@misc{WehbiBestleBeilharz, author = {Wehbi, Kassem and Bestle, Dieter and Beilharz, J{\"o}rg}, title = {Automatic Calibration Process for Optimal Control of Clutch Engagement during Launch}, series = {Mechanics Based Design of Structures and Machines}, volume = {45}, journal = {Mechanics Based Design of Structures and Machines}, number = {4}, issn = {1539-7742}, doi = {10.1080/15397734.2016.1250221}, pages = {507 -- 522}, language = {en} } @misc{AbbasZhouBestleetal., author = {Abbas, Laith K. and Zhou, Qinbo and Bestle, Dieter and Rui, Xiaoting}, title = {A Unified Approach for Treating Multibody Systems Involving Flexible Beams}, series = {Mechanism and Machine Theory}, volume = {107}, journal = {Mechanism and Machine Theory}, issn = {0094-114X}, doi = {10.1016/j.mechmachtheory.2016.09.022}, pages = {197 -- 209}, language = {en} } @inproceedings{HartwigBestle, author = {Hartwig, Lennard and Bestle, Dieter}, title = {Compressor Blade Design for Stationary Gas Turbines Using Dimension Reduced Surrogate Modeling}, series = {IEEE Congress on Evolutionary Computation, 5.-8.6.2017, Donostia/San Sebasti{\´a}n, Spain}, booktitle = {IEEE Congress on Evolutionary Computation, 5.-8.6.2017, Donostia/San Sebasti{\´a}n, Spain}, publisher = {IEEE}, address = {Piscataway, NJ}, isbn = {978-1-5090-4601-0}, doi = {10.1109/CEC.2017.7969493}, pages = {1595 -- 1602}, language = {en} } @inproceedings{HendlerExtraLockanetal., author = {Hendler, Marco and Extra, Simon and Lockan, Michael and Bestle, Dieter and Flassig, Peter Michael}, title = {Compressor Design in the Context of Holistic Aero Engine Design}, series = {2017 AIAA Aviation Forum, Denver, AIAA-2017-3334, 2017}, booktitle = {2017 AIAA Aviation Forum, Denver, AIAA-2017-3334, 2017}, doi = {10.2514/6.2017-3334}, language = {en} } @inproceedings{LockanBestleJankeetal., author = {Lockan, Michael and Bestle, Dieter and Janke, Christian and Meyer, Marcus}, title = {Optimization of Coupled System Components Using Approximations of Interface Quantities}, series = {ASME Turbo Expo 2017, Turbomachinery Conference and Exposition, Volume 2C, Turbomachinery Charlotte, North Carolina, USA, June 26-30, 2017}, booktitle = {ASME Turbo Expo 2017, Turbomachinery Conference and Exposition, Volume 2C, Turbomachinery Charlotte, North Carolina, USA, June 26-30, 2017}, publisher = {ASME}, address = {New York, NY}, isbn = {978-0-7918-5080-0}, doi = {10.1115/GT2017-64135}, pages = {11}, language = {en} } @misc{MartinBestle, author = {Martin, Ivo and Bestle, Dieter}, title = {Automated eigenmode classification for airfoils in the presence of fixation uncertainties}, series = {Engineering Applications of Artificial Intelligence}, volume = {67}, journal = {Engineering Applications of Artificial Intelligence}, issn = {0952-1976}, doi = {https://doi.org/10.1016/j.engappai.2017.09.022}, pages = {187 -- 196}, abstract = {Abstract Automated structural design optimization should take into acc ount risk of failure which depends on eigenmodes, since eigenmode shap es determine failure risk by their characteristic stress concentration pattern, as well as by their specific interaction with excitations. T hus, such a process needs to be able to identify eigenmodes with low e rror rate. This is a rather challenging task, because eigenmodes depen d on the geometry of the structure which is changing during the design process, and on boundary conditions which are not clearly defined due to uncertainties in the assembly and running conditions. The present investigation aims to find a proper classification method for eigenmod es of compressor airfoils. Specific data normalization and data depend ent initialization of a neural network using principle-component direc tions as initial weight vectors have led to the development of a class ification and decision procedure enabling automatic assignment of prop er uncertainty bands to eigenfrequencies of a specific eigenmode shape . Application to compressor airfoils of a stationary gas-turbine with hammer-foot and dove-tail roots demonstrates the high performance of t he proposed procedure.}, language = {en} } @misc{HofmannBrennerBestle, author = {Hofmann, Timo and Brenner, Tobias and Bestle, Dieter}, title = {Investigation of the Disc Deflection Behavior of Shim Valves in Vehicle Shock Absorbers}, series = {SAE technical papers}, journal = {SAE technical papers}, number = {2018-01-0701}, issn = {0148-7191}, pages = {11}, language = {en} } @inproceedings{WehbiWurmBestleetal., author = {Wehbi, Kassem and Wurm, Andreas and Bestle, Dieter and Beilharz, J{\"o}rg}, title = {Automated Calibration Using Simulation and Robust Design Optimization Improving Shift and Launch Quality of Automatic Transmissions}, series = {Automotive data analytics, methods, DoE, proceedings of the International Calibration Conference}, booktitle = {Automotive data analytics, methods, DoE, proceedings of the International Calibration Conference}, editor = {R{\"o}pke, Karsten and G{\"u}hmann, Clemens}, publisher = {Expert Verlag}, address = {Renningen}, isbn = {978-3-8169-3381-6}, pages = {18 -- 33}, language = {en} } @techreport{BestleLockanHartwigetal., author = {Bestle, Dieter and Lockan, Michael and Hartwig, Lennard and Martin, Ivo}, title = {Q3D Optimierung vielstufiger Verdichter in der Vorauslegung und robuste multidisziplin{\"a}re Schaufelauslegung}, publisher = {Brandenburgische Technische Universit{\"a}t Cottbus-Senftenberg, IKMZ-Universit{\"a}tsbibliothek}, address = {Cottbus ; Senftenberg}, isbn = {978-3-940471-30-7}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:co1-opus4-42225}, pages = {33}, language = {de} } @misc{BrennerHofmannRiegeretal., author = {Brenner, Tobias and Hofmann, Timo and Rieger, Karl-Josef and Bestle, Dieter}, title = {Untersuchung des Ger{\"a}uschverhaltens von Kraftfahrzeug-Schwingungsd{\"a}mpfern und Elastomerlagern}, series = {16. Internationale VDI-Tagung Reifen-Fahrwerk-Fahrbahn 2017}, journal = {16. Internationale VDI-Tagung Reifen-Fahrwerk-Fahrbahn 2017}, publisher = {VDI Verlag}, address = {D{\"u}sseldorf}, isbn = {978-3-18-092296-6}, pages = {187 -- 198}, language = {de} } @inproceedings{HendlerBestleFlassig, author = {Hendler, Marco and Bestle, Dieter and Flassig, Peter Michael}, title = {Cloning Strategy for Aerodynamic Compressor Design based on Throughflow Analysis}, series = {Proceedings of Montreal 2018, Global Power and Propulsion Forum, 7-9.05.2018}, booktitle = {Proceedings of Montreal 2018, Global Power and Propulsion Forum, 7-9.05.2018}, pages = {8}, abstract = {Due to their high complexity, aero engine development is a time-consuming and cost-intensive process. Therefore, pre-developed proven aerodynamic and geometric compressor information is often used as starting point and transferred to new compressor designs. In the present paper, a new approach for aerodynamic cloning of an already existing compressor flow to a new compressor geometry by use of a streamline curvature based Throughflow solver is presented. Parameterized compressor quantities are automatically modified with the help of optimization strategies, and the resulting compressor aerodynamics are compared to a reference design in each iteration step. The target is to minimize the discrepancy between reference design and new design regarding essential flow parameters like de Haller number, Mach number etc., and thereby to reproduce the aerodynamic image of the reference design. Thus, already collected experience from existing compressor flow fields can be used to reduce costs for developing as well as testing of new compressor configurations. Conducted investigations show a notable acceleration of the design process in comparison to former strategies starting from scratch while achieving an acceptable compliance of aerodynamic parameters.}, language = {en} } @inproceedings{ExtraLockanBestleetal., author = {Extra, Simon and Lockan, Michael and Bestle, Dieter and Flassig, Peter Michael}, title = {A Comparison of Strategies for Efficient Core Engine Optimization with Coupled Subsystems}, series = {Proceedings of Montreal 2018, Global Power and Propulsion Forum, 7-9.05.2018}, booktitle = {Proceedings of Montreal 2018, Global Power and Propulsion Forum, 7-9.05.2018}, pages = {8}, abstract = {The present paper compares four different optimization strategies for decoupled optimization in the context of preliminary core engine design for aero engines. An optimization with the AAO (All-At-Once) approach is performed as a baseline and compared against the performance and results of three cascaded optimization strategies: CO (Collaborative Optimization), BLISS 2000 (Bi-Level Integrated System Synthesis) and ISOC (Interface Segmentation Optimization Concept). The optimization problem is based on a thermodynamic core engine model representing an industrial application example. The results are assessed with respect to typical requirements for multidisciplinary core engine design. The impact of the used optimization strategy on the performance of the optimization concept is investigated and discussed.}, language = {en} } @inproceedings{UrbanoGolowinLoehnertetal., author = {Urbano, Jose and Golowin, Andrej and L{\"o}hnert, Stefan and Bestle, Dieter}, title = {Mechanical Integrity of Steel Discs with Corrosion Pits}, series = {12th International Fatigue Congress (FATIGUE 2018), Poitiers Futuroscope, France, May 27-June 1st, 2018}, booktitle = {12th International Fatigue Congress (FATIGUE 2018), Poitiers Futuroscope, France, May 27-June 1st, 2018}, publisher = {EDP Sciences}, address = {Les Ulis}, doi = {10.1051/matecconf/201816504012}, pages = {8}, abstract = {Currently, prediction of crack initiation by corrosion pits is only possible by assuming regular geometrical shapes, such as semi-spheres or semi-ellipsoids. Moreover, typical fatigue life diagrams associate the crack initiation life with geometrical features, such as pit depth or aspect ratio, often leading to unsatisfactory correlations due to high pit shape variability and data scatter. In the context of blade-disc fixation in aero engine turbines, this limitation translates into highly conservative life estimations. Therefore, a new crack initiation predictor is formulated based on experimental testing and numerical analysis of 28 artificial corrosion pits. A low-cycle fatigue test campaign is conducted using three-point bending test specimens to simulate maximum takeoff operation conditions of the aero engine and the associated loading of the blade root designed as firtree. An artificial pit is located at the critical point of each test specimen, respectively. The prediction criterion is based on finite element analysis and is formulated as the lowest plastic strain of a plastic region with a certain volume in the corrosion pit. This reference volume is varied until an optimum correlation with experimental crack initiation life is obtained. The criterion shows a superior correlation with crack initiation life compared to pure geometrical parameters such as pit depth.}, language = {en} } @inproceedings{ExtraLockanBestleetal., author = {Extra, Simon and Lockan, Michael and Bestle, Dieter and Flassig, Peter Michael}, title = {Coupled Subsystem Optimization for Preliminary Core Engine Design}, series = {Evolutionary and deterministic methods for design optimization and control with applications to industrial and societal problems, Sep. 13-15, 2017 in Madrid, Spain, EUROGEN 2017, Book of abstracts}, booktitle = {Evolutionary and deterministic methods for design optimization and control with applications to industrial and societal problems, Sep. 13-15, 2017 in Madrid, Spain, EUROGEN 2017, Book of abstracts}, publisher = {Technical University}, address = {Madrid}, isbn = {978-84-697-5112-1}, language = {en} } @inproceedings{ChaoBestleKruegeretal., author = {Chao, Chen-Xiang and Bestle, Dieter and Kr{\"u}ger, D. and Meissner, Bernd}, title = {Increasing the tooth root capacity of symmetric and asymmetric gears by optimizing the tooth root fillet shape}, series = {International Gear Conference 2018, Lyon, 27.-29.08.2018, vol. 1}, booktitle = {International Gear Conference 2018, Lyon, 27.-29.08.2018, vol. 1}, publisher = {Chartridge Books Oxford}, address = {Oxford}, isbn = {978-1-911033-42-4}, pages = {531 -- 541}, abstract = {The international standard ISO 6336-3 defines a calculation method for the tooth root capacity of standard gears with basic rack profile according to ISO 53. However, the results of this method may become too optimistic for non-standard gears with custom root fillets, large pressure angles or asymmetric teeth, since the effect of general mean stresses on the local tooth root strength are neglected. Therefore, a more generic calculation method is suggested, which considers the mean stress influence by utilizing the Haigh diagram. Both approaches are then used as basis of root fillet shape optimizations. A comparison of results demonstrates significant differences in the safety assessment and the resulting root geometry.}, language = {en} } @inproceedings{BrennerHofmannHupfeldetal., author = {Brenner, Tobias and Hofmann, Timo and Hupfeld, J. and Bestle, Dieter}, title = {Process for Early Prediction of Noise Induced by Damper Struts}, series = {18. Internationales Stuttgarter Symposium : Automobil- und Motorentechnik}, booktitle = {18. Internationales Stuttgarter Symposium : Automobil- und Motorentechnik}, editor = {Bargende, Michael and Reuss, Hans-Christian and Wiedemann, Jochen}, publisher = {Springer Fachmedien}, address = {Wiesbaden}, isbn = {978-3-658-21193-6}, doi = {10.1007/978-3-658-21194-3_54}, pages = {699 -- 713}, language = {en} } @inproceedings{HofmannBrennerHupfeldetal., author = {Hofmann, Timo and Brenner, Tobias and Hupfeld, J. and Bestle, Dieter}, title = {Generation of Optimal Shim Stacks for Valves in Automotive Dampers}, series = {18. Internationales Stuttgarter Symposium : Automobil- und Motorentechnik}, booktitle = {18. Internationales Stuttgarter Symposium : Automobil- und Motorentechnik}, editor = {Bargende, Michael and Reuss, Hans-Christian and Wiedemann, Jochen}, publisher = {Springer Fachmedien}, address = {Wiesbaden}, isbn = {978-3-658-21193-6}, doi = {10.1007/978-3-658-21194-3_56}, pages = {729 -- 743}, language = {en} } @misc{HendlerBestleFlassig, author = {Hendler, Marco and Bestle, Dieter and Flassig, Peter Michael}, title = {Component-specific Engine Design Taking into Account Holistic Design Aspects}, series = {International Journal of Turbomachinery, Propulsion and Power}, volume = {3}, journal = {International Journal of Turbomachinery, Propulsion and Power}, number = {2}, issn = {2504-186X}, doi = {10.3390/ijtpp3020012}, pages = {1 -- 16}, language = {en} } @misc{IvanovBestleJanke, author = {Ivanov, Dmitrij and Bestle, Dieter and Janke, Christian}, title = {A Response Surface Based Strategy for Accelerated Compressor Map Computation}, series = {Evolutionary and deterministic methods for design optimization and control with applications to industrial and societal problems, Sep. 13-15, 2017 in Madrid, Spain, EUROGEN 2017, Book of abstracts}, journal = {Evolutionary and deterministic methods for design optimization and control with applications to industrial and societal problems, Sep. 13-15, 2017 in Madrid, Spain, EUROGEN 2017, Book of abstracts}, publisher = {Technical University}, address = {Madrid}, isbn = {978-84-697-5112-1}, language = {en} } @inproceedings{IvanovBestleJanke, author = {Ivanov, Dmitrij and Bestle, Dieter and Janke, Christian}, title = {A Response Surface Based Strategy for Accelerated Compressor Map Computation}, series = {Evolutionary and Deterministic Methods for Design Optimization and Control With Applications to Industrial and Societal Problems}, booktitle = {Evolutionary and Deterministic Methods for Design Optimization and Control With Applications to Industrial and Societal Problems}, editor = {Andr{\`e}s-P{\`e}rez, Esther and Gonz{\´a}lez, Leo M. and Periaux, Jacques and Gauger, Nicolas R. and Quagliarella, Domenico and Giannakoglou, Kyriakos C.}, publisher = {Springer International Publishing}, address = {Cham}, isbn = {978-3-319-89889-6}, doi = {10.1007/978-3-319-89890-2_14}, pages = {211 -- 226}, language = {en} }