为分析复杂形状充气尾翼的模态特性，基于势流理论和预应力刚化模型，提出采用单元尺度的三角形单元等效单元面积特征参数，建立三角形单元附加质量的计算方法，应用Abaqus的UEL二次开发建立了数值分析方法。通过经典的平面圆形薄膜试验验证了方法，并对复杂形状充气尾翼的模态进行了分析与试验，两者结果吻合较好。本文对飞艇等复杂充气结构模态特性研究具有参考价值。
Abstract
In order to analyze the modal characteristics of complex shape pneumatic empennage, based on the potential flow theory and pre-stressed rigid model, the analysis method to calculate the air added mass of the triangle element is proposed by using the equivalent area parameter of the triangle element. And a numerical procedure based on Abaqus UEL is developed in sequence. The benchmark experiment of the circular membrane demonstrates the validity of the method, and the analyses and experiments on the complex shape pneumatic empennage show that the analysis method can get precise results. This paper is valuable to investigate the modal behavior of other complex shape pneumatic structures such as airship.
关键词
充气尾翼 /
空气附加质量 /
UEL /
干模态 /
湿模态
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Key words
Pneumatic empennage /
Air added mass /
UEL /
Dry mode /
Wet mode
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