Topology Optimization Procedure of Aircraft Mechanical Components Based on Computer-Aided Design, Multibody Dynamics, and Finite Element Analysis

Manca, Adriano Gabriel; Pappalardo, Carmine Maria

doi:10.1007/978-3-030-50491-5_16

Cited by 19 publications

(7 citation statements)

References 39 publications

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“…Therefore, in order to evaluate the sound pressure level resulting from the meshing spur gear pair, different coupled Eulerian–Lagrangian analyses were carried out, putting the gears in an Eulerian mesh, which represented air (modeled as a perfect gas), since noise is characterized by pressure waves that propagate through a medium. A noise, vibration, and harshness (NVH) analysis could not be properly performed, since it could only be used to evaluate the noise resulting from rolling bearings and supporting system vibrations [ 48 , 49 , 50 , 51 ]. The following table ( Table 3 ) shows the parameters that characterized the different examined conditions.…”

Section: Resultsmentioning

confidence: 99%

Noise Reduction in Spur Gear Systems

Liguori

Armentani

Bertocco

et al. 2020

Entropy

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This article lists some tips for reducing gear case noise. With this aim, a static analysis was carried out in order to describe how stresses resulting from meshing gears affect the acoustic emissions. Different parameters were taken into account, such as the friction, material, and lubrication, in order to validate ideas from the literature and to make several comparisons. Furthermore, a coupled Eulerian–Lagrangian (CEL) analysis was performed, which was an innovative way of evaluating the sound pressure level of the aforementioned gears. Different parameters were considered again, such as the friction, lubrication, material, and rotational speed, in order to make different research comparisons. The analytical results agreed with those in the literature, both for the static analysis and CEL analysis—for example, it was shown that changing the material from steel to ductile iron improved the gear noise, while increasing the rotational speed or the friction increased the acoustic emissions. Regarding the CEL analysis, air was considered a perfect gas, but its viscosity or another state equation could have also been taken into account. Therefore, the above allowed us to state that research into these scientific fields will bring about reliable results.

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Section: Resultsmentioning

confidence: 99%

Noise Reduction in Spur Gear Systems

Liguori

Armentani

Bertocco

et al. 2020

Entropy

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“…The corner blocks are suitable for housing the "twistlocks" (rotating pins), which allow us to handle the tank containers or to fix them together (as happens in stacking); in fact, by rotating their lever, they act as a more stable connection between the tank container and the structure on which they have to be located [16,17].…”

Section: Tank Container For Foodstuffmentioning

confidence: 99%

Study of Tank Containers for Foodstuffs

et al. 2021

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In this study, we examined a tank container for foodstuff that is generally used for the transport of foodstuffs. With the aid of the “ANSYS R17.0” program code, a numerical model of the tank container for foodstuffs was realized. Further, to validate the considered model, the tank container considered was submitted to the most important ISO tests concerning both its support frame and the tank. The results obtained from the FEM analysis, in terms of displacement for each test, were compared with those provided by the manufacturer and related to the tank container considered, evaluating the difference between the numerical results with the experimental ones. This allowed us to validate the model examined. Furthermore, the results obtained from each test, in terms of stress, have made it possible to locate the areas with the highest equivalent stress and quantify the maximum value, comparing it with the allowable stress. In this way, a better understanding of the structure was achieved, and it was detected that the most stressed area is that of the connections between the container and the frame. Furthermore, modal analysis was carried out, in which the natural frequencies relating to the most dangerous modes of vibrations were found, that is, with the lowest frequency values. Finally, changes for the considered tank container were examined, and it was found that, by changing parameters, such as the thickness of the plate and skirt, and subsequently acting on the arrangement of the corner supports, the highest value of the stresses generated by the loads related to the ISO tests, it is significantly lowered, resulting in a better distributed stiffening of the structure and a reduction, although minimal, of weight. It is evident that this modeling and validation method, suitably integrated by further calculation modules, can be used in an iterative optimization process.

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“…According to data published in [5,6], the use of CAD allowed, at the end of the twentieth century, to two to three times reduce the design and adjustment time of aircraft, three to five times -the time of preparation of their production. At the same time, development costs are reduced by 50-80 %.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Devising a concept of integrated design and modeling of aircraft

Grebenikov

Humennyi

Dveirin³

et al. 2021

EEJET

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The analysis of aircraft design methods reported here has revealed that building a competitive aircraft necessitates devising a scientifically based concept of integrated aircraft design employing CAD/CAM/CAE/PLM software suites. A generalized concept of integrated design and three-dimensional computer modeling of aircraft involving the CAD/CAM/CAE/PLM systems has been developed. Based on the proposed concept, the principles of integrated design of aircraft were devised. The features of designing the training and training-combat aircraft, transport-category aircraft, light civilian aircraft have been described. A method for determining the take-off weight, design parameters, and formation of the general appearance of aircraft has been improved. The method is intended to form the appearance of the aircraft at the stages of preliminary design, the purpose of which is reduced to determining the permissible version of the aircraft project. The project must meet the predefined requirements and restrictions in the selected aircraft scheme and the assigned set of parameters that characterize its airframe and power plant. A method of parametric modeling of aircraft has been improved, which includes the stages of creating a master geometry of the aircraft and a model of space distribution. Parametric models of master geometry and models of space distribution, training and training-combat aircraft, transport-category aircraft, light civilian aircraft have been constructed. Methods of integrated design of aircraft main units have been devised and theoretically substantiated. Parametric models of master geometry of the wing for a training aircraft, the wings, appendage, and fuselage of a light civilian aircraft were built, taking into consideration the design features of aircraft units of various categories

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Topology Optimization Procedure of Aircraft Mechanical Components Based on Computer-Aided Design, Multibody Dynamics, and Finite Element Analysis

Cited by 19 publications

References 39 publications

Noise Reduction in Spur Gear Systems

Noise Reduction in Spur Gear Systems

Study of Tank Containers for Foodstuffs

Devising a concept of integrated design and modeling of aircraft

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