Advisory system development for reliable FEM modelling in aerospace

Abstract

Purpose -This paper aims to describe the development of an advisory system that helps building sound finite element (FE) models from computer-aided design data, with actual uncertainty levels expressed by error values in per cent, as today there is no widely accepted tool for FE idealisation error control. Design/methodology/approach -The goal is to provide a computer-aided engineering (CAE) environment which assists the FE modelling phase. A demonstration program has been developed that leads the user through a step-by-step process and helps to detect idealisation errors. Uncertainties are identified and analysed following the procedure. An example illustrates the methodology on the collapse analysis of aerospace stiffened panels. Findings -The design shows how a knowledge-based system can be used to aid a safe virtual product development.Research limitations/implications -The extension of current CAE environments is difficult, as the programs do not provide sufficient flexibility, changeability and FE solver independence. New developments can take the presented concept as a starting point. Practical implications -The application of error control strategies increases the FE modelling fidelity and can prevent incorrect design decisions. The practical conversion of FE idealisation support depends on the ambitions of CAE software providers. Originality/value -This research shows how a previously paper-and-pencil-based error control procedure can be transformed to an easy-to-use tool in modern software.

The Researching of CAE Intelligent Assisted System

“…In other fields, the research of IAES has been carried on, and the technology is more and more mature. In literature [2], Xinyu zhu introduces a Diagnostic Expert System for Hydraulic System of Aircraft Based on CLIPS, the system adopts the forward reasoning to build the basic structure and combined with fault tree knowledge and finite element analysis method to diagnosis and reasoning; In literature [3], Akio MIYOSHI, Genki YAGAWA research an interface agent system for CAE, according to human-computer interaction make the system know the analysis intent of user and gives the corresponding solutions; In literature [4], Laszlo Hetey, fames Campbell describe the development of an advisory system that helps build sound finite element (FE) models from computer-aided design date, introduce some development technologies and ideas about Intelligent Assisted System; Literature [5] present a vision of a knowledge-based system for more intelligent post-processing as a part of the optimization cycle leading to optimal solutions more efficiently. A series of literatures to provide feasibility ensure and technical reference for the development of CAE Intelligent Assisted System.…”

Simulación numérica de la transmisión indirecta estructural y de la transmisión del ruido de impactos en edificios

“…De acuerdo con estas características, se estudiarán con más detalle la transmisión de ruido de impactos y las transmisiones por flancos entre recintos adyacentes. Para los cálculos mediante el FEM, se utilizara el programa I-DEAS, ya utilizado en otras investigaciones en este campo (Braun et al 2002;Saarinen et al 2002;Dascotte 2004;Hetey 2009;Allemang et al 2012;Hetey et al 2015;Tager et al 2015).…”

“…En el campo aeroespacial, Hetey et al (2015) proponen un sistema de asesoramiento para guiar al usuario durante el proceso de construcción del modelo de elementos finitos, en base a las incertidumbres, con el fin de conseguir unos resultados fiables.…”