能量法研究矩形填充多孔材料夹芯层面内等效模量

Research on Equivalent Modulus of Sandwich Core Plane for Rectangular Fill Materials Use Energy Method

多孔材料作为一种新材料体系被大量运用于航空航天等领域,其夹层结构是大型风力发电机叶片的重要组成元件。为了节省生产成本、提高产品质量和结构安全性,以及对叶片的设计、改造和优化,其夹层结构夹芯层的等效力学参数研究是十分必要的。目前对于夹芯中填充其他材料的分析大多是忽略了填充材料带来结构性能的影响。本文针对矩形填充多孔材料夹芯层的特点,提出了十字填充模型,接着从能量的角度出发,推导出矩形填充材料夹芯层面内等效模量,并将能量法推导出的结果和从变形分析角度得出的结果进行对比,得到两种方法的计算结果完全一致的结论,从而验证了能量法的合理性,为将来深入研究矩形填充材料夹层结构的其他等效参数提供理论依据,也为叶片结构的改造和优化提供技术支持。

Porous materials have been widely used in the fields of spaceflight, aviation as a new material system, the sandwich structure is the most important component material in the vane of huge aero generator. To save cost and improve product quality and security, for design, improve change and optimize the vane, it is necessary to do research in the sandwich core of porous materials. Now it overlooks the influence of structure capability with filled materials in the research of filled sandwich core. The sandwich core plane equivalent modulus for rectangle fill materials facing its own characteristic was derived based on cross filled model by using energy method. It contrasts with the results from the energy method and the load analysis method and gets the conclusion that the results from two methods are the same. It proves the rationality of the energy method and provides a theoretical basis for deeply studying rectangular fill material sandwich structure and provides a technical support of vane modifying optimizing in future.