2018
DOI: 10.1155/2018/9742591
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Novel Nonstationarity Assessment Method for Hypersonic Flutter Flight Tests

Abstract: Hypersonic aircraft have been rapidly developed in recent years both theoretically and experimentally. Aerothermoelastic simulation is very challenging due to its inherent complexity, but physical tests are a workable approach. Flutter tests with variable speed are a popular alternative to hypersonic tests which provide nonstationary structural response data. This paper proposes a nonstationarity assessment method based on energy distribution in the time-frequency domain. The proposed method reveals the nonsta… Show more

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