美国空军研究实验室开发了一种用于复合材料的独特设计及结构分析软件并将其用于制造直升机及其他旋翼机。该软件称作B-样条分析法(BSAM),可以快速并低成本用来表征及预测结构中的缺陷及损伤。这种技术是由该实验室与代顿研究所大学(U-DRI)及联合技术研究中心(UTRC)合作开发并转让到西科斯基飞机公司的。美国空军的低成本航空复合材料结构计划的重点放在设计及制造高度整体化结构上,重点是取消接头及紧固件从而降低成本,如胶结结构。但缺乏评估胶结接头完整性的无损检测技术,同时不能预测这些接头在环境或使用条件下的长期性能及损伤容限。这些复合材料对现今的模拟技术提出了大的挑战,特别是在评估复合材料结构的损伤容限上,因传统的损伤评估依赖的是减少风险的试验以及详细的有限元素模型(FEM)。而BSAM可在设计早期阶 The U.S. Air Force Research Laboratory has developed and used a unique design and structure analysis software for composite materials in the manufacture of helicopters and other rotorcraft. Called B-Spline Analysis (BSAM), the software can be used to characterize and predict defects and damage in structures quickly and at low cost. The technology was developed and transferred to Sikorsky Aircraft Corporation by the laboratory in collaboration with the University of Dayton Research Institute (U-DRI) and the United Technologies Research Center (UTRC). The USAF’s Low Cost Aerospace Composite Structures program focuses on the design and manufacture of highly integrated structures with a focus on reducing costs such as cemented structures by eliminating joints and fasteners. However, there is a lack of nondestructive testing techniques for assessing the integrity of cemented joints, and the long term performance and damage tolerance of these joints under ambient or service conditions can not be predicted. These composites present major challenges to today’s simulation technology, especially in assessing the damage tolerance of composite structures, as traditional damage assessment relies on risk reduction experiments and detailed finite element models (FEM). The BSAM can be designed early stage