GOALI/Collaborative Research: Understanding and Controlling Variation Propagation in Periodic Structures: From Geometry to Dynamic Response

GOALI/合作研究：理解和控制周期性结构中的变异传播：从几何到动态响应

基本信息

批准号：
0900275
负责人：
Jiong Tang
金额：
$ 14.33万
依托单位：
University of Connecticut
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2009
资助国家：
美国
起止时间：
2009-06-01 至 2014-05-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=0900275&HistoricalAwards=false
关键词：
GOALI Collaborative Research Understanding Controlling

项目摘要

The objective of this collaborative research is to understand and control the variation propagation between product geometry and its dynamic response in periodic structures. Manufacturing processes are inherently imprecise, producing products that vary in geometry. The geometry variation detrimentally impacts not only the fitness of the final assembly, but also in many cases the functionalities of the final product. In this research, we will model and analyze the variation propagation in periodic structure from the manufactured part geometry to its dynamic response and then to provide guidelines on mitigating the undesirable dynamic response via controlling the mean and variation of part geometry. The proposed methodology includes variation propagation analysis in two directions: (i) In the forward prediction, the geometry variation of the manufactured products is characterized based on dense measurements, and then the probabilistic distributions of the dynamic responses are computed. (ii) In the backward analysis, using the abnormal dynamic response as input, a group of local geometric features that, upon modification, can mitigate the undesirable dynamic response are identified. If successful, this research will positively impact a variety of periodic structural products, including bladed-disks in aero-engines and power generation equipment, cutting tools in high speed machining, and space antenna, etc. Through the collaboration with General Electric, this research will directly benefit a host of industries such as aerospace, automotive and manufacturing industries where these periodic structures are used. Through its integrated research, education and outreach activities, this project will provide advanced knowledge in variation propagation and reduction for students from high schools to graduate schools and will enhance domestic students? interest in science and engineering and therefore strengthen our competitiveness in the global workforce.

这项协作研究的目的是了解和控制产品几何形状与周期结构中动态响应之间的变化。制造工艺本质上是不精确的，生产的产品在几何形状上有所不同。几何变化不仅会影响最终组装的适应性，而且在许多情况下也影响了最终产品的功能。在这项研究中，我们将建模并分析从制成部分几何形状到其动态响应的周期性结构的变化传播，然后通过控制零件几何形状的平均值和变化来减轻不良动态响应的指南。提出的方法包括两个方向的变化传播分析：（i）在正向预测中，基于密集的测量值对制成品的几何变化进行表征，然后计算动态响应的概率分布。（ii）在向后分析中，使用异常的动态响应作为输入，一组局部几何特征在修改后可以减轻不良的动态响应。如果成功的话，这项研究将对各种周期性结构产品产生积极影响，包括航空引擎和发电设备中的垂直盘，高速加工中的切割工具以及太空天线等。通过与通用电气的合作，这项研究将直接受益于诸如航空航天，自动化行业，自动型和制造工业等诸如这些周期性结构的工业。通过其综合研究，教育和外展活动，该项目将为高中学生到研究生院的学生提供差异传播和减少的高级知识，并会增强家庭学生吗？对科学和工程的兴趣，因此增强了我们在全球劳动力中的竞争力。