面向增材制造的飞行器承力结构多功能化设计方法研究

项目名称： 面向增材制造的飞行器承力结构多功能化设计方法研究

项目编号： No.11332004

项目类型： 重点项目

立项/批准年度： 2014

项目学科： 数理科学和化学

项目作者： 刘书田

作者单位： 大连理工大学

项目金额： 300万元

中文摘要： 被誉为“第三次工业革命”最具标志性的生产工具的增材制造技术，经过近30年的发展，已经能够实现高度复杂结构的自由“生长”成形，基本解决了制造中的两大关键之一的“如何制造”问题。本项研究针对另一关键问题--“制造什么”，以飞行器结构多功能化设计需求为背景，研究建立多功能结构构型设计的理论和方法以及可实现残余应力缓和的制备进程设计方法。具体研究内容与成果包括：1）研究建立多层级结构构型的设计方法与多尺度表征方法、非均质梯度材料结构构型与材料布置协同设计方法、多功能协同设计方法等设计方法，设计能够实现轻量化整体结构的多层级结构构型、非均质梯度材料结构构型以及含流道的具有承载与传输（输油、气等）和隐身性能于一体的多功能壁板式结构构型；2）研究激光熔池的运动轨迹的设计方法、分块制造整体熔合中区域布置的设计方法，设计实现制备残余热应力最小的制造进程方案。

中文关键词： 多功能结构;增材制造;多层级结构构型设计;拓扑优化;制造进程设计

英文摘要： Acclaimed as the most representative manufacturing technology in the “third industrial revolution”, additive manufacturing rapidly developed in 30 years has the ability of making highly complex structures of virtually any shape from a digital model, which fundamentally solved the problem of “How to Make” designated as one of the two key problems in full-scale production. For the other key problem of “What to Make” in the field of multi-functional design of aircraft structures, this project aims to develop a systematic theory and method for the design of multi-funcitional strucutres and propose effective methods for the design of the manufacturing process applicable to residual stress relaxsion. The project will include the following contents and achievements: 1) establish and propose theories and methods including design methods and multi-scale characterizaiton method for hierarchical structures, integrated design methods of structrual configuration and material layout of heterogeneous gradient materials, multi-functional collaborative design method and so on, thus, propose effective structural configurations of hierarchical materials, heterogeneous gradient materials and channel-imbeded multifunctional panel structures integrating functions of load bearing, oil transmission and heat tranfer; 2) investigate and propose the design method for the trajectory of the laser melt pool, area layout method in the block and integer melting process, and propose machining process schemes to minimize the residual thermal stresses.

英文关键词： Multifunctional Structures;Additive manufacturing;Hierarchical Design;Topology optimization;Manufacturing Process