摘要
采用无压浸渗复合新方法,用高体份(55%～57%)SiC/Al复合材料制备了机载光电稳定平台内有效载荷的主承力框架。并对其微观结构特征、基本的力学及热物理性能予以表征。由于该材料优异的结构承载功能及卓越的热控功能,利用有限元分析工具并结合试验研究表明:相较于常用的铝合金材料,整个内框架最大变形量减少了65%以上,基频提升了70%,取得了显著的轻量化效果并改善了结构动态响应。检测结果表明:系统的稳定精度达到20 rad。经外场试飞考核,系统性能稳定可靠。成功地将SiC/Al复合材料应用于机载光电稳定平台,为航空新材料的应用做出了有效的探索。
The inner frame of the unmanned airborne optoelectronic stabilization platform was fabricated with the aluminum matrix composites with high volume fraction（55%～57%） fraction SiC particles based on a novel pressureless infiltration fabrication technology,and the microstructures,mechanical and physical properties were characterized.Benefiting from the composite＇s good mechanical properties,such as ultra-high modulus,low thermal expansion coefficient and very high thermal conductivity,the maximum deformation of the inner frame has decreased by 65%,and the fundamental frequency has increased by 70% as compared with those of aluminum alloy materials.Therefore,a significant lightening effect was achieved and the structure＇s dynamic response is improved.The test result indicated that the stable accuracy of the system achieves 20%erad.The system＇s dependable performance in shown by trial flight.The research applies the SiC/Al composites to airborne photoelectric platforms,which makes an effective exploration for the new aviation material＇s application.
出处
《长春理工大学学报（自然科学版）》
2011年第1期130-133,共4页
Journal of Changchun University of Science and Technology(Natural Science Edition)
基金
国家973重点基础发展规划资助项目(2009CB72400105)
国家863高技术研究发展计划资助项目(2008AA121813)
