Modal analysis of a rocket engine(PDF)
《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]
- Issue:
- 2012年04期
- Page:
- 55-59
- Research Field:
- 研究与设计
- Publishing date:
Info
- Title:
- Modal analysis of a rocket engine
- Author(s):
- SHAO Song-lin
- Beijing Aerospace Propulsion Institute, Beijing 100076, China
- Keywords:
- dynamic characteristic; finite element method; nozzle; modal test
- PACS:
- V433.9-34
- DOI:
- -
- Abstract:
- To obtain the dynamic characteristics of a certain rocket engine, a modal analysis for the engine is conducted with finite element method (FEM). According to the idea from components to integrate, the finite element model for each component is established. In addition, the modeling methods for nozzle and thrust chamber are analyzed emphatically. The thrust chamber is simplified to single-layer shell by stiffness equivalent, while the nozzle is simplified to orthotropic shell in accordance with its structural properities. The calculated result of nozzle is compared with that of modal experiment to verify the precison of the modeling method for nozzle presented in this paper. The finite element model of whole engine is assemblied by all the component models, and then its modal distribution is calculated. The result of numerical calculation agrees well with that of modal test.
Last Update: 1900-01-01