结合数值模拟与物理实验的叶片锻造预成形拓扑优化设计研究  

Optimal Design for Preform of Blade Forging by Topological Algorithm Combined with Numerical Simulation and Physical Experiment

作　　者：郭平义[1] 陆彬[2] 邵勇[1] 

机构地区：[1]江苏科技大学先进焊接技术省重点实验室,江苏镇江212003 [2]上海交通大学模具CAD国家工程研究中心,上海200030

出　　处：《稀有金属材料与工程》2017年第2期461-467,共7页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(51005150)

摘　　要：利用所提出的拓扑优化方法,对复杂形状叶片锻造的预成形形状进行了优化设计。详细给出了该方法在三维模式下的优化策略、优化目标、单元增删准则、几何模型处理等关键技术。以合理精简毛坯、提高模腔充填性为综合优化目标,利用自行开发的优化程序,经过十余次的优化迭代,获得了理论上的优化结果。研制了叶片锻造模具,对优化后的预成形件进行了锻造成形实验;利用激光测量设备采集了叶片锻件型面的几何数据,并与数值模拟结果进行了比对。对预成形件制备工艺的可行性进行了详细讨论。结果表明:基于拓扑优化方法所获得的叶片预成形设计结果较为理想。Preform design of blade forging has been optimized by a developed topology method.The key techniques of 3D topology optimization included optimization strategy,optimization objectives,element addition and removal criterion and geometry model treatment.To fulfill the objective of increasing raw material utilizing rate and die-filling rate,a theoretical optimized preform has been obtained after optimization iterations of 10 times based on the self-programmed code.Blade forging experiments were implemented to validate the formability of optimized preform form.Aerofoil section profiles extracted from actual forged blade by the laser measure equipment were compared with that from the FE results.The preparation technique of optimized preform was also discussed.A satisfactory optimal result of preform design has been achieved by using the topological method.

关 键 词：叶片锻造 预成形优化 拓扑算法 镦挤成形技术 

分 类 号：TG316[金属学及工艺—金属压力加工]