摘要
大多数旋翼结构动力学优化不具备桨叶参数化建模的能力。要想实现真实工程桨叶的优化设计,需要一个从桨叶参数化建模到载荷计算的反复迭代自动化流程,而其桨叶参数化建模和剖面特性特性分析模块在优化过程中非常耗时。为解决以上难题,首先提出一种典型C型梁结构的复合材料桨叶剖面建模方法,并基于Catia知识工程模块,实现桨叶气动外形和内部组件的参数化建模。然后引入拉丁超立方试验设计和多项式响应面代理模型,建立桨叶结构参数和剖面特性的映射关系。通过对模型桨叶和"海豚"直升机桨叶剖面建模,剖面特性误差分析不超过5%,有良好的计算精度,满足工程设计要求。对某复合材料桨叶建立代理模型,用标准方差、平均误差和确定系数来评估精度,表明建立的近似模型对剖面特性具有较好的预测性。
Mostly, the structural dynamic optimization of rotors can not parametrically model the blades very well. To achieve an optimal design of the actual engineering blade, an iterative automated process from parametric modeling of the blade to load calculation is required, and the parametric parameter modeling and profile characteristic analysis module of the blade is time-consuming in the optimization process. To solve the above problems, first, a composite C-beam profile modeling method for a typical C-beam structure was proposed. Based on the Catia knowledge engineering module, parametric modeling of the aerodynamic shape and internal components of the blade was realized. Then the Latin hypercube experimental design method and the polynomial response surface proxy model were introduced to establish the mapping relationship between the blade structure parameters and the profile characteristics. By modeling the model blade and the "dolphin" helicopter blade profile, the error analysis of the profile characteristics does not exceed 5% and has good calculation accuracy to meet engineering design requirements. A proxy model was established for a composite blade, and the standard deviation, mean error, and determination coefficient were used to evaluate the accuracy, indicating that the established approximation model has good predictability for profile characteristics.
作者
周丞
王晨瑛
符烁
刘勇
ZHOU Cheng;WANG Chen-ying;FU Shuo;LIU Yong(National Key Laboratory of Science and Technology on Rotorcraft Aeromechanics,Nanjing University of Aeronautics and Astronautics,Jiangsu Nanjing 210016,China;China Helicopter Research and Development Institute,Tianjing 300300,China)
出处
《计算机仿真》
北大核心
2021年第4期63-68,共6页
Computer Simulation
基金
江苏省研究生科研与实践创新计划项目赞助(SJCX18_0095)。
关键词
复合材料桨叶
参数化建模
剖面特性
试验设计
代理模型
Composite blade
Parametric modeling
Profile characteristics
Experimental design
Agent model
