 1.3. Boundary conditions and loads
  • 1.4. Initial conditions
• 2. Benchmark solution
  • 2.1. Calculation method used for the reference solution
  • 2.2. Benchmark results
  • 2.3. Uncertainty about the solution
• 3. Modeling A
  • 3.1. Characteristics of modeling
  • 3.2. Characteristics of the mesh
• 4. Results of modeling A
  • 4.1. Natural frequencies
  • 4.2. Global response on a full modal basis
  • 4.3. Overall response on an incomplete modal basis without static correction
  • 4.4. Overall response on an incomplete modal basis with static correction
  • 4.5. Partition of the primary and secondary components of the response
• 5. Summary of results