THERMAL STABILITY CHARACTERISTICS AND LIMIT CYCLE OSCILLATION OF SMART SKIN STRUCTURES

Chang-Yull Lee; Ji-Hwan Kim

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THERMAL STABILITY CHARACTERISTICS AND LIMIT CYCLE OSCILLATION OF SMART SKIN STRUCTURES

机译：智能皮肤结构的热稳定性特征和极限循环振荡

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Smart skin structures are analyzed for thermal stability behaviors and limit cycle oscillations in supersonic range of airflows. The skin is made up of multi-layered sandwich panel using carbonlepoxy, glasslepoxy, and dielectric polymer layers. And the model is based on the first-order shear deformation plate theory, and von Karman strain-displacement relationships are used to consider the moderate geometrical nonlinearity of the structure. In order to study the effects of the airflow, first-order piston theory is adopted to represent the pressures. Also, Newmark time integration method is applied to obtain the numerical results in this work. To check the validity of present outcomes, results are compared with previous data. Specifically, the stability boundaries are obtained for various ranges of temperatures and aerodynamic pressures. Then, the regions for buckling, post-buckling, dynamic instability, and limit cycle oscillation of the structures are clearly discussed. For more analysis, the smart skin is investigated for the different sizes and shapes of dielectric portion within enclosure layer in detail.

机译：分析智能蒙皮结构的热稳定性能并限制超音速气流范围内的循环振荡。蒙皮由多层夹芯板组成，该夹层板使用碳环氧，玻璃环氧和介电聚合物层。该模型基于一阶剪切变形板理论，并使用冯·卡曼应变-位移关系来考虑结构的中等几何非线性。为了研究气流的影响，采用一阶活塞理论来表示压力。此外，在这项工作中，采用了纽马克时间积分方法来获得数值结果。为了检查当前结果的有效性，将结果与以前的数据进行比较。具体而言，针对各种温度和空气动力压力范围获得了稳定性边界。然后，清楚地讨论了结构的屈曲，后屈曲，动态不稳定性和极限循环振荡的区域。为了进行更多分析，详细研究了智能蒙皮外壳层中介电部分的不同大小和形状。

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来源
《Journal of thermal stresses》 |2014年第3期|221-235|共15页
作者
Chang-Yull Lee; Ji-Hwan Kim;
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作者单位

Department of Mechanical and Aerospace Engineering, Seoul National University, Seoul, South Korea;

Institute of Advanced Aerospace Technology, Department of Mechanical and Aerospace Engineering, Seoul National University, 1 Kwanak-ro, Kwanak-ku, Seoul 151-744, South Korea;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种 eng
中图分类
关键词
Flutter; Limit cycle oscillation (LCO); Smart skin; Thermal stability boundary;

机译：扑;极限循环振荡（LCO）;聪明的皮肤;热稳定性边界;

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THERMAL STABILITY CHARACTERISTICS AND LIMIT CYCLE OSCILLATION OF SMART SKIN STRUCTURES

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