v2.02.104 SDLL104 - Primary and secondary structures subject to random excitation

Summary:

A main beam of high rigidity and significant mass (primary structure), embedded at its base, supports a light and flexible beam (secondary structure) at three points of transmission of forces.

The primary structure is excited at its base by an acceleration given by its DSP.

The test compares a direct calculation of all the two structures and a chained calculation where the response of the main beam at the connection points is used as the excitation of the secondary beam.

The following functionalities are tested:

• interspectral analytical matrix predefined by the function of KANAI - TAJIMI,

• random dynamic response in absolute motion, under imposed acceleration,

• modal interspectral response,

• modal interspectral excitation.

This approach is representative of what is required for industrial studies: to determine the responses of different secondary structures knowing the response of the primary structure.

• 1. Reference problem
  • 1.1. Geometry
  • 1.2. Material properties
  • 1.3. Boundary conditions and loads
• 2. Benchmark solution
  • 2.1. Calculation method used for the reference solution
  • 2.2. Benchmark results
  • 2.3. Bibliographical references
• 3. Modeling A
  • 3.1. Characteristics of modeling
  • 3.2. Characteristics of the mesh
  • 3.3. Tested sizes and results
• 4. Summary of results