Zobrazeno 1 - 10
of 39
pro vyhledávání: '"Hee-Min Noh"'
Autor:
Hee-Min Noh
Publikováno v:
Advances in Mechanical Engineering, Vol 16 (2024)
This study aimed to reduce the vibration of an aluminum plate using a single lead zirconate titanate (PZT) electrical circuit. First, the natural frequencies and modes of the aluminum plate were analyzed using an analytical method to determine the dy
Externí odkaz:
https://doaj.org/article/d4e944f6e8f04928b6c46d03c594dd6c
Autor:
Hee-Min Noh
Publikováno v:
Advances in Mechanical Engineering, Vol 16 (2024)
This study developed a method for improving the transmission loss performance of aluminum extrusion by reinforcing the inner space of the extruded material with a lightweight material, such as acrylic plastic. First, the dynamic characteristics of th
Externí odkaz:
https://doaj.org/article/dd18838563454701aa56676e65c0c473
Autor:
Hee-Min Noh
Publikováno v:
Advances in Mechanical Engineering, Vol 13 (2021)
The bellows of the vehicle are vulnerable to noise because of the low transmission loss among the components. Therefore, in this study, we modified the thickness and the structure of the bellows to improve transmission loss. Based on the impedance tu
Externí odkaz:
https://doaj.org/article/0546f7a792bd473cbb72bd416d85e267
Autor:
Hee-Min Noh
Publikováno v:
Advances in Mechanical Engineering, Vol 13 (2021)
When the speed of a railway vehicle increases, the level of noise inside the vehicle inevitably increases as well, which is a major cause of discomfort to passengers. The most effective method is to improve the overall noise reduction performance of
Externí odkaz:
https://doaj.org/article/f15a97e39b8a45b5a14c8654b1c4a1fe
Publikováno v:
Advances in Mechanical Engineering, Vol 12 (2020)
Curve squeal noise is one of the most prominent noises among railway noises. High levels of noise are generated when a train passes through curved sections, resulting in several complaints from the residents and vehicle passengers. To mitigate this p
Externí odkaz:
https://doaj.org/article/25667577ffe447d2af7c511894ac8cdf
Autor:
Hee-Min Noh
Publikováno v:
Advances in Mechanical Engineering, Vol 12 (2020)
Interior noise in high-speed trains creates passenger discomfort and fatigue. In particular, the noise generated around the gangway between carriages tends to be easily transmitted to the passenger spaces due to the large noise component in the low-f
Externí odkaz:
https://doaj.org/article/220e64eb8425451d8efd8396f66e5059
Autor:
Hee-Min Noh
Publikováno v:
Advances in Mechanical Engineering, Vol 11 (2019)
In this study, we investigated the characteristics and the influence of the aero-acoustic noise generated from a pantograph using various experimental approaches in a wind tunnel. First, the noise generated at various flow velocities was measured and
Externí odkaz:
https://doaj.org/article/86e87cdcb1904275989d23f2fad1c7fc
Autor:
Hee-Min Noh
Publikováno v:
Advances in Mechanical Engineering, Vol 11 (2019)
A pantograph in contact with a catenary for power supply is one of the major aerodynamic noise sources in high-speed trains. To reduce pantograph noise, it is essential to understand the noise generation mechanism of the pantograph. However, it is di
Externí odkaz:
https://doaj.org/article/6971f4ffed894ce18ed76c78f08887e7
Autor:
Hee-Min Noh
Publikováno v:
Advances in Mechanical Engineering, Vol 10 (2018)
High-speed trains have a sustained high-noise level for long periods during operation. Although such high-noise levels are effective for acoustic energy harvesting, a practical design for an acoustic energy harvesting system from a high-speed train i
Externí odkaz:
https://doaj.org/article/092e7dd33f8a4516b73897edc0c976c1
Autor:
Hee-Min Noh
Publikováno v:
Advances in Mechanical Engineering, Vol 9 (2017)
A study on the contribution analysis of interior noise and floor vibration in high-speed trains was conducted using operational transfer path analysis. Initially, noise and vibration measurement at various locations on a high-speed train was conducte
Externí odkaz:
https://doaj.org/article/bf5860a9290c408daf201cdea0b31d2f