Identification of the Rear Door Opening Noise in a Passenger Car

Sim, Woojeong; Kim, Jae-Won; Lee, Sang-soo; Lee, Booyoung; Yun, Younguk; Chung, Jintai

doi:10.1007/s12239-021-0021-7

“…For the gear transmission process noise and internal vibration reduction are mainly divided into two methods: active vibration control and passive vibration control [5]. Active control contains gear parameters optimization for instance gear tooth modification, but it is costly and complex to calculate gear tooth parameters [6][7], making it difficult to achieve high dynamic performance. On the other hand, passive control involves utilizing damping materials to dissipate energy.…”

Section: Introductionmentioning

confidence: 99%

Temperature control-based design of variable damping and lightweight gear bodies

Yang,

Zhang,

Li

et al. 2024

Int J Adv Manuf Technol

0

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The sustainability of today's industry turned into a critical requirement on account of energy cost increases, environmental pollution, and carbon emissions. As an important segment in mechanical drive, the vibration and noise from gear transmission negatively impact the physical and psychological health of workers and interfere with the machine running. This paper proposes a new temperature-controlled vibration-damping lightening polymer composite gear model with a modified lightweight web structure. The spur gear web was replaced with a spoke-like structure connected with a ring structure that adheres to the heating film. That was required to assure torsional rigidity and compliance meanwhile controlling the web structural damping performance. For experimental purposes, the gears were manufactured from three kinds of viscoelastic polymer using additive manufacturing technology. The gear frequency sweeping excitation testbed was built in the experiment. The vibration exciter and gear dynamic responses were measured through the force and torque sensor. The experimental result coincides with vibration analysis in the finite element (FE) method. In the tests, the modal frequency and damping of gears were measured at different temperatures by control heating films. Variable damping could be achieved by changing the viscoelastic polymer temperature and gear web structure. This research can provide guidance for the polymer material gear damping control in mechanical transmission applications.

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“…Active vibration control involves optimizing the gear parameters, such as gear tooth modification. On the other hand, active vibration control is expensive and complicated for calculating the gear tooth parameters (Kim and Lee, 2007), making it difficult to meet the requirements of high dynamic performance. Passive vibration control dissipates energy using damping materials.…”

Section: Introductionmentioning

confidence: 99%

Characterization of damping in 3D metal printed gear body using parameter optimization

Yang

¹

,

Zhang

²

,

Li

³

et al. 2023

Journal of Vibration and Control

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With the rapid development of the global economy and the widespread use of high-speed machinery, vibration and noise pollution is becoming increasingly serious. The increased energy costs, environmental pollution, and carbon emissions have prioritized sustainable development for industry. As an important link of mechanical transmission, the gear transmission vibration and noise adversely affect the physical and mental health of operators and interfere with the normal use of machinery. This paper proposes a new metal 3D printing-made vibration-damping lightweight gear model. The solid gear web is replaced with a lightening hole structure that is expected to ensure rigidity and torsional compliance while controlling the damping effects of the gear web structure. Gears were manufactured from an additive manufacturing material using a metal 3D printing technique. This work advanced an experimental analysis of the dissipation properties of metal printed gear exploiting vibration tests. A gear frequency-sweeping excitation test bench was designed and developed to simulate in-plane excitation to produce a circumferential torsional mode of the specimen. Circumference damping estimates are guided by executing vibration exciter excitation on the setup. The half-power bandwidth and modal fitting methods were arranged and compared, relying on the measured frequency response function (FRF) single-degree-of-freedom (SDOF) approximation.

show abstract

Temperature control-based design of variable damping and lightweight gear bodies

Yang,

Zhang,

Li

et al. 2023

Preprint

0

View full text Add to dashboard Cite

The sustainability of today's industry turned into a critical requirement on account of energy cost increases, environmental pollution, and carbon emissions. As an important segment in mechanical drive, the vibration and noise from gear transmission negatively impact the physical and psychological health of workers and interfere with the machine running. This paper proposes a new temperature-controlled vibration-damping lightening polymer composite gear model with a modified lightweight web structure. The spur gear web was replaced with a spoke-like structure connected with a ring structure that adheres to the heating film. That was required to assure torsional rigidity and compliance meanwhile controlling the web structural damping performance. For experimental purposes, the gears were manufactured from three kinds of viscoelastic polymer using additive manufacturing technology. The gear frequency sweeping excitation testbed was built in the experiment. The vibration exciter and gear dynamic responses were measured through the force and torque sensor. The experimental result coincides with vibration analysis in the finite element (FE) method. In the tests, the modal frequency and damping of gears were measured at different temperatures by control heating films. Variable damping could be achieved by changing the viscoelastic polymer temperature and gear web structure. This research can provide guidance for the polymer material gear damping control in mechanical transmission applications.

show abstract

Identification of the Rear Door Opening Noise in a Passenger Car

Cited by 3 publications

References 16 publications

Temperature control-based design of variable damping and lightweight gear bodies

Temperature control-based design of variable damping and lightweight gear bodies

Characterization of damping in 3D metal printed gear body using parameter optimization

Temperature control-based design of variable damping and lightweight gear bodies

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