全尺寸无缝声衬静声联合载荷仿真分析研究  

Simulation of Combined Static and Acoustic Loads of Full-Scale Seamless Acoustic Liner

作　　者：杭超 王晨 薛东文[1] 徐健[1] HANG Chao;WANG Chen;XUE Dong-wen;XU Jian(AVIC Aircraft Strength Research Institute,Xi’an Shanxi 710065,China)

机构地区：[1]中国飞机强度研究所,陕西西安710065

出　　处：《计算机仿真》2022年第1期29-33,共5页Computer Simulation

摘　　要：针对全尺寸无缝声衬在静声联合载荷作用下难以直接仿真分析的问题,采用旋转对称边界和对称边界对全尺寸声衬模型进行简化,并用薄壁圆筒算例验证了简化方法的合理性,然后分析了简化后的声衬结构在静载和声载联合作用下的力学响应。得出声衬结构在静声联合载荷作用下同时受到恒定静载应力和交变声载应力,声衬在整体鼓包振型对应的固有频率下,受到的声载应力最大,最大应力位置位于穿孔板中心对称面处。最后结论是声衬整体鼓包振型对声载应力有重要影响,在声衬结构强度设计中应重点关注。In order to solve the problem that it is difficult to directly simulate the full-scale seamless acoustic liner under the combined static and acoustic loads, the rotational symmetrical boundary and symmetrical boundary were used to simplify the full-scale acoustic liner model. The rationality of the simplified method was verified by the example of thin-walled cylinder. Then, the mechanical response of the simplified acoustic liner structure under the combined static and acoustic loads was analyzed. The results show that the acoustic liner structure is subjected to constant static stress and alternating acoustic stress at the same time. Under the natural frequency corresponding to the overall drum vibration mode, the maximum acoustic stress is located at the central symmetrical plane of the perforated plate. Finally, the conclusion is that the overall drum shape of the acoustic liner has an important influence on the stress of the acoustic load, which should be paid more attention to in the strength design of the acoustic liner structure.

关 键 词：声衬 声激励 旋转对称边界 固有频率 

分 类 号：V271.4[航空宇航科学与技术—飞行器设计]