r7.10.02 Post-processing of modal calculations with shock

Summary:

This document presents the principle of post-processing transient calculations by modal recombination with shock nonlinearities available in operator POST_DYNA_MODA_T.

Two post-treatment options can be used, the first usable for vibration-wear problems determines average values and RMS of displacements, shock forces and wear power dissipated at the level of the game supports, the second is applicable for the fine analysis of impacts occurring during transient stresses, the instantaneous maximum force, the instantaneous maximum force, the duration of the shock time, the impulse exchanged, the speed before impact are determined for each shock.

• 1. Introduction
• 2. Quantities considered in vibrations with shocks
  • 2.1. Shock forces
  • 2.2. Shock trips
  • 2.3. Secondary quantities
• 3. Modal transitory post-processing — option “USURE”
  • 3.1. Statistical block processing
  • 3.2. Statistical treatments applied to shock movements
  • 3.3. Statistics for shock forces
  • 3.4. Statistics for shock times
  • 3.5. Wearing power
  • 3.6. Data structure table POST_DYNA associated with option “USURE”
• 4. Modal transitory post-processing — option “IMPACT”
  • 4.1. Common practice for post-treatment of heart stones
  • 4.2. Calculations for post-treatment of impacts
  • 4.3. Data structure table POST_IMPACT associated with option “IMPACT”
• 5. Conclusion
• 6. Bibliography
• 7. Description of document versions