0
Hopp til hovedinnhold

Zuolong Wei disputerer på crash-tester av biler

Zuolong Wei disputerer for ph.d.-graden onsdag 19. april 2017 med avhandlingen Analysis, Modeling and CAE Validation of Vehicle Crashes using Advanced Signal Processing Tools. (Foto: Privat)

This work focused on the relationship between the crashworthiness structures and crash pulses and gave mathematical solutions.

Zuolong Wei

Ph.d.-kandidat

Når en bil frontkolliderer, oppstår det en bølgeeffekt når støtfanger, kollisjonssoner og stålbjelker krøller seg sammen. Samtidig fortsetter kupéen framover.

Zuolong Wei har studert hvordan energien oppfører seg i frontkollisjoner, og har brukt matematisk modellering i forskningen.

Zuolong Wei disputerer for ph.d.-graden onsdag 19. april 2017 med avhandlingen Analysis, Modeling and CAE Validation of Vehicle Crashes using Advanced Signal Processing Tools. Han har fulgt doktorgradsprogrammet ved Fakultet for teknologi og realfag med spesialisering i mekatronikk.

Slik beskriver kandidaten selv essensen i avhandlingen:

Analysis, Modeling and CAE Validation of Vehicle Crashes using Advanced Signal Processing Tools

Automobiles offer great benefits to both the whole society and people's daily life. In automobile industry, safety keeps the first concern of engineers. Although many safety features are involved in vehicles, the crashworthiness, which is the ability of a structure to protect its occupants during an impact, plays the basic role in vehicle safety area.

Relationship between the crashworthiness structures and crash pulses

Generally, the crashworthiness structure design presets a crumple zone, which contains a set of energy absorbing components, such as bumper, crash-boxes and longitudinal beams. They are elaborately designed to assuage the impacts.

In the crashes, these components will deform in specified mode and duration. Consequently, the accelerations of vehicle cabin (i.e. crash pulses) have various features in different stages of crash processes.

This work focused on the relationship between the crashworthiness structures and crash pulses and gave mathematical solutions in following three aspects:

Three aspect of crash tests

Firstly, this work introduced a modelling scheme, which uses a piecewise model to represent a car’s crash pulse in NCAP 56 km/h frontal crash test. The segments in this model are clearly corresponded to each energy absorbing components in vehicle frontal structures. Moreover, the proposed piecewise model can be used to estimate the crash pulses of other frontal crashes in different impact velocities.

Secondly, this work proposed a method to identify the components’ deformation durations with the time-frequency analysis of crash pulses. The proposed method enable engineers to investigate the crashworthiness performance of each energy absorbing components from the measured acceleration signals in crash tests.

Finally, this work offered a comparison scheme for vehicle crash pulses. This scheme can make a more comprehensive validation for the Finite Element models of a vehicle by comparing its crash signals from crash tests and simulations.

Disputasfakta:

Kandidaten: Zuolong Wei received the B.S. and M.S. degrees in control science and engineering from Harbin Institute of Technology, Harbin, China, in 2010 and 2012, respectively. He started the PhD program in Mechatronics at University of Agder in 2013. His research interests include system modeling, signal processing, control theory and CAE simulation, especially in vehicle safety area.

Prøveforelesning og disputas finner sted i Rom C2 040, Campus Grimstad.

Dekan Michael Rygaard Hansen leder disputasen.

Tid for prøveforelesning: Onsdag 19. april 2017 kl 10:00

Oppgitt emne for prøveforelesning: «Environmental impact and vehicle safety. Can you have it all?”

Tid for disputas:Onsdag 19. april 2017 kl 12:00

Tittel på avhandling: “Analysis, Modeling and CAE Validation of Vehicle Crashes using Advanced Signal Processing Tools”

Søk etter avhandlingen i AURA - Agder University Research Archive, som er et digitalt arkiv for vitenskapelige artikler, avhandlinger og masteroppgaver fra ansatte og studenter ved Universitetet i Agder. AURA blir jevnlig oppdatert.

Opponenter:

Førsteopponent: Førsteamanuensis Bjørn Haugen, NTNU

Annenopponent:Førsteamanuensis Dario Vangi, Universitetet i Firenze

Bedømmelseskomitéen er ledet av førsteamanuensis Rune Strandberg, UiA.

Veileder i doktorgradsarbeidet var professor Kjell Gunnar Robbersmyr, UiA (hovedveileder).