Reduction of Driveline Boom Noise and Vibration of 40 Seat Bus through Structural Optimization

Frank, Jos; Doshi, Sohin; Rao, Manchi Venkateswara; Raghavendran, Prasath

doi:10.4271/2017-28-1926

Cited by 6 publications

(1 citation statement)

References 3 publications

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“…In this case, the operating deflection shape (ODS) method can be employed to provide the dynamic behavior of the systems at the concerned frequency or moment. 22 Frank et al 23 applied ODS method to further investigate the bus floor's vibration caused and transmitted simultaneously by rear differential and suspension link rods. Devriendt et al 24 found that transmissibility measurements used to obtain the ODS can also allow the estimation of the modal parameters and mode shapes.…”

Section: Introductionmentioning

confidence: 99%

An experimental investigation of resonance sources and vibration transmission for a pure electric bus

Zeng

Tan

Ding

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part D:

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Electric vehicles generally have a better noise, vibration, and harshness quality than traditional vehicles due to the relatively quiet electric motors. By contrast, the noise, vibration, and harshness issues of the driveline system become more outstanding and significant in the absence of the “masking effect” by the engine. The electrification of the powertrain has also brought many changes in the sources or transmission of vibration, which has led to some new noise, vibration, and harshness issues. Specifically, the intense vibration of the prototype bus appears when driving in third gear, which makes the passengers uncomfortable. This paper presents an efficient analytical strategy for identifying the resonance sources and vibration transmission for a pure electric bus. The strategy incorporates order analysis, operating deflection shape, and transfer path analysis. Order analysis shows that the resonance is primarily caused by the second-order excitation associated with the driveline, and the vibration sources are further identified using operating deflection shape analysis. Moreover, the vibration transfer paths from the driveline to the bus floor are quantitatively determined by the transfer path analysis method. The results show that the coupling vibration of the powertrain and the rear drive axle, which amplifies the resonance of the whole driveline, is transmitted to the bus floor primarily through powertrain mounts and V rods. Based on the results, the design and structure modifications of the driveline and transfer paths are recommended to handle this issue. The proposed identification strategy would be beneficial for accurate and efficient engineering troubleshooting on the vibration issues.

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Section: Introductionmentioning

confidence: 99%

An experimental investigation of resonance sources and vibration transmission for a pure electric bus

Zeng

Tan

Ding

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part D:

View full text Add to dashboard Cite

show abstract

Control of noise in the passenger compartment of the bus due to structural vibration

Le,

Huynh

2023

Proceedings of the Institution of Mechanical Engineers, Part D:

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The design of the chassis with an appropriate structure is thought to be an efficient way for decreasing vibration and noise since chassis vibration is one of the key causes that generates noise in the bus passenger compartment. This study uses the Frequency Response Function Method (FRFM) and Modal Participation Method (MPM) to analyze an acoustic finite element model of a bus frame model THACO TB120S. To perform the noise radiation caused by the vibration of the bus frame structure, the chassis was triggered by a diesel engine. The bus engine has a six-cylinder, four-stroke, and in-line arrangement. The triggered frequencies from the engine were operated in the range of 1–100 Hz, while the maximum engine speed was 1900 rpm. The vibration of the roof array and the noise of the bus compartment was examined analytically at four locations on the bus structure. The results show that the performance of the bus structure with respect to the noise generation was significantly improved. The resonant frequencies of noise observed from analytic results are verified by experimental measurements in terms of sound pressure. The acoustic resonance in the bus passenger compartment mainly occurs in the frequency range from 15 to 70 Hz. The peak values of the sound pressure are significantly decreased when the roof modification technique was applied. An increase in the stiffness of the roof using the structural correction method could have a positive effect on noise reduction by approximately 60%.

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Effective Power Transmission By Means of Air Compressor, Air Turbine System and Solar Concentrators

James

2021

IJEAT

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Usually Electrical Power is generated in large scale using Air Compressors and Gas Turbine Systems. This type of Power plants is usually used as Peak load Power Plants. These Power Plants can assist in various power generation process along with base load power plants like Thermal Power Plants, Combined cycle power plants etc. Here in this Research paper, a new method of Power generation is being discussed. It utilizes an Air Compressor-Air Turbine System for Electrical Power generation by means of effective power transmission. This method is simple and less costly. It requires less space and less skilled laborer. It can be used in Stand by and Emergency power generation systems. An ANN model is carried out which gives satisfactory working conditions. The cost analysis is being carried out by considering small capacity and micro power production conditions. The efficiency attained during this method of power generation is around 55%. By incorporating large macro energy systems, we can produce more power output and also generate more electrical power. By considering all these factors it can be considered as a very good working model.

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Reduction of Driveline Boom Noise and Vibration of 40 Seat Bus through Structural Optimization

Cited by 6 publications

References 3 publications

An experimental investigation of resonance sources and vibration transmission for a pure electric bus

An experimental investigation of resonance sources and vibration transmission for a pure electric bus

Control of noise in the passenger compartment of the bus due to structural vibration

Effective Power Transmission By Means of Air Compressor, Air Turbine System and Solar Concentrators

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