中文摘要：

针对3D打印材料费用昂贵问题,提出一种改进的蒙皮-桁架结构快速构建与优化方案,使打印模型的体积在满足产品物理机械性能、受力平衡性、自平衡性和可打印性等多约束条件下实现最小化,达到节省打印耗材、降低成本的目的.利用网格简化策略快速构建表层桁架结构,与原始网格模型在拓扑上保持相似性,避免桁架与蒙皮之间的冲突;基于实验分析,提出无内节点的内部桁架构建方法,可大幅缩短整体优化时间,且可在保证满足力学约束条件下获得更优的节材效果;将力学准则法与粒子群优化算法有机结合,利用满应力法计算桁架结构的支杆半径作为优化算法的初始值,提高算法在全局范围内搜索最优解的能力和效率,实现桁架结构支杆截面尺寸与系统拓扑结构协同优化的目标.实验结果表明,该方法健壮、有效,具有成本优势和效率优势.

英文摘要：

In order to achieve the goal of saving material and lowering the cost,a scheme is proposed to quicklybuild and optimize improved skin-truss structure,which minimizes the volume of the printing objects under constrainedconditions including physical and mechanical properties,force balance,self-balance,and printability.Amesh simplification strategy is utilized to rapidly build exterior truss structure,which maintains topology similarityof the original mesh to avoid conflicts between truss and skin.A method based on experimental analysis is putforward to construct interior truss structure without interior nodes,which not only can significantly shorten theoverall optimization time,but also achieves better results in saving material under mechanical constraints,combiningmechanics criteria method and particle swarm optimization algorithm,utilizing full stress method to calculatethe strut radius of the truss structure,and considering them as initial value of the optimization algorithm,improving the capacity and efficiency of the algorithm in the search for globally optimal solutions,and realizingto optimize the cross-sectional dimensions and the topological structure of truss structure simultaneously.The testresults show that the method described above is robust,efficient and cost-effective.