AEROELASTIC PROPERTIES OF SANDWICH BEAM WITH PYRAMIDAL LATTICE CORE CONSIDERING GEOMETRIC NONLINEARITY IN THE SUPERSONIC AIRFLOW

被引：11
|
作者：
Li, Fengming [1 ,2 ]
Song, Zhiguang [2 ]
Sun, Chunchun [3 ]
机构：
[1] Beijing Univ Technol, Coll Mech Engn, Beijing 100124, Peoples R China
[2] Harbin Inst Technol, Sch Astronaut, Harbin 150001, Peoples R China
[3] Hong Du Aviat Ind Grp, Nanchang 330024, Peoples R China
来源：
ACTA MECHANICA SOLIDA SINICA | 2015年 / 28卷 / 06期
基金：
中国国家自然科学基金;
关键词：
sandwich beam; pyramidal lattice core; geometric nonlinearity; aeroelastic flutter; supersonic flow; VIBRATION; FLUTTER; OSCILLATIONS; PANELS; SOUND;
D O I：
10.1016/S0894-9166(16)30005-2
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The equation of motion of sandwich beam with pyramidal lattice core in the supersonic flow considering geometric nonlinearity is formulated using Hamilton's principle. The piston theory is used to evaluate aerodynamic pressure. The structural aeroelastic properties are analyzed using frequency- and time-domain methods, and some interesting phenomena are observed. It is noted that the flutter of sandwich beam occurs under the coupling effect of low order modes. The critical flutter aerodynamic pressure of the sandwich beam is higher than that of the isotropic beam with the same weight, length and width. The influence of inclination angle of core truss on flutter characteristic is analyzed.
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页码：639 / 646
页数：8
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