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Dynamic Simulation of a One-Cylinder Engine Test Rig
KTH, School of Engineering Sciences (SCI), Solid Mechanics (Dept.).
2017 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

An engine test rig at AVL was redesigned with new components after a

failure. The new system consists of a torsional vibration damper, a cardan

axle, a torque flange, and an adapter unit, together with a new dynamometer.

To ensure another failure would not occur a study of the new system

was conducted.

A general methodology for simulating the behaviour of a test rig powertrain

was developed using AVL Excite Designer and applied to the redesigned

system. The simulated results were then used to evaluate the new components

for durability. The loads obtained from AVL Excite were used for load

based analysis, and used as boundary conditions in finite element models in

Abaqus of components where load analysis was not sufficient.

Based on the results it was recommended that continuous operation at high

loads in the RPM range below ⇡1650 is to be avoided to reduce the following

risks:

• Overloading of the torsional vibration damper, which will result in

excessive wear of the unit shortening its life-span.

• Overloading of the torque flange, which can result in risk of fatigue

failure.

These results were e↵ects of an issue with excitation of a half-mode of the

systems eigenfrequency,

Possible alterations to shift the eigenfrequency of the system, and reduce the

above described issues, are increasing torsional compliance and/or increasing

the rotational inertia of certain components.

Place, publisher, year, edition, pages
2017. , 62 p.
National Category
Applied Mechanics
Identifiers
URN: urn:nbn:se:kth:diva-204952OAI: oai:DiVA.org:kth-204952DiVA: diva2:1087218
Subject / course
Solid Mechanics
Supervisors
Examiners
Available from: 2017-04-06 Created: 2017-04-06 Last updated: 2017-04-06Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
  • ieee
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  • de-DE
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