摘要
与全机有限元模型的建立相比 ,确认这个模型的可靠性 ,在某种意义上说更困难也更重要。本文简要介绍了某型飞机全机有限元模型的修正与确认工作的经验。确认后的有限元模型数据冻结起来 ,将作为该型号飞机有限元分析基础的数据库文件。通过静力试验实测值和已建立的有限元模型给出的计算值的比较 ,再运用以力学知识为基础的经验判断误差位置和误差性质 ,就能进一步修改完善有限元模型 ,使之能给出与静力试验实测值相一致的结果。这个模型被确认为是可靠的有限元模型 ,不是单纯的理论模型 ,而是经过检验的合格模型 ,它是可以用来解决实际问题的有实际价值的模型。它用于型号改型、改进设计的各个方面 ,会令设计者和用户放心 。
Validating the reliability of a finite element model of an aircraft is more difficult but important than setting up it in a sense. The correction and validation of a finite element model of aircraft is described in this paper.Validated FEM data were frozen, as a database for the finite element model (FEM) analysis on the aircraft, Comparing static testing data with theresults of the FEM, and using experience based on mechanics knowledge to judging the position and property of error, the FEM would be modified and perfected, bring the results of the FEM and data that obtained from static test into accord. The modified FEM is validated to be a credible model. It isn′t a pure theory model but an applicable model that can be used in aircraft design.
出处
《飞机设计》
2004年第2期37-41,共5页
Aircraft Design
