Multibody Simulation for the Vibration Analysis of a Turbocharged Diesel Engine

Armentani, Enrico; Caputo, Francesco; Esposito, Luca; Citarella, Roberto

doi:10.20944/preprints201805.0223.v1

Cited by 17 publications

(1 citation statement)

References 16 publications

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“…When gears work, especially under high loads and speeds, the noise and vibration caused by the rotation of the gears can be unbearable for people [ 12 , 13 , 14 ]. Even if it is possible to use some countermeasures against noise on the gears after they have been designed and built, in the design phase of a gearbox, predicting all of the noise reduction factors related to meshing and components—such as the supports, the transmission shafts, and the cases—is always preferred.…”

Section: Introductionmentioning

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: Introductionmentioning

confidence: 99%

Noise Reduction in Spur Gear Systems

Liguori

Armentani

Bertocco

et al. 2020

Entropy

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Structural Analysis and Application of Non-Standard Components Based on Genetic Algorithm

et al. 2019

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Aiming at the problems of low efficiency, heavy quality, and high cost of traditional components, it is necessary to study a design and analysis method of non-standard components. Taking the non-standard parts-turret loading and -unloading device as the carrier, the key parts of the non-standard parts are extracted for structural design and the multi-objective mathematical model and modal theory model are established. The optimization analysis of the key parts is carried out by genetic algorithm. Finally, the optimization results are compared and simulated by ANSYS Workbench. The results show that: in this case, the genetic algorithm optimized data with other data, the overall quality difference is 4.1%. The first six order modal values in the optimized results are in the range of 68 Hz to 130 Hz, which provides a basis for similar research in the future.

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Aeroacustic and Vibroacoustic Advancement in Aerospace and Automotive Systems

2020

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This Special Issue highlights the latest enhancements in the abatement of noise and vibrations of aerospace and automotive systems. The reduction of acoustic emissions and the improvement of cabin interior comfort are on the path of all major transportation industries, having a direct impact on customer satisfaction and, consequently, the commercial success of new products. Topics covered in this Special Issue deal with computational, instrumentation and data analysis of noise and vibrations of fixed wing aircrafts, satellites, spacecrafts, automotives and trains, ranging from aerodynamically generated noise to engine noise, sound absorption, cabin acoustic treatments, duct acoustics and vibroacoustic properties of materials. The focus of this Special Issue is also related to industrial aspects, e.g.,: numerical and experimental studies have been performed for an existing and commercialized engine to enable design improvements aimed at reducing noise and vibrations; moreover, an optimization is provided for the design of low vibroacoustic volute centrifugal compressors and fans whose fluids should be strictly kept in the system without any leakage. Existing procedures and algorithms useful to reach the abovementioned objectives in the most efficient way are illustrated in the collected papers.

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Multibody Simulation for the Vibration Analysis of a Turbocharged Diesel Engine

Cited by 17 publications

References 16 publications

Noise Reduction in Spur Gear Systems

Noise Reduction in Spur Gear Systems

Structural Analysis and Application of Non-Standard Components Based on Genetic Algorithm

Aeroacustic and Vibroacoustic Advancement in Aerospace and Automotive Systems

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