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Nikola Aulig - Generic Topology Optimization Based on Local State Features

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Nikola Aulig

Generic Topology Optimization Based on Local State Features

Reihe: Rechnerunterstützte Verfahren

Band 468 2017

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Introduction S. 1-7

„… topology optimization algorithms are so-called gradient-based algorithms. When using mathematical gradients …” „… the holes”. In conventional topology optimization algorithms, the knowledge causing the formation of …” „… Computational Intelligence, for instance, evolutionary algorithms for optimization, or artificial neural …”

Bibliography S. 177-202

„… solid geometry based topology optimization using evolutionary algorithm. In Bansal, J. C., Singh, P. K …” „… . Performance evaluation of a two stage adaptive genetic algorithm (TSAGA) in structural topology optimization …” „… geometric variables for topology optimization using genetic algorithm. Structural and Multidisciplinary …”

Fundamentals S. 8-28

„… optimization algorithms, Sec. 2.3 introduces the field of evolutionary computation, which provides more general …” „… topology optimization algorithm can be illustrated as in Fig. 2.4. The algorithm starts with an initial …” „… Matlab implementation of this topology optimization algorithm, including educational code, is available …”

Structure Representations for Evolutionary Computation S. 29-47

„… applications was the optimization of the compliance problem using a genetic algorithm. Thereby, every element …” „… aspect of any application of an evolutionary optimization algorithm is the parameterization of the …” „… algorithm and a constraint handling evolutionary algorithm have been applied for optimization [187, 188 …”

Topology Optimization by Predicting Sensitivities S. 48-83

„… of a parameterized structure. The enclosing topology optimization algorithm is described in Sec. 4.2 …” „… algorithm to a topology optimization problem by specific operators or by combining it with heuristics in …” „… optimization algorithm compared to that of a generic topology optimization algorithm. In the classical approach …”

Conclusions S. 150-154

„… structures [182, 183]. Interestingly, also classical topology optimization algorithms show aspects of a …” „… these topology optimization algorithms are performed based on a mathematical perspective, instead of a …” „… derivatives are a prerequisite. In contrast, the optimization progress of evolutionary algorithms is guided by …”

Topology Optimization of Crashworthiness Objectives S. 121-149

„… optimization parameters can be addressed with global search algorithms [57]. However, the field of …” „… interface was developed to couple the optimization algorithm to the commercial solver [13]. It provides …” „… 121 6 Topology Optimization of Crashworthiness Objectives Within the automotive industry, the task …”

Titelei/Inhaltsverzeichnis

„… learning, this dissertation explores a novel generic topology optimization algorithm, which is able to …” „… Reihe 20 Generic Topology Optimization Based on Local State Features Berichte aus dem Institut für …” „… Automatisierungstechnik und Mechatronik der TU Darmstadt Generic Topology Optimization Based on Local State Features …”

Studies on the Minimum Compliance Problem S. 84-120

„… topology optimization algorithm, the TOPS approach requires validation on a reference problem. A standard …” „… LSFs. Biologically-inspired or intuition-based topology optimization algorithms that utilize the strain …” „… optimization method and presents comprehensive results. Primarily, Topology Optimization by Predicting …”

doi.org/10.51202/9783186468208

VDI Wissensforum GmbH - International Conference on Gears 2017

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VDI Wissensforum GmbH (Hrsg.)

International Conference on Gears 2017

Reihe: VDI-Berichte

Band 2294 2017

Treffer in den folgenden Teilen:

I. Atanasovska, H. Abderazek Comparative analysis of few new procedures for spur gears tooth profile optimization with different methods and aspects S. 1169-1176

„… algorithm with a brief description of the developed optimization procedure. The FEA calculations give the …” „… optimization - EPM VDI-Berichte Nr. 2294, 2017 1171 4. New evolutionary optimization algorithm for spur gears …” „… - EOA The new evolutionary optimization algorithm for spur gears performs optimization with aspects of …”

P. Garambois, E. Rigaud, J. Perret-Liaudet Robust optimization of gear macro and micro-geometries in order to minimize static transmission error and gear stiffness fluctuations S. 927-938

„… process. The optimization is performed using a genetic algorithm that tests a lot of different gears. The …” „… meshing process. The optimization is carried out by a genetic algorithm named NSGA-II. It is based on the …” „… optimization problem and the used genetic algorithm are depicted, and an example illustrates the methodology …”

B. Schlecht, T. Schulze, K. Riedel Tooth contact analysis under load on double helical-geared planetary gearboxes S. 83-96

„… . 2294, 2017 93 6. Optimization The present research project describes the algorithm to determine …” „… with its two tooth contacts. The calculation algorithm of the planet gear tilt and resulting bearing …” „… computer-aided algorithm allows multiple calculations in a short period that can be used to improve the design …”

S. Stoyanov, V. Dobrev, A. Dobreva Investigating dynamic behavior of planetary gear trains through the systematic approach S. 197-208

„… carries out an optimization of planetary gear trains for vehicles based upon computer aided frequency …” „… software product Abaqus/Explicit provides two algorithms for modelling contact interactions: general …” „… contact algorithm and contact pair algorithm, [1]. The general contact algorithm allows simple contact …”

A. Carbonelli, J.-Y. Guerder Computing and minimizing the whining noise – Application to a bogie gearbox S. 517-526

„… deflection can be inserted into the optimization algorithm in order to anticipate it. 5. Conclusion The …” „… modifications in order to reduce the radiated noise. The optimization of tooth modifications in simple mesh …” „… powerful resolution algorithm in frequency domain to solve the dynamic equations with an iterative …”

C. Brecher, C. Löpenhaus, J. Brimmers Potential of free flank modifications for beveloid gears S. 553-564

„… optimization algorithm. The iterative optimization is stopped once an optimal flank topography is found. In or …” „… Optimization algorithm Determination of target valueSpecification of modifications f(r,z) = a10·r + a20·r …” „… gears regarding the operational behavior. After a brief overview on existing geometry optimization …”

A. L. Kapelevich, Y. V. Shekhtman Root fillet optimization of thin rim planet gears with asymmetric teeth S. 741-750

„… Root Fillet Optimization of Thin Rim Planet Gears with Asymmetric Teeth Dr. Alex L. Kapelevich …” „… optimization by means of Direct Gear Design provides the ultimate bending stress minimization. Previous …” „… publications [1, 3] had described the tooth root fillet optimization assuming that both mating gears have a …”

J. Yu, L. Yao, C. Ren, X. Yan, L. Lin Design and experimental validation on a novel tow speed transmission for electric bus S. 97-108

„… . Here, the Multi-Island Genetic Algorithm (MIGA) is used for solving the multi-objective optimization …” „… principle and ratios optimization for the SDAT system 2.1 The structure of the proposed SDAT system As …” „… transient gear ratio during the gear shifting process. 2.3 The gear ratios optimization for the SDAT …”

E. Erkilic, Z. Burcay Optimizing tooth proportions to improve topland Saribay balance in aerospace bevel gears S. 447-456

„… corners on tooth flanks after case hardening. While many studies are present on optimization of gear …” „… topland unbalance by using the proposed optimization procedure. 1. Introduction Literature Review and …” „… has been pub- VDI-Berichte Nr. 2294, 2017 447 lished to attempt optimization of tooth contact and …”

Z. Roth, J. Opferkuch High load capacity gear root fillet contour with a bézier curve S. 719-732

„… gear root safety. Due to the multitude of combinations the optimization occurs with the help of an …” „… in-house software program, which is iteratively based upon the Finite Element Method. The optimization of …” „… the parameters can be achieved with a heuristic algorithm. This method is largely preferred in …”

T. Nagumo, M. Ishizuka, Y. Satou, S. Matsumura, H. Houjoh Estimation of loaded static transmission error using vibration measurement under operating conditions in a two-stage helical gear reducer S. 857-868

„… of stiffness of gears, bearings, etc. and damping evaluated by parameter optimization using …” „… real-coded genetic algorithm (RCGA) [6]. (2-c) FRF combining: FRF in a wide frequency range is derived by …” „… vibration measurement result. By repeating this process using an optimization method, the relative tooth …”

Y. Shen, S. Rinderknecht, M. Hoppert General modelling method of power losses in transmission with parameter identification S. 905-916

„… identification method and algorithm. On the one hand, a much better proximity is achieved. On the other hand …” „… , the identified parameters indicate the optimization potential of the component losses for …” „… (electric motor). But the optimization of efficiency is also necessary for all other components in the …”

F. Concli, C. Gorla Numerical modeling of the churning power losses of gears: an innovative 3D computational tool suitable for planetary gearbox simulation S. 881-892

„… and the optimization of the power losses of gears [14-20]. Numerical simulations remove the …” „… . Traditionally the general purpose software integrate a local remeshing algorithm that substitute the …” „… ]. While the fluid dynamic solver was already available, the algorithm for the boundary motion, the …”

W. Wang, L. Han, Q. Yan, C. Xiang, Y. Li Research on the dynamic power split characteristics and the electric power coordinated control for a hybrid transmission system S. 131-142

„… base of the scheme selecting, parameter matching and the power distribution and optimization. For …” „… optimization, the speed and the split power characteristics of the researched two-mode EVT is proposed first …” „… supply control algorithm. The fuzzy PID is used to achieve the coordinated power supply control. The …”

J. Reißmann, E. Leidich Computation of the tooth root strength of Worm Wheels with a calculation program based on local stresses S. 373-394

„… are analytical calculation algorithms to consider wear, pitting and fracture. The german standard DIN …” „… 3996 [1] is based on shear stresses. Another algorithm [2] is based on von-Mises equivalent stresses …” „… algorithm of the computation program to determine the tooth root strength of worm wheels The program …”

Y. Wang, B. Peng, G. Liu, L. Liu Design of transmission accuracy of the involute cylindrical gear-worm gear system under large temperature difference based on FE method S. 491-502

„… of Technology, 2013. [6] Padmanabhan, S.: Gear pair design optimization by genetic algorithm and FEA …”

A. Lohrengel, M. Heß Thrust cone bearings provide increased efficiency for helical gear units at moderate speed levels – Indications for possible energy saving potential in an expanded field of application S. 231-242

„… parameters on the film thickness, a hydrodynamic fluid film simulation was developed. The algorithm …” „… lubrication an optimization problem results for the design engineer which might be solved by numerical …”

doi.org/10.51202/9783181022948

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Bauingenieur

Alle Ausgaben: Bauingenieur

Bauingenieur Jahrgang 92 (2017) Heft 10 ISSN Online: 0005-6650

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Rimantas Belevicius, Algirdas Juozapaitis, Dainius Rusakevicius, Ieva Misiunaite, Saulius Valentinavicius Optimal Schemes of Underslung Girder Foot Bridges for Different Spans and Deck Types S. 427-434

„… varies depending on the number of sections chosen by the optimization algorithm and may reach 57 for a …” „… actually multimodal character of the problem. Stochastic evolutionary optimization algorithms (EA) that …” „… do not require the sensitivity information were used for optimization. Stochastic algorithms do not …”

doi.org/10.37544/0005-6650-2017-10

Jeanette Hamiga - Increasing Output in Transfer Lines through Adaptive Buffer Operation

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Jeanette Hamiga

Increasing Output in Transfer Lines through Adaptive Buffer Operation

Reihe: Fördertechnik/Logistik

Band 58 2016

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Method design for increased output in assembly S. 39-63

„… during a shift. Optimization Single and Multi-objective Optimization: Evolutionary Algorithm …” „… optimization concept is presented. Concluding the search methodology, the Evolutionary Algorithms used, are …” „… Evolutionary Algorithms used for search of solutions As the variables in the proposed optimization task are …”

References S. 118-132

„… Approach to the Traveling Salesman Problem: An Efficient Simulation Algorithm. Journal of Optimization …” „… , Kalyanmoy. 2004. Multi-Objective Optimization using Evolutionary Algorithms. Chichester: Wiley. Deb …” „… Genetic Algorithm for Multi-objective Optimization: NSGA- II. In Proceedings of the 6th International …”

Buffer management in manufacturing systems S. 7-38

„… dedicated to a special class of optimization methods, the Evolutionary Algorithms. The methods presented …” „… the shorter path in the end. In the ant colony optimization algorithms this principle is transferred …” „… optimization process, is fulfilled.31F Genetic Algorithms Genetic Algorithms as introduced by Holland 98 are …”

Titelei/Inhaltsverzeichnis

„… – Multi-Objective-Optimization – Evolution Strategies – Automotive Production – Manufacturing System – Assembly – Buffer …” „… simulation-based optimization method is proposed. This method is split into the evaluative methodology, here …” „… simulation, and the generative technique of evolution strategies, solving the multi-objective optimization …”

Introduction S. 1-6

„… method is the operation of buffers and simulation-based optimization. With the goal of improving buffer …” „… optimization is envisioned to be developed. 1.1 Background and motivation of research German automotive …” „… . Most studies on system optimization deal with allocation and sizing of buffers, whereas the filling of …”

Summary and outlook S. 97-99

„… status. Due to the chosen optimization algorithms, the Evolution Strategies, computation time is fast …” „… optimization method to find optimized parameter settings for adaptive buffer operation was developed. In …” „… within the system should be filled simulation-based optimization was applied. As this optimization method …”

Application of method S. 64-96

„… algorithm did not find the global optimum. 4.2.3 Multi-objective optimization The first striking result …” „… problem. In the proposed simulation-based optimization method algorithms considering multiple-objectives …” „… operation and simulationbased optimization have been described. In this chapter the developed method is …”

doi.org/10.51202/9783186058133

VDI Wissensforum GmbH - International Conference on Gears 2022

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VDI Wissensforum GmbH (Hrsg.)

International Conference on Gears 2022

Reihe: VDI-Berichte

Band 2389 2022

Treffer in den folgenden Teilen:

L. Bo Integrated optimization of structural and control parameters for a hybrid electric system S. 927-934

„… . The reinforcement learning algorithm is used to solve the optimization results in the iterative …” „… variables are discretizedSelect the starting point, and use the optimization algorithm to search the optimal …” „… Fig. 3: Parameter optimization process 3.2 Control strategy based on dynamic programming algorithm …”

P. Tenberge, R. Uelpenich, P. Dong, R. He Very fast tooth root optimization – general tool geometry for much smaller tooth root stresses S. 457-468

„… the optimization algorithm and are based on the initial variants a), c) and e). The optimizations can …” „… . With this experience, we could speed up our optimization algorithm again a lot. This result …” „… root optimization => General tool geometry for much smaller tooth root stressesProf. Dr.-Ing. P …”

P. Rodel, R. Spieler, M. Indenbirken, T. Nuisl Holistic friction optimization of transmissions – a significant contribution for sustainability S. 731-744

„… algorithms allow to perform optimizations for user-defined objective functions with varying constraints, e.g …” „… Holistic friction optimization of transmissions A significant contribution for sustainability …” „… are faced with new challenges. The topic friction optimization gains higher importance during …”

N. Hessinger, M. Braunstingl, H. Bansal Advanced use of DOE in gear geometry optimization S. 281-286

„… optimization algorithms provides a powerful tool which helps save time and cost in the improvement and …” „… Advanced Use of DOE in Gear Geometry Optimization Quality and robustness improvement of …” „… NVH-behavior, gear durability and efficiency through hypoid gear macro-geometry optimization N. Hessinger, M …”

C. Schonke, T. Magdy, K. Daubach, W. Kassem, M. Oehler, O. Koch Simulation of high torque density gearbox noise excitation S. 837-848

„… , Technische Universitat Kaiserslautern, Germany Abstract Market requirements for cost optimization of …” „… influence. Furthermore, gear bodies with more complex geometries (e.g. for weight optimization) are …” „… technologies, such as efficient contact calculation algorithms and selective degree of freedom reductions. The …”

E. Lamaj, J. Blomeke, F. Rudolph, J. Hermes A comprehensive, fully parametrized calculation model for improved helical-hypoid gearbox efficiency S. 825-836

„… . 2. Conventional Gearbox Optimization Depending on the complexity of physical phenomena under …” „… nonlinear behavior of the gear units is essential for reliable systematic optimizations. A bottom-up V&V …” „… Digital Twin Model Optimizations An automated toolchain based on input and output variables and an …”

T.-T. Mac, D. Iba, Y. Matsushita, S. Mukai, T. Inoue, A. Fukushima, N. Miura, T. Iizuka, A. Masuda, I. Moriwaki Application of genetic algorithms for parameters identification in a developing smart gear system S. 239-252

„… Application of Genetic Algorithms for parameters identification in a developing smart gear system …” „… Algorithms (GA) for identifying the parameters of the smart gear in a developing wireless gear health …” „… optimization process. Once the value of MSE becomes minimum, the best fitting of these two data is obtained …”

T. Konig, M. Kley, F. Wagner, M. Liebschner Enhanced damage classification on transmissions by generating synthetic data with Generative Adversarial Networks (GAN) S. 227-238

„… machine learning algorithms. The generation of a sufficient amount of data per condition class is relevant …” „… to ensure training stability and accuracy of the applied algorithms. But especially in early …” „… and time-consuming in practice. However, for the implementation of machine learning algorithms to …”

M. Furst, J. Gotz, M. Otto, K. Stahl Automation of gearbox design S. 787-802

„… practice. Design optimization usually is achieved through an iterative and time-consuming process of …” „… analyzing and tuning towards an optimization objective. In this paper a time-saving, automated and …” „… mixed integer nonlinear optimization problem results from the interdependence between these distinct …”

D. Park, A. Rezayat, Y. Gwen Gear design optimization for multi-mesh and multi-power flow transmissions under a broad torque range incorporated with multibody simulations S. 849-862

„… Gear design optimization for multi-mesh and multi-power flow transmissions under a broad torque …” „… aspect. Therefore, the development of a seamless gear design optimization software tool is crucial to …” „… scenario is translated into a multi-objective optimization in a multibody simulation environment with all …”

X. Zheng, Y. Hu FE analysis and predication on the traveling wave – resonance of aero-gears S. 915-926

„… on the commercial FEA software LS-DYNA, which has superiority in explicit algorithm and impact …” „… as targets in optimization. (a) (b) Fig. 2.1: Alignment and …” „… Inputting the above data into Kriging model and combined with NSGA-II algorithm, the optimized geometry of …”

Titelei/Inhaltsverzeichnis

„… aculty of Electrics and Informatics Aalen, Aalen University, GermanyApplication of genetic algorithms …” „… (Now: MAN Truck & Bus AG)Advanced use of DOE in gear geometry optimization …” „… geometry optimizationParametric study of hypocycloidal involute gears …”

F. Eigner, S. Heinrich, M. Berger An approach on contact analysis for micro geometry optimization of the gear unit HypoGear S. 943-950

„… An approach on contact analysis for micro geometry optimization of the gear unit HypoGear Florian …” „… algorithm is used to speed up the dimensioning of the special gear design by avoiding a time-consuming …” „… and not all points of the tooth in the calculation, an acceleration of the algorithm is achieved …”

F. Thurner Light into the black box: using AI software to identify unknown mechanisms of action and resolve acoustic/NVH problems – practical example of a passenger car powertrain S. 779-786

„… with a patented algorithm that, in conjunction with the right methodology, uncovers unknown mechanisms …” „… patented mathematical algorithm [1], valid prediction models can be generated even for prototypes with few …” „… an automatic algorithm. A sensitivity analysis is followed by a group/family formation of influence …”

F. Muller, S. Schumann, B. Schlecht Innovative tooth contact analysis with non-uniform rational b-spline surfaces S. 171-184

„… major focus in the development of gear boxes is the optimization of the gears. The aim is to increase …” „… ]. In contrast, ZaKo3D uses an interpolation algorithm based on Bézier surfaces or a triangulated mesh …” „… . Both approaches make it necessary to determine the contact dis-tances with numerical algorithms, such …”

J.-A. Meis, M. Walkowiak Influence of case hardness depth on tooth interior fatigue fracture S. 863-874

„… profile can be generated. Within a subsequently following algorithm, the line of action is determined …” „… analysis are supplied. Optimizations of the tooth root are also in the scope of this method. Fig. 3 …” „… optimizations The simplified assumptions for the residual stresses might also be only valid for symmetric gears …”

B. Legrady, M. Taesch, G. Tschirschnitz, C. F. Mieth Prediction of churning losses in an industrial gear box with spiral bevel gears using the smoothed particle hydrodynamic method S. 651-664

„… simulation model, the churning losses of the experiment are correctly reproduced. A post-processing algorithm …” „… loss optimization as well. Using this tool in a cloud-based environment leverages the potential of SPH …” „… : Development of a Mesh-Handling Algorithm to Reduce the CFD Simulation Time. In: Advances in Tribology 2016 …”

doi.org/10.51202/9783181023891

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