直升机改装结构风阻的数值分析与试验研究  

Numerical Analysis and Experimental Research on Wind Resistance of Modified Helicopter Structure

作　　者：何美君 李艳军[1] 曹愈远[1] 胡学文 HE Mei-jun;LI Yan-jun;CAO Yu-yuan;HU Xue-wen(Nanjing University of Aeronautics and Astronautics,Nanjing 210000,China)

机构地区：[1]南京航空航天大学,江苏南京210000

出　　处：《航空计算技术》2021年第3期26-31,共6页Aeronautical Computing Technique

基　　金：国家自然科学基金项目资助(50705097);中国民航总局科技基金项目资助(MHRD07z38)。

摘　　要：有限元数值分析技术已经成为航空器性能分析必不可缺的手段之一,但在适航符合性验证中还不够成熟。针对某型直升机光电观测系统的适航取证过程,研究有限元数值分析风阻在适航符合性验证中的应用,根据《正常类旋翼航空器适航规定》(CCAR27-R1)规章条款中关于风阻的具体要求,分别应用理论计算结合试验室试验、有限元分析两种适航符合性验证方法计算直升机光电观测系统的风阻,然后将两种结果作比较,找到有限元分析方法与传统方法相比具有的优势,并说明有限元流固耦合分析结果的可靠性。通过比较分析与验证,证明将有限元流固耦合分析运用到适航符合性验证工作中,可降低直升机改装取证过程的复杂度,减少符合性验证工作的成本。Finite element numerical analysis technology has become one of the indispensable methods for aircraft performance analysis,but it is not mature enough in airworthiness compliance verification.Based on the airworthiness certification process of a certain helicopter photoelectric observation system,this paper researched the application of finite element wind resistance numerical analysis in airworthiness compliance verification.According to the specific requirements on wind resistance in the regulations of Normal Rotorcraft Airworthiness Regulation(CCAR27 R1),this paper calculated the wind resistance of the helicopter observation system by using two airworthiness compliance verification methods theoretical calculation combined with laboratory test and finite element analysis.Then the advantages of the finite element method over the traditional method were found by comparing the two results,and the reliability of the results of the fluid solid coupling finite element analysis was illustrated.It is proved that the application of finite element fluid solid coupling analysis to airworthiness compliance verification can reduce the complexity of the helicopter refitting forensics process and reduce the cost of compliance verification.

关 键 词：适航符合性验证 有限元分析 试验室试验 风阻 

分 类 号：V211.1[航空宇航科学与技术—航空宇航推进理论与工程]