摘要
平流层飞艇是依靠浮力升空的飞行器。飞艇外形对于平流层飞艇的设计至关重要,为了获得能够满足动力结构和重量等各个学科要求的最优艇形,将综合设计优化技术引入到飞艇外形设计中,提出了适用于优化的飞艇外形生成曲线,分析了与外形有关的气动、结构和重量等因素,建立了飞艇气动阻力、表面积和最小环向应力的模型,构造了复合目标函数,并针对某飞艇外形进行了优化设计。仿真结果证明,利用蒙特卡罗算法优化设计后的艇形优于传统艇形。
Airship shape is really crucial to the design of stratosphere airship. In order to obtain the optimum shape which meets demands of various disciplines,multidisciplinary design optimization technology is introduced into the design of airship envelope shape,and shape curve generation algorithm fitting for optimization is proposed. The factors involved aerodynamics,structure and weight are analyzed,and models of aerodynamic drag,surface area and minimum hoop stress are built. A composite objective function is devised,based on which the shape is optimized. Simulation results show that the optimized shape has been improved compared to the reference shape.
出处
《计算机仿真》
CSCD
北大核心
2010年第9期44-47,87,共5页
Computer Simulation
基金
国家高新技术研究发展计划(863)项目(2007AA705003)
关键词
平流层飞艇
飞艇外形曲线
最小环向应力
艇形优化
Stratosphere airship
Airship shape curve
Minimum hoop stress
Shape optimization
