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Associative parametric CAE methods in the aircraft pre-design

机译：飞机预设计中的关联参数CAE方法

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摘要

Aircraft manufacturers are facing several challenges in the pre-design of aircraft structures. This early stage of the aircraft design has a very multi-disciplinary character. Different competence centres need input data, which is at this point in time to a large extent undefined. Therefore, a large variety of specialised tools is used in order to estimate and predict the required data. If these tools are not compatible, interface problems are the consequence. A permanent improvement of the applied processes with regard to the informal value as well as the applicability remains a continuous challenge. The objective of a collaboration project between Airbus Germany GmbH, the DLR Braunschweig, and the ETH Zurich is to find new methods and approaches to improve accuracy, efficiency, and flexibility of data prediction for primary aircraft structures. The use of modern CAE systems together with the integration of finite element methods into the early pre-design process is a very promising approach [F. Bian-coni, P. Conti, N. Senin, D.R. Wallace, CAE systems and distributed design environments, in: XII ADM International Conference, Italy, 5-7 September, 2001; M. Pellicciari, G. Barbanti, A.O. Andrisano, Functional requirements for a modern CAD system, in: XII ADM International Conference, Italy, 5-7 September, 2001; T. Richter, H. Mechler, D. Schmitt, Integrated parametric aircraft design, in: ICAS 2002 Congress, Institute of Aeronautical Engineering, TU Munich]. The modular and knowledge-based architecture of modern CAE systems allows to represent complex assemblies like aircraft structures by parametric associative and very dynamic models. Design knowledge can be integrated into the modelling [M. Maentylae, S. Finger, T. Tomiyama, Knowledge Intensive CAD, vol. 2, Chapman & Hall, 1997] and different characteristics or individuals of the same structure can be mapped through parameters. This document presents concepts, which allow to design comprehensive digital models of novel aircraft structures whereas the level of the modelling detail shall be variegated flexibly [D.E. Whitney, R. Mantripragada, J.D. Adams, S.J. Rhee, Designing assemblies, Res. Engrg. Design 11 (1999) 229-253; P. Aspettati, S. Barone, A. Curcio, M. Picone, Parametric and feature-based assembly in motorcycle design: from preliminary development to detail definition, in: XII ADM International Conference, Italy, 5-7 September, 2001]. The strongly parameterised structures allow calculating and assessing different individuals of a given structure in a very efficient and automated way. This makes parametric associative structures very suitable for optimisation. After structural optimisation tasks have successfully been performed with parametric models [U.M. Fasel, O. Koenig, M. Wintermantel, N. Zehnder, P. Ermanni, DynOPS - an approach to parameter optimization with arbitrary simulation software, Centre of Structure Technologies, ETH Zurich; O. Koenig, R. Puisa, M. Wintermantel, P. Ermanni, CAD-entity based evolutionary design optimization, Centre of Structure Technologies, ETH Zurich, and VGTU, Faculty of Mechanics, Vilnius, Lithuania; U.M. Fasel, O. Koenig, M. Wintermantel, P. Ermanni, Using evolutionary methods with a heterogeneous genotype representation for design optimization of a tubular steel trellis motorbike-frame, Centre of Structure Technologies, ETH Zurich], multi-disciplinary optimisations are gaining importance, since they have the potential to find global optima instead of the discipline-dependent optimal configurations and solutions.
机译：飞机制造商在飞机结构的预设计中面临若干挑战。飞机设计的早期阶段具有非常多学科的特征。不同的能力中心需要输入数据，这在很大程度上是不确定的。因此，为了估计和预测所需的数据，使用了各种各样的专用工具。如果这些工具不兼容，则会导致接口问题。关于非正式价值以及适用性的应用程序的永久改进仍然是持续的挑战。空中客车德国公司，DLR布伦瑞克航空公司和苏黎世联邦理工学院之间的合作项目的目的是寻找新的方法和方法，以提高主要飞机结构数据预测的准确性，效率和灵活性。现代CAE系统的使用以及将有限元方法集成到早期的预设计过程中是非常有前途的方法[F. Bian-coni，P.Conti，N.Senin，D.R。华莱士，CAE系统和分布式设计环境，发表于：2001年9月5日至7日，意大利，第十二届ADM国际会议； M.Pellicciari，G.Barbanti，A.O。 Andrisano，现代CAD系统的功能要求，见：2001年9月5日至7日，意大利，第十二届ADM国际会议； T. Richter，H。Mechler和D.Schmitt，综合参数飞机设计，在：ICAS 2002大会，慕尼黑工业大学航空工程学院]。现代CAE系统的模块化和基于知识的体系结构允许通过参数关联和动态模型来表示复杂的装配体，例如飞机结构。设计知识可以集成到建模中[M. Maentylae，S。Finger，T。Tomiyama，知识密集型CAD，第1卷。 [2，Chapman＆Hall，1997]和不同特征或具有相同结构的个体可以通过参数进行映射。本文档介绍了一些概念，这些概念允许设计新颖的飞机结构的全面数字模型，而建模细节的级别应灵活变化[D.E.惠特尼（Whitney），曼帕特拉格达（R.Mantripragada），亚当斯（J.D. Rhee，设计装配体，Res。 gr设计11（1999）229-253； P. Aspettati，S。Barone，A。Curcio，M。Picone，摩托车设计中基于参数和特征的装配：从初步开发到细节定义，见：2001年9月5日至7日，意大利第十二届ADM国际会议。高度参数化的结构允许以非常有效和自动化的方式计算和评估给定结构的不同个体。这使得参数关联结构非常适合优化。在使用参数模型成功完成结构优化任务后， Fasel，O。Koenig，M。Wintermantel，N。Zehnder，P。Ermanni，DynOPS –一种使用任意仿真软件进行参数优化的方法，苏黎世联邦理工学院结构技术中心； O. Koenig，R。Puisa，M。Wintermantel，P.Ermanni，基于CAD实体的进化设计优化，苏黎世联邦理工学院结构技术中心，立陶宛维尔纽斯力学学院VGTU； U.M. Fasel，O。Koenig，M。Wintermantel，P。Ermanni，使用具有异质基因型表示的进化方法对管状钢格架摩托车车架进行设计优化，苏黎世联邦理工学院结构技术中心，多学科的优化正变得越来越重要，因为它们有可能找到全局最优值，而不是依赖于学科的最优配置和解决方案。

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