热颤振地面模拟试验技术

doi:10.7527/S1000-6893.2022.27295

Abstract

Abstract:

Ground flutter simulation test is a flutter verification experiment technology for real aircraft structures， which uses exciters to simulate unsteady aerodynamic force. In this paper， the thermal environment simulation scheme is used in this technology to establish the thermal flutter ground simulation system. An aerodynamic interpolation point optimization algorithm is proposed based on the weighting of modal shapes. An unsteady aerodynamic reduced-order model for time-varying structure is constructed by using the Kriging surrogate model. After the simulation scheme of aerodynamic thermal environment and the measurement method of high-temperature structure’s response signal are designed， the experiment system based on the titanium alloy wing model is completed. Finally， time-varying thermal flutter boundary tracking and testing is carried out. The testing results show that the testing accuracy is acceptable when the controller is within the preset frequency range， but the narrow control bandwidth of robust controller limits the application of the thermal flutter ground simulation test.

Key words: hypersonic vehicle, aerodynamic heating effect, aerothermoelastic, time-varying flutter boundary, ground flutter test

CLC Number:

V215.3

Haoyu CHEN, Binwen WANG, Qiaozhi SONG, Xiaodong LI. Thermal flutter ground simulation test[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2023, 44(8): 227295-227295.

Figures/Tables 20

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References 24

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温度/℃	弹性模量/GPa	温度/℃	热膨胀系数/（10^-6℃^-1）
20	118	20~200	8.9
350	93	20~300	9.0
500	80	20~400	9.2
550	73	20~500	9.3

时间/s	工况序号	速度/（m·s^-1）		误差/%
时间/s	工况序号	试验	数值计算	误差/%
10	2	2 847	2 637	8.0
20	3	2 586	2 423	6.7
30	4	2 350	2 205	6.6
40	5	2 173	1 968	10.4
50	6	2 031	1 845	10.1
60	7	1 923	1 773	8.5
70	8	1 853	1 709	8.4
80	9	1 690	1 515	11.6
90	10	1 496	1 383	8.2
100	11	1 422	1 262	12.7
110	12	1 423	1 221	16.5

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Thermal flutter ground simulation test

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