含穿透损伤复合材料桨叶结构静强度分析

受弹伤后桨叶结构的静强度、动态特性和剩余寿命等是复合材料直升机旋翼桨叶结构损伤容限设计必须研究的问题.选取某直升机复合材料桨叶靠近桨根的翼段结构,利用CATIA建立三维实体模型,并导入ANSYS软件建立有限元分析模型,分别对翼段不同位置、不同方向的穿透损伤情况进行桨叶结构静强度分析.应用APDL参数化设计语言,开发了计...

Static Strength Analysis of Composite Rotor Blade with Penetration Damage

The static strength, dynamic characteristic and residual life of helicopter composite rotor blades shocked by a bullet must be studied in the rotor blade damage tolerance design. By choosing a blade segment adjacent to the root of a certain helicopter rotor blade, CATIA was used to establish the 3D model of the blade segment, and then its finite element model was worked out through ANSYS software. The static strength of the rotor blade segment structure with different position and direction penetration damage was analyzed. By the APDL （ ANSYS Parameter Design Langnag）program of the software, the stress and strain nephogram of the blade structure, and the strength ratios of each component were got under coeffect of centrifugal force, flapping moment and shimmy moment without considering the gravity of the blade segment itself. It is shown that the strength ratios of the blade beam and skin are all greater than 1 in each damage case, which means that the beam and the skin are safe with penetration damage. But the front spar, the rear spar and the wing box will fail after they are shocked by penetration damage, which would affect the static strength of the rotor blade.