直升机复合材料桨叶铺层三维几何建模方法

针对直升机复合材料桨叶铺层几何建模过程中存在的效率低、工作繁琐重复等问题,提出了一种桨叶铺层三维几何建模方法。首先系统归纳了典型的桨叶铺层类型,提出了一种面向复合材料铺层几何建模的铺层信息参数化表达方案,并通过一个智能向导引导设计人员对各铺层进行定义和描述,在此基础上由软件算法自动生成桨叶铺层设计表格;根据桨叶理论外形和桨叶铺层设计表格,通过铺层区域裁剪复制和分片逐次等距方法构造桨叶当前铺层几何模型,并实现整个桨叶铺层几何模型的自动生成。通过实例验证表明,该方法能够快速、高效地实现复合材料桨叶铺层的三维几何建模。

Geometric Modeling of Composite Helicopter Rotor Blade Plies

To improve the efficiency of the geometric modeling of composite plies in helicopter rotor blades, a method is presented. First, the typical types of the blade plies are summarized systematically. A parametric composite ply representation scheme is proposed. Designers can specify the ply by an intelligent wizard, which contains a program for converting the user-specified parameters of each ply into a ply design table. Then, according to the blade profile and the ply design table, a geometric model of the ply is constructed by duplicating the current-ply-covered region from the last ply surface and offsetting it by a thickness of the ply. The geometric modeling process of the whole blade can be automatically completed layer by layer in this way. Experimental results demonstrate that the proposed method can complete the geometric modeling of composite blade plies efficiently.