رسالة جامعية
Model Reduction Techniques to Improve the Efficiency of Flexible Multibody Simulations (Ontwikkeling en validatie van modelreductietechnieken voor de efficiënte simulatie van flexibele meerlichamendynamica) ; Model Reduction Techniques to Improve the Efficiency of Flexible Multibody Simulations
| العنوان: | Model Reduction Techniques to Improve the Efficiency of Flexible Multibody Simulations (Ontwikkeling en validatie van modelreductietechnieken voor de efficiënte simulatie van flexibele meerlichamendynamica) ; Model Reduction Techniques to Improve the Efficiency of Flexible Multibody Simulations |
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| المؤلفون: | Heirman, Gert |
| المساهمون: | Desmet, Wim, U0011973, Sas, Paul, U0008464 |
| سنة النشر: | 2011 |
| المجموعة: | KU Leuven: Lirias |
| مصطلحات موضوعية: | flexible multibody dynamics, interface reduction, static modes switching, global modal parameterization, body-level model reduction, system-level model reduction, real-tiem simulation |
| الوصف: | The ever-increasing trend to design machines and processes to befaster, more lightweight, more energy-efficient and more reliablecauses virtual prototyping to gain importance over physicalprototyping. Accurate numerical modeling techniques for flexiblemultibody systems are needed in the different stages of thedesign. Furthermore, numerical models are not only used in thedesign phase; certain applications rely on simulation results ofnumerical models computed in real-time. Real-time targets arecurrently only met for highly simplified multibody models.However, in industry a strong desire exists to extend real-timecapabilities to more advanced models.In model reduction, the evolution of the system state is decomposedin dominant and negligible motion patterns. In the currentstate-of-the-use in flexible multibody modeling mainly body-levelmodel reduction is used. Body-level model reduction refers tomodel reduction applied to the flexibility description ofindividual bodies, i.e. mechanism components. These reduced bodyflexibility models are then incorporated in the model equations ofthe overall system. In case of a multitude of possible loadingpoints on a flexible body, its reduced body flexibility model willbe of significant size, such that time integration of the overallmultibody model becomes expensive. A first goal of this researchis to develop and validate efficient modeling techniques for therepresentation of flexibility in multibody dynamics, especiallytargeting this flaw in the state-of-the-use.A first solution to this problem is interface reduction, in which component interaction is approximated by a limited set of interaction patterns.An alternative interface reduction scheme is proposed and the associated computational hurdles are solved. This offers the user an alternative to model intercomponent interaction, without the numerically introduced artificial stiffness of conventional techniques. In a numerical experiment the effect of this artificial stiffness is illustrated.However, accuracy requirements can ... |
| نوع الوثيقة: | doctoral or postdoctoral thesis |
| اللغة: | Dutch; Flemish |
| العلاقة: | https://lirias.kuleuven.be/handle/123456789/306584Test; https://lirias.kuleuven.be/bitstream/123456789/306584/1//phd_GertHeirman.pdfTest |
| الإتاحة: | https://lirias.kuleuven.be/handle/123456789/306584Test https://lirias.kuleuven.be/bitstream/123456789/306584/1//phd_GertHeirman.pdfTest |
| رقم الانضمام: | edsbas.A1EF649E |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |