充气尾翼湿模态分析与试验研究

摘要

In order to analyze modal characteristics of complex shape pneumatic empennages,based on the potential flow theory and pre-stressed rigid model,the analysis method to calculate the air added mass of a triangle element was proposed by using the equivalent area parameter of a triangle element.And a numerical procedure based on Abaqus UEL was developed in sequence.The benchmark test of a circular membrane demonstrated the validity of the method.The analyses and tests for complex shape pneumatic empennages showed that the proposed analysis method can get precise results.The results were valuable to investigate modal behavie other complex shape pneumatic structures,such as, airship.%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。对飞艇等复杂充气结构模态特性研究具有参考价值。