Stochastic P-bifurcation of a 3-DOF airfoil with structural nonlinearity

• Autorzy: Hao Ying , Du Xuewen , Hu Yuda , Wu Zhiqiang

Identyfikatory

DOI

10.15632/jtam-pl/134281

• Języki publikacji: EN

Abstrakty

EN

In this paper, the stochastic-aeroelastic nonlinear response of a three-degree-of-freedom (3-DOF) structural nonlinear airfoil with a control flap is presented. The critical parameter conditions of stochastic P-bifurcation are solved by using the improved average method, the stochastic average method combined with the singularity theory. The results show that the periodic solution produced by Hopf bifurcation has involved a second bifurcation, the nonlinear critical speed of saddle node bifurcation points is advanced, and the airfoil appears bi-stable. The stochastic singularity analysis shows that the increasing stochastic disturbance intensity will cause a greater probability for a large amplitude stochastic flutter.

Słowa kluczowe

EN

stochastic P-bifurcation; structural nonlinearity; stochastic parametric excitation

• Wydawca: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
• Czasopismo: Journal of Theoretical and Applied Mechanics
• Rocznik: 2021
• Tom: Vol. 59 nr 2
• Strony: 307--317
• Opis fizyczny: Bibliogr. 20 poz., rys.

Twórcy

autor

Hao Ying

• College of Civil Engineering and Mechanics, Yanshan University, Qinhuangdao, China

autor

Du Xuewen

• College of Civil Engineering and Mechanics, Yanshan University, Qinhuangdao, China

autor

Hu Yuda

• College of Civil Engineering and Mechanics, Yanshan University, Qinhuangdao, China

autor

Wu Zhiqiang

• School of Mechanical Engineering, Tianjin University, Tianjin, China

Bibliografia

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Uwagi

„Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).”