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A Methodology for Efficient Conceptual Design Analysis of Nonlinear Dynamic Structural Systems

Niclas Andersson (Institutionen för tillämpad mekanik, Dynamik)
Göteborg : Chalmers University of Technology, 2013. - 77 s.
[Licentiatavhandling]

There is a typical requirement conflict between fuel consumption and noise and vibrations in passenger cars. Obviously the combustion engine is a major source of vibration and has an influence on vehicle emissions. Similar properties apply to the power transferring mechanical driveline system. Many driveline design concepts that aim to reduce carbon-dioxide emissions intensify and add new vibration problems, since the majority of them affect vibration sources or system damping. In conceptual design of drivelines, many possible concepts proposals are studied in parallel. This situation calls for modelling and analysis that can meet the demand for rapid virtual prototyping. Conflicting to this is the trend in which models have become extremely detailed to meet demands from others than conceptual designers. The complex behaviour of the driveline system in combination with often highly specialised component models result in system models that at their best are valid only near a few specific stationary operating points. This makes is difficult to study the effectiveness of possible component design changes in early development phases. Instead, this is first revealed during system verification testing, when fundamental design changes since long are unrealisable. This work focus on models for conceptual design, \emph{i.e.} models that are not overparameterized. The aim is to find the balance when models are as simple as possible but as accurate as required by conceptual design studies. A methodology is proposed, based on knowledge of existing automotive methods and workflow, that with provided modelling tools has the potential to serve this purpose within the nearest future.

Nyckelord: Nonlinear dynamics, Flexible multibodies, State-space models, Model order reduction, Component Mode Synthesis, Balanced truncation, Conceptual design models, Driveline systems



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Denna post skapades 2013-08-27. Senast ändrad 2013-08-28.
CPL Pubid: 182358

 

Institutioner (Chalmers)

Institutionen för tillämpad mekanik, Dynamik

Ämnesområden

Transport
Hållbar utveckling
Fastkroppsmekanik

Chalmers infrastruktur

Relaterade publikationer

Inkluderade delarbeten:


Driveline model calibration and validation in an automotive 4-cylinder Diesel application


Examination

Datum: 2013-09-16
Tid: 13:15
Lokal: Delta, Hörsalsvägen 7, Chalmers University of Technology
Opponent: Ph.D. Per-Olof Sturesson, Volvo Car Corporation, Sweden

Ingår i serie

Technical report - Department of Applied Mechanics, Chalmers University of Technology, Göteborg, Sweden 2013:17