A Robust Solution for a Power-Train Mounting System for Automotive NVH Refinements

Ambardekar, Milind; Yogesh, Adatiya; Naidu, Sudhakara

doi:10.4271/2015-26-0140

Cited by 5 publications

(2 citation statements)

References 3 publications

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“…Much research has been carried out to improve the ill-conditioning of matrix inversion by singular value decomposition (SVD). For NVH refinement of automotives, much attention has been paid to optimization design of PMS [18][19][20][21][22][23]; however, there is little research on combining TPA for dominant path identification with optimization design of resilient mounts. e goal of this paper is to present a solution method to solve the floor vibration problem of light buses, in which the method combines matrix inversion TPA for identification of path contribution with the optimization of energy decoupling rate of PMS.…”

Section: Introductionmentioning

confidence: 99%

Rubber Stiffness Optimization for Floor Vibration Attenuation of a Light Bus Based on Matrix Inversion TPA

Shi

Yang

et al. 2020

Shock and Vibration

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The NVH characteristics of light buses are a very important performance for market competitiveness. To solve the serious floor vibration of a light bus at speed of 60 km/h and 90 km/h, we first derive the matrix inversion TPA (MITPA) method, and then transfer path contribution is analyzed by applying matrix inversion TPA with TPA model establishment, operational vibration test, and FRF measurement. Next, the energy decoupling rate of the powertrain mount system (PMS) is optimized by rubber stiffness optimization based on the path contribution analysis taking both amplitude and phase into consideration. The optimized natural frequencies and energy decoupling rate indicate that energy decoupling rate (EDR) of each DoF of the powertrain mount system is improved. Finally, to verify the optimization effect, this paper implements an operational vibration test with optimized mount installed. The results indicate that floor vibration of postoptimization is improved significantly compared with that of preoptimization. This paper offers a method for engineers to improve vibration problem of vehicle by combining experimental TPA for identification of dominant paths with optimization procedure.

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Section: Introductionmentioning

confidence: 99%

Rubber Stiffness Optimization for Floor Vibration Attenuation of a Light Bus Based on Matrix Inversion TPA

Shi

Yang

et al. 2020

Shock and Vibration

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“…Due to the dilemma between the lighter vehicle and the more powerful engine, the NVH performance of an engine becomes much more significant. Powertrain mounting system (PMS) is not only designed for supporting the weight of the powertrain and controlling the displacement of the powertrain center of gravity (CG), but also of great help for improving the NVH performance of an engine, especially when the vehicle is in the condition of key on/off, 1,2 idle, 3 and so on.…”

Section: Introductionmentioning

confidence: 99%

An efficient analysis and optimization method for powertrain mounting systems involving interval uncertainty

Cai

Shangguan

Lü

2019

Proceedings of the Institution of Mechanical Engineers, Part D:

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Uncertainty widely exists in the powertrain mounting system of a vehicle. The traditional analysis and optimization methods for powertrain mounting system design are often based on deterministic or random models. In this study, an efficient analysis and optimization method is developed for powertrain mounting system design involving interval uncertainty. In the proposed method, the uncertain parameters of powertrain mounting system are treated as interval variables, and an efficient method called as Chebyshev-Vertex method is developed to fast calculate the lower and upper bounds of the natural frequencies and decoupling ratios of powertrain mounting system. Monte-Carlo method is taken as a reference method to verify the calculation. Then, an optimization model is established based on Chebyshev-Vertex method, in which the interval responses of decoupling ratios are used to build up optimization objective while the interval responses of natural frequencies and decoupling ratios are taken to create optimization constraints. The optimization model of the powertrain mounting system with interval parameters is generally a double-loop nested problem, and it is rather time-consuming on calculation. However, based on Chebyshev-Vertex method, the optimization model can be approximately simplified into a single-loop one and the calculation efficiency is greatly improved. A numerical example is provided to demonstrate the effectiveness of the proposed method on the analysis and optimization design of the powertrain mounting system involving interval uncertainty.

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Optimization Solutions for Fan Shroud

Konikineni¹,

Sundaram²,

Sathish³

et al. 2016

SAE Technical Paper Series

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A Robust Solution for a Power-Train Mounting System for Automotive NVH Refinements

Cited by 5 publications

References 3 publications

Rubber Stiffness Optimization for Floor Vibration Attenuation of a Light Bus Based on Matrix Inversion TPA

Rubber Stiffness Optimization for Floor Vibration Attenuation of a Light Bus Based on Matrix Inversion TPA

An efficient analysis and optimization method for powertrain mounting systems involving interval uncertainty

Optimization Solutions for Fan Shroud

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