摘要
为探讨C/C复合材料应用于指尖密封的可能性,通过有限元方法和正交设计对2.5维C/C复合材料和金属材料2种指尖密封进行模态分析。分析结果表明:2种材料指尖密封的结构参数对其固有特性的影响是一致的,即其前两阶固有频率均随着中心形成圆直径的增加而增加,随着指尖梁个数的增加而减小,而2.5维C/C复合材料指尖密封的同阶固有频率高于金属材料指尖密封的固有频率。2.5维C/C复合材料可以在不改变指尖密封结构特性的同时提高其固有频率,从而改善指尖密封的密封性能,这对于提高航空发动机的工作性能具有重要意义。
In order to discuss the application possibility of C/C composites on finger seals, the modal analysis of the finger seals made by 2. 5D C/C composites and metal separately was performed by finite element method and orthogonal design method. The results show that the influence of structural parameters on inherent characteristics of 2. 5D C/C com- posites finger seals and the metal finger seals is consistent, that is, the first two-order natural frequency is increased with the increase of the stick arcs circle of centers and is decreased with the increase of finger numbers. The 2. 5D C/C com- posites finger seals＇ natural frequency at the same order is higher than the metal finger seals＇. Therefore, 2. 5D C/C com- posites can increase the finger seals＇ natural frequency without changing the structural characteristics, and improve the fin- ger seals＇ sealing performance.
出处
《润滑与密封》
CAS
CSCD
北大核心
2013年第4期49-51,56,共4页
Lubrication Engineering
