Cylinder Head Design of Experiment by using the Wartsila Digital Design Platform

Cattarinussi, Massimo; Leppänen, Anton; Könnö, Juho; Frondelius, Tero

doi:10.23998/rm.64923

Cited by 4 publications

(3 citation statements)

References 3 publications

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“…By using this methodology, it is possible to find out the possible critical locations, identify reasons for failures in the existing components and make design changes to achieve better component lifetime. Finally, the analysis can be simplified in such a way that it is possible to achieve reasonably accurate results in a shorter time for a quick concept phase design [3,8].…”

Section: Discussionmentioning

confidence: 99%

Thermomechanical Fatigue Analysis of Cylinder Head

Leppänen¹,

Kumpula²,

Vaara³

et al. 2017

RakMek

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Summary. The finite element simulation of a cylinder head has been carried out with Abaqus Standard using Z-mat material model, with thermal boundary conditions coming from combined conjugate heat transfer and gas-exchange simulations. The fatigue post-processing of results has been done with Z-post software using ONERA fatigue model. The resulting lifetime values have been found out to correspond well to observations from the field.

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Section: Discussionmentioning

confidence: 99%

Thermomechanical Fatigue Analysis of Cylinder Head

Leppänen¹,

Kumpula²,

Vaara³

et al. 2017

RakMek

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“…Figure 10. Virtual engine model of powertrain of medium speed diesel engine [128] This decade was the time to get into the Simulation Process and Data Management (SPDM) [142][143][144][145][146][147][148][149][150][151][152][153][154]. Some fundamental basic research was needed and performed.…”

Section: Millennium With the Wind Of Changementioning

confidence: 99%

History of structural analysis & dynamics of Wärtsilä medium speed engines

Frondelius¹,

Tienhaara²,

Haataja³

2018

RakMek

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This paper opens up the history of structural analysis and dynamics simulations of Wärtsilä engines. It cites already published articles and theses with some backgrounds information. It also discusses some of the backgrounds of the in-house tool development. Additionally, this paper presents the development of the computers and investment of the simulation capacity in order to understand how it has been the enabler of ever more complicated models. It lists the work done during fifty decades. The authors sincerely attempt to make this article as reader-friendly as possible, even though there are over 220 references, which of course demonstrates how dedicated Wärtsilä has been in supporting numerical simulations research in the past fivedecades.

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“…Cylinder head simulations, as described in Leppänen et al [53] and Cattarinussi et al [71], are quite challenging due to combined low cycle-high cycle loading, as Kumpula et al [55] explain, and, for example, injectors will have their dedicated analysis as in Vuotikka et al [72]. Additionally, Nyberg et al [73] show some cast iron component study of the component explosion.…”

Section: Virtual Validationmentioning

confidence: 99%

Simulation-Driven Development of Combustion Engines: Theory and Examples

Frondelius

Tienhaara

Kömi

et al. 2018

SAE Technical Paper Series

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T his paper describes the simulation-driven design process used in engines technology. The research question is "how to use research in the structural analysis and dynamics field to ensure world-class product development?" This paper describes research on simulation methodologies from the design process perspective, demonstrating the need for research in various steps of product development. Each section of the paper includes one or two practical examples in which research was needed to increase product design quality. In the product definition section, the Digital Design Platform (DDP) shows the coupling between product requirements and simulation tasks. At the concept design stage, it is shown that computational methods can optimize the placement of material in the case of the main bearing cap topology. The second example is JuliaFEM, an open-source finite element method (FEM) platform, which is suitable for heavy-duty method development, where the internals of the FE solver is needed to make new calculation methodologies available. The next section is about detailed design, where an example of an oil sump welds fatigue illustrates the continuous improvement of the simulation methodology. The second example is connecting rod fretting calculation, which illustrates the full complexity of the structural analysis and dynamics simulations. The second last process step is the virtual validation, where first the cylinder head simulation methodology shows the internal connections between different disciplines' simulations. Another example here is the crankshaft virtual validation process, which describes the complexity of the "simple" component calculation as well as illustrates the number of needed competencies. Finally, in the validation process step, Big Data analyses describe the internals and complexity of the methodologies. Lastly, counterweight measurement device development illustrates that validation of the simulation models and methods sometimes leads toward a measurement device development project. As a conclusion, all the previous methodologies are used to build the Wärtsilä 31 engine, which is the most efficient four-stroke engine in the world. It is, of course, a performance achievement, but a lot of research in simulation methodologies, as explained, was needed to make a reliable product with such a high cylinder peak pressure.

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Cylinder Head Design of Experiment by using the Wartsila Digital Design Platform

Cited by 4 publications

References 3 publications

Thermomechanical Fatigue Analysis of Cylinder Head

Thermomechanical Fatigue Analysis of Cylinder Head

History of structural analysis & dynamics of Wärtsilä medium speed engines

Simulation-Driven Development of Combustion Engines: Theory and Examples

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