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| Optimization of Elastic Parameter of Vibration Isolation System for Turboprop Engine |
| Received:December 13, 2018 Revised:May 25, 2019 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/ issn.1672-9242.2019.05.001 |
| KeyWord:engine mount vibration isolation vibration decoupling. |
| Author | Institution |
| CHEN Chun-lan |
Laboratory of Aeronautical Acoustics and Dynamics, Aircraft Strength Research Institute of China, Xi′an , China |
| SU Er-dun |
Laboratory of Aeronautical Acoustics and Dynamics, Aircraft Strength Research Institute of China, Xi′an , China |
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| Abstract: |
| Objective To reduce the vibration coupling existing in a turboprop engine mounting system. Methods A dynamic model of turboprop engine mounting system was built in ADAMS. With the vibration decoupling rate corresponding to the modal frequency, lateral and vertical modes of the engine mounting system as optimization conditions, the dynamic model was optimized by ADAMS/insight. Results The lateral mode frequency and vertical mode frequency of the engine installation system were 8.03 Hz and 28.23 Hz respectively, meeting the isolation requirements. The lateral, pitch and yaw modes all achieved vibration decoupling with decoupling rate higher than 97%. Due to structural characteristics of the main isolator, vertical, heading, roll mode vibration coupling still exists. It might be considered to alter the primary isolator structure to reduce this vibrational coupling. Conclusion The method can improve the vibration decoupling rate of turboprop engine mounting system, reduce the difficulty of rigidity design of the mounting system, and then improve the isolation efficiency of the turboprop engine mounting system. |
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