面向增材制造的飞行器结构优化设计关键问题

摘要

围绕飞行器复杂结构整体构型研制的高性能、轻量化苛刻需求,着重介绍了面向增材制造的结构优化设计面临的系列关键问题以及相关研究成果.分别从面向增材制造的结构多承载环节整体优化建模与性能分析、整体结构多学科性能与功能综合设计方法、跨尺度结构-微结构性能表征与尺度效应的影响机理,以及增材制造工艺对整体结构件性能的影响机理和制造工艺约束4个方面,阐述如何从结构力学与工艺力学角度科学实现最优性能设计与先进增材制造技术的完美匹配与融合.%Conceming the severe demand of lightweight and high performance in aircraft and aerospace complicated integrated structures design,this paper demonstrates the key issues and recent achievements in additively manufactured structures design.Four aspects,i.e.integrated optimization modeling and performance analysis for multiple loading members in additively manufactured structures,multidisciplinary performance and multi-functional design method for integrated structures,performance description and scale effect of the cross-scale structures and microstructures,and the influence of the additive manufacturing process and its manufacturing constraints are expounded here,to show how to achieve the best match of the performance optimization and additive manufacturing with studies on both structural mechanics and processing mechanics.