Analyse und Optimierung von Mehrkörpersystemen

Bestle, Dieter

doi:10.1007/978-3-642-52352-6

Cited by 97 publications

(38 citation statements)

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“…After execution of both analyses, the results are returned to the optimizer. The global design problem formulation combines Equations (2) and (5) and represents a multi-criterion optimization problem [19] with design parameters…”

Section: Holistic Design Strategymentioning

confidence: 99%

Component-Specific Preliminary Engine Design Taking into Account Holistic Design Aspects

Hendler

Lockan

Bestle

et al. 2018

IJTPP

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Efficient aero engine operation requires not only optimized components like compressor, combustor, and turbine, but also an optimal balance between these components. Therefore, a holistic coupled optimization of the whole engine involving all relevant components would be advisable. Due to its high complexity and wide variety of design parameters, however, such an approach is not feasible, which is why today's aero engine design process is typically split into different component-specific optimization sub-processes. To guarantee the final functionality, components are coupled by fixed aerodynamic and thermodynamic interface parameters predefined by simplified performance calculations early in the design process and held constant for all further design steps. In order not to miss the optimization potential of variable interface parameters and the unlimited design space on higher-fidelity design levels, different coupling and optimization strategies are investigated and demonstrated for a reduced compressor-combustor test case problem by use of 1D and 2D aero design tools. The new holistic design approach enables an exchange of information between components on a higher-fidelity design level than just simple thermodynamic equations, as well as the persecution of global engine design objectives like efficiency or emissions, and provides better results than separated component design with fixed interfaces.

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Section: Holistic Design Strategymentioning

confidence: 99%

Component-Specific Preliminary Engine Design Taking into Account Holistic Design Aspects

Hendler

Lockan

Bestle

et al. 2018

IJTPP

Self Cite

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“…In this paper we consider a problem of parameter optimization of tuned mass damper for three-degree-of-freedom vibration systems using sequential quadratic programming method [7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Parameter optimization of tuned mass damper for three-degree-of-freedom vibration systems

Khang¹,

Loc²,

Tuấn³

2013

Vietnam J. Mech.

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Abstract. There are problems in mechanical, structural and aerospace engineering that can be formulated as Nonlinear Programming. In this paper, the problem of parameters optimization of tuned mass damper for three-degree-of-freedom vibration systems is investigated using sequential quadratic programming method. The objective is to minimize the extreme vibration amplitude of vibration models. It is shown that the constrained formulation, that includes lower and upper bounds on the updating parameters in the form of inequality constraints, is important for obtaining a correct updated model.

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“…[6]. Moreover, the behavior of the model can be improved with respect to the traveling comfort and the safety of the system through multicriteria optimization as described in Bestle [3] or Eberhard [11], respectively. Such an optimization is supported by the above mentioned symbolic-numeric formulation of the equations of motion.…”

Section: Introductionmentioning

confidence: 99%

“…For optimization purposes the factor 1 = = = = k may be chosen as a first approximation. The corresponding mean square value 2 f σ is taken as criterion 3 ψ which characterizes the safety of the coach,…”

mentioning

confidence: 99%

SYMBOLIC-NUMERIC ANALYSIS OF FLEXIBLE MULTIBODY SYSTEMS^*

Claus

Schiehlen

2002

Mechanics of Structures and Machines

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The paper presents the vibration analysis and the evaluation of dynamic stresses in flexible multibody systems, and their parameter optimization using symbolic-numeric methods. Based on the fundamentals of multibody system modeling the force method and the deformation method are described and the latter one is extended to include the static and dynamic responses of the structure. Performance criteria are defined for optimization. The overall design process is supported by appropriate software for all steps of analysis and optimization. The application of the approach is devoted to railway dynamics. For the analysis of the dynamic stresses in a railway wheelset the extended deformation approach is used. The simulation results indicate that the durability of the design of the wheelset under consideration is satisfactory. The vertical vibrations of the passenger coach with rigid wheelsets and a flexible bogie frame results in acceleration amplitudes of the carbody which may cause a brumming or droning noise. The substitution of the rigid wheelsets by radialelastic ones reduces these amplitudes considerably. An optimization of spring and damper coefficients of the model with radialelastic wheels results in reduced droning noise of such a passenger coach and lower force level between wheel and rail. The symbolic approach is especially highlighted for the simulation at different vehicle speeds and the optimization of the suspension parameters.

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Analyse und Optimierung von Mehrkörpersystemen

Cited by 97 publications

References 0 publications

Component-Specific Preliminary Engine Design Taking into Account Holistic Design Aspects

Component-Specific Preliminary Engine Design Taking into Account Holistic Design Aspects

Parameter optimization of tuned mass damper for three-degree-of-freedom vibration systems

SYMBOLIC-NUMERIC ANALYSIS OF FLEXIBLE MULTIBODY SYSTEMS^*

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Analyse und Optimierung von Mehrkörpersystemen

Cited by 97 publications

References 0 publications

Component-Specific Preliminary Engine Design Taking into Account Holistic Design Aspects

Component-Specific Preliminary Engine Design Taking into Account Holistic Design Aspects

Parameter optimization of tuned mass damper for three-degree-of-freedom vibration systems

SYMBOLIC-NUMERIC ANALYSIS OF FLEXIBLE MULTIBODY SYSTEMS*

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SYMBOLIC-NUMERIC ANALYSIS OF FLEXIBLE MULTIBODY SYSTEMS^*