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"NASA Technical Reports Server (NTRS) 19820003592: Advanced Superposition Methods For High Speed Turbopump Vibration Analysis" and the language of the book is English.


“NASA Technical Reports Server (NTRS) 19820003592: Advanced Superposition Methods For High Speed Turbopump Vibration Analysis” Metadata:

  • Title: ➤  NASA Technical Reports Server (NTRS) 19820003592: Advanced Superposition Methods For High Speed Turbopump Vibration Analysis
  • Author: ➤  
  • Language: English

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  • Internet Archive ID: NASA_NTRS_Archive_19820003592

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"NASA Technical Reports Server (NTRS) 19820003592: Advanced Superposition Methods For High Speed Turbopump Vibration Analysis" Description:

The Internet Archive:

The small, high pressure Mark 48 liquid hydrogen turbopump was analyzed and dynamically tested to determine the cause of high speed vibration at an operating speed of 92,400 rpm. This approaches the design point operating speed of 95,000 rpm. The initial dynamic analysis in the design stage and subsequent further analysis of the rotor only dynamics failed to predict the vibration characteristics found during testing. An advanced procedure for dynamics analysis was used in this investigation. The procedure involves developing accurate dynamic models of the rotor assembly and casing assembly by finite element analysis. The dynamically instrumented assemblies are independently rap tested to verify the analytical models. The verified models are then combined by modal superposition techniques to develop a completed turbopump model where dynamic characteristics are determined. The results of the dynamic testing and analysis obtained are presented and methods of moving the high speed vibration characteristics to speeds above the operating range are recommended. Recommendations for use of these advanced dynamic analysis procedures during initial design phases are given.

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