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Investigation of Separation Mechanism Effects on the Modal Characteristics of a Payload

Khodabandeh, Esmaeil | 2019

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 53077 (45)
  4. University: Sharif University of Technology
  5. Department: Aerospace Engineering
  6. Advisor(s): Mohammad Navazi, Hossein; Parviz, Hadi
  7. Abstract:
  8. This thesis examines the modal characteristics of the payload after connecting to the carrier via the adapter. Basically, the modal characteristics of a payload change after connection to the carrier due to the different stiffness of the coupling mechanism. In this report, it is attempted to split and model the assembly structural system into two substructures interconnected by the V band clamp mechanism. Then, each of the substructures analyze individually and the modal characteristics of the integrated system are extracted using the infrastructure coupling methods. The coupling method is the "Component Mode synthesis" (CMS) method and input data, dynamic and modal characteristics required for each subsystem are extracted by testing. After obtaining the natural frequency and modes of the subsystems from the test, coding in MATLAB software and using related relationships will yield the modal characteristics of the integrated structural system. After extracting the results, it is observed that with good approximation, the natural frequencies and modes of the integrated structural system obtained from the coupling of the substructures, it is almost close to the results of the modal test of the main system integrally and this confirms the accuracy of the applied method
  9. Keywords:
  10. Modal Test ; Missile Propulsion ; Components Mode Synthesis ; Modal Analysis ; Dynamic Characteristics ; Substructuring ; Payload Dynamic Characteristics

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