This paper demonstrates a suitable way to introduce Uncertainty Management in computer-aided engineering (CAE) and helps to develop more reliable products as well as giving deeper insight into system behaviour. To fulfill the need for shorter development cycles in modern product development the increased use of CAE is one possibility. While the numerical calculation of a model leads to one single solution, the behaviour of systems in the real world is never exactly repeatable due to tolerances and natural scatter in the system parameters. The assessment of the resulting uncertainties is of great importance for systems requiring a high level of reliability (such as aerospace systems), therefore they should be treated with special care in the development process and in particular in CAE. The work describes the execution and analysis of an uncertainty management technique with Stochastic Simulation for a finite-element analysis model of an exemplary system consisting of an overhead bin and carry-on baggage excited by external acceleration. The stochastic simulation results are evaluated using statistical methods. It is shown which parameters are of paramount influence on the system behaviour and may hence result in a critical load due to carry-on baggage. The studied example leads to the following conclusions. A worst case scenario for the structural loading is characterized by a high maximum force and long impulse duration of the force. This will occur at a small gap between the 1st trolley and the front wall of the overhead stowage bin in combination with a large gap between the trolleys. In addition, the worst case is characterized by a big total mass of carry-on baggage with the heavier parts in the rear of the overhead stowage bin. A high initial velocity increases this worst case as well.
Uncertainty management for computer-aided engineering in aircraft cabin development
Unsicherheitenmanagement beim computerunterstützten Konstruieren in der Entwicklung von Flugzeugkabinen
2007
10 Seiten, 9 Bilder, 1 Tabelle, 13 Quellen
Conference paper
English
Uncertainty assessment with stochastic simulation in aircraft cabin development
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