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| Research on Thermal Modal Test Method of Rudder Structure |
| Received:May 26, 2021 Revised:July 11, 2021 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2021.08.002 |
| KeyWord:missile rudder the high-temperature resistant exciting rod with water cooling device finite element method ceramic extension rod simulation analysis thermal modal test |
| Author | Institution |
| WANG Yi |
China Aerospace Science & Industry Corporation Defense Technology R & T Center, Beijing , China |
| QIN Qiang |
China Aerospace Science & Industry Corporation Defense Technology R & T Center, Beijing , China |
| ZHAO Peng-fei |
China Aerospace Science & Industry Corporation Defense Technology R & T Center, Beijing , China |
| ZHANG Sheng-peng |
China Aerospace Science & Industry Corporation Defense Technology R & T Center, Beijing , China |
| WANG Gang |
China Aerospace Science & Industry Corporation Defense Technology R & T Center, Beijing , China |
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| Abstract: |
| The purpose of this paper is to explore the influence of high temperature on the modal test results of rudder structure. With the high temperature environment, the missile rudder is studied by the approach of structural modal test. The thermal modal test platform mainly includes the heating system of quartz lamp and the modal testing system. For the excitation part, the high- temperature resistant extended exciting rod is used and equipped with water cooling device. The high-temperature resistant ceramic extension rod is designed to improve the vibration signal collection scheme. The feasibility of the thermal modal test scheme is verified by the comparison finite element analysis and test data. The test results show that the transfer function value of exciting rod is close to 1 when sinusoidal sweep frequency in the range of 20 Hz to 1000 Hz, which is very ideal for the excitation part. However, for testing system, the ceramic extension rod has a little influence on the first four-order modal frequency and the results are within acceptable limits. In the end, we compared the influence of rudder structure stiffness at different temperatures on the same of excitation frequency, the test data show that the stiffness of rudder specimen decreases with the increase of ambient temperature, which leads to the frequency of each order mode decreasing gradually.The modal parameters of rudder structure will be reduced due to high temperature, the research provides the experimental means and technical support for the thermal modal test of the following products. |
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