ANALYSIS OF COMPLEX DRIVETRAINS USING …€¦ · · 2011-05-24ANALYSIS OF COMPLEX DRIVETRAINS...
Transcript of ANALYSIS OF COMPLEX DRIVETRAINS USING …€¦ · · 2011-05-24ANALYSIS OF COMPLEX DRIVETRAINS...
Salzburg, 18 May 2011
Prof. Dr.-Ing. Berthold Schlecht - Dipl.-Ing. Thomas Rosenlöcher - Dipl.-Ing. Thomas SchulzeDipl.-Ing. Samer Mtauweg - Dipl.-Ing. Carsten Schulz - Dipl.-Ing. Lutz Reichel
SIMPACK User Meeting 2011
ANALYSIS OF COMPLEX DRIVETRAINS USING SIMPACK- A WIDE RANGE OF APPLICATIONS -
ANALYSIS OF COMPLEX DRIVETRAINS USING SIMPACK- A WIDE RANGE OF APPLICATIONS -
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Institut für Maschinenelemente und Maschinenkonstruktion
Prof. Dr.-Ing. Berthold Schlecht
Introduction
Technische Universität Dresden – Chair of Machine Elements
Field of research: drive technology, especially gear technologyand components
load-carrying-
capacity of gearings
software for
simulationof drive systems
and calculationof machine elements
machine diagnostics
and operational measure-
ments
calculation procedures
and develop-ment of
standards, guidelines
dynamic analysis of
electro-mechanical
drive systems
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Institut für Maschinenelemente und Maschinenkonstruktion
Prof. Dr.-Ing. Berthold Schlecht
Introduction
Dynamic analysis of electro-mechanical drive systems
Improvement and verification of simulation techniques
Investigations in the time and frequency domain using the MBS and FEM
Analyses of drive train systems and drive train concepts
Verification of simulation models by measurement results
2001 2002 2003 2004 2005
approx. 0.7 MW approx. 1.5 MW approx. 2.0 MW
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Institut für Maschinenelemente und Maschinenkonstruktion
Prof. Dr.-Ing. Berthold Schlecht
Modeling of wind turbines – components and loads
rotor gear box housing / structure
wind bearings generator / grid
shafts / gearings
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Institut für Maschinenelemente und Maschinenkonstruktion
Prof. Dr.-Ing. Berthold Schlecht
Modeling of wind turbines – drive train
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Institut für Maschinenelemente und Maschinenkonstruktion
Prof. Dr.-Ing. Berthold Schlecht
Modeling of wind turbines – structure
Influences of the main frame design on the dynamic behavior of the drive train
Influences of the gear box support concept: three or four point support
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Institut für Maschinenelemente und Maschinenkonstruktion
Prof. Dr.-Ing. Berthold Schlecht
Modeling of wind turbines – resultsCampbell-diagram
0
20
40
60
80
100
120
140
0 500 1000 1500
speed [rpm]
freq
uenc
y [H
z] 1p - rotor
3p - rotor
6p - rotor
St3
St2
St1
3.0 Hz
23.0 Hz
40.5 Hz
127.0 Hz
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Institut für Maschinenelemente und Maschinenkonstruktion
Prof. Dr.-Ing. Berthold Schlecht
Modeling of wind turbines – results
Emergency stop of a wind turbine
Disconnecting the generator, pitching of the blades, braking
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Institut für Maschinenelemente und Maschinenkonstruktion
Prof. Dr.-Ing. Berthold Schlecht
Modeling of pitch and azimuth drives
Azimuth drivePitch drive
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Institut für Maschinenelemente und Maschinenkonstruktion
Prof. Dr.-Ing. Berthold Schlecht
Further areas of application
Compressor
Longwall shearerAircraft engine…Mechanical watchBucket wheel excavator
ThrusterLadle crane
BogieRolling mills
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Institut für Maschinenelemente und Maschinenkonstruktion
Prof. Dr.-Ing. Berthold Schlecht
Simulation of a mechanical watch
Analysis of the running behavior – due to the small dimensions no comprehensive measurements are possible
Clockwork: not constant ratio, permanent acceleration of all components
Determination of the dynamic behavior of the system and the influences on the running accuracy
Comparison of results with torque measurements, theoretical approaches, optimization of the gearing
mainspring
minute wheel
second wheel
anchor wheel
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Institut für Maschinenelemente und Maschinenkonstruktion
Prof. Dr.-Ing. Berthold Schlecht
Simulation of a mechanical watch
Nonlinear input torque of the main spring
Stepwise output torque caused by the anchor wheel
Detailed modeling of the nonlinear gearing characteristic (pressure angle, ratio not constant during one meshing)
main spring – minute wheel second wheel – anchor wheel
wheel angle [°] wheel angle [°]
ratio
[-]
ratio
[-]
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Institut für Maschinenelemente und Maschinenkonstruktion
Prof. Dr.-Ing. Berthold Schlecht
Simulation of a mechanical watch
Analysis of the influence of each gear stage on the resulting output torque
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Institut für Maschinenelemente und Maschinenkonstruktion
Prof. Dr.-Ing. Berthold Schlecht
Simulation of a bucket wheel excavator
Analysis of the drive train and the supporting structure of a bucket wheel excavator
Changing operating conditions (hard layers of overburden) – prevention of damages (drive train, structure)
Increase of life time by load reducing operation and control strategy
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Institut für Maschinenelemente und Maschinenkonstruktion
Prof. Dr.-Ing. Berthold Schlecht
Simulation of a bucket wheel excavator
Detailed simulation model of the drive train
Modeling the motor and the controller
Development of a theoretical digging force model
Additionally using measurement results to determine realistic forces acting at the bucket wheel
Consideration of the structure of the excavator (boom) by beam approaches/finite element models
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Institut für Maschinenelemente und Maschinenkonstruktion
Prof. Dr.-Ing. Berthold Schlecht
Simulation of a bucket wheel excavator
Modeling the digging forces
Theoretical approach considers the properties of the overburden and displacements of the boom
Comparison with a measurement based model for the digging forces
speed – electric motor
torque – bucket wheel
torque – electric motor
speed – bucket wheel
speed – electric motor
torque – bucket wheel
PID control
actual nominal
+ -
actual nominal
+ -
PID control
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Institut für Maschinenelemente und Maschinenkonstruktion
Prof. Dr.-Ing. Berthold Schlecht
Simulation of a bucket wheel excavator
Intended results
Determination of critical operating conditions (resonances)
Analysis of the acting forces/torques for each drive train component
Simulation of different load cases to determine design loads, development of a load reducing control strategy
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Institut für Maschinenelemente und Maschinenkonstruktion
Prof. Dr.-Ing. Berthold Schlecht
Thank You for Your Attention
Technische Universität Dresden
Department of Mechanical Engineering
Institute of Machine Elements and
Machine Design
Chair of Machine Elements
Münchner Platz 3
D-01062 Dresden