CAJ | 학술논문

针对CFM56-5B型发动机风扇叶片受鸟击问题，目前常采用实验和数值仿真两种方法，前者因成本条件客观问题难以实现，因此本文采用数值仿真来深入研究这一难题。本文运用CATIA三维软件进行建模，最大程度与实际风扇叶片相符，鸟体则采用目前应用广泛的椭球体流线型模型，运用LS-DYNA隐式求解方法对叶片进行离心应力初始化，建立了鸟撞叶片的数值计算模型，分析了鸟撞叶片的动态响应，通过大量仿真，得出鸟撞叶片的机械损伤程度与鸟的速度、受撞击位置之间的关系，为发动机风扇叶片的抗鸟撞设计提供帮助。
침대CFM56-5B형발동궤풍선협편수조격문제，목전상채용실험화수치방진량충방법，전자인성본조건객관문제난이실현，인차본문채용수치방진래심입연구저일난제。본문운용CATIA삼유연건진행건모，최대정도여실제풍선협편상부，조체칙채용목전응용엄범적타구체류선형모형，운용LS-DYNA은식구해방법대협편진행리심응력초시화，건립료조당협편적수치계산모형，분석료조당협편적동태향응，통과대량방진，득출조당협편적궤계손상정도여조적속도、수당격위치지간적관계，위발동궤풍선협편적항조당설계제공방조。
For the CFM56-5B engine fan blades by strike issues, the current two methods are experimental and numerical simulation. Because of objective reason(cost and condition),experimental is difficult to achieve, so this paper use numerical simulation further study the worldwide problem. The use of CATIA software for three-dimensional modeling, consistented with the actual fan blades to the maximum extent. Bird adopted the more popular ellipsoid streamlined model. By LS-DYNA implicit solver methods, initialized on the blades’ centrifugal stress. Establised the numerical model of bird strike blades, and analyzed the dynamic response of bird strike the blades. Through extensive simulations, obtained the relationship between the damage degree of bird strike blades with bird’s speed and impact location, provide help for design anti-bird strike blade of engine fan.