摘要
Improving structures involves comparing old and new designs on a key parameter.Calculating the percent change in performance is a method to assess.This paper proposes a cost-effective analogy by generating replicas of additive manufactured aluminum alloy(Al Si10Mg)body-centered cubic lattice(BCC)based turbine blade(T106C)with the same in poly-lactic acid(PLA)material and their comparison in the context of percent change for natural frequencies.Initially,a cavity is created inside the turbine blade(hollow blade).Natural frequencies are obtained experimentally and numerically by incorporating BCC at 50%and 80%of the cavity length into the hollow blade for both materials.The cost of manufacturing the metal blades is 90%more than that of the PLA blades.The two material blade designs show a similar percentage variation,as the first-order mode enhancs more than 5%and the second-order mode more than 4%.To observe the behavior in another material,both blades are analyzed numerically with a nickel-based U-500 material,and the same result is achieved,describing that percent change between designs can be verified using the PLA material.
结构性能的改进涉及对新旧设计模型所选参数的比较,计算它们之间的百分比变化是一种评估方法。本文提出了一种具有成本效益的方法,生成基于增材制造铝合金(AlSi10Mg)的体心立方晶格(Body-centered cubic lattice,BCC)涡轮叶片(T106C)与聚乳酸(Poly-lactic acid,PLA)材料中的相同物质,比较固有频率下的百分比变化。首先,在涡轮叶片(空心叶片)内部形成一个空腔。然后,将腔体长度的50%和80%的BCC掺入两种材料的空心叶片中,获得固有频率。金属叶片的制造成本比PLA叶片高出90%,而两种材料叶片设计显示出相似的百分比变化,一阶模式的增强超过了5%,二阶模式的增强超过了4%。为了观察另一种材料,使用镍基U-500材料对两个叶片进行了数值分析,取得了相同的结果。结果说明可以使用PLA材料验证设计之间的百分比变化。
基金
supported by the National Natural Science Foundation of China(No.12111540251)。
