The dynamic stiffness  of resilient materials for floor impact sound according to temperature change

Junoh Yeon; Heemo Goo; Sungchan Lee

doi:10.7776/ASK.2018.37.5.338

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2018 Vol.37, Issue 5 Preview Page Next Page

Research Article

The dynamic stiffness of resilient materials for floor impact sound according to temperature change 온도변화에 따른 바닥충격음 완충재의 동탄성계수 변화

30 September 2018. pp. 338-342

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Abstract

In order to solve the floor impact sound problem in the upper and lower floors, the Ministry of Land, Transport and Maritime Affairs also notifies the physical properties of the resilient material affecting the floor impact sound level. The dynamic modulus of elasticity and the loss factor before and after heating are most related to the floor impact noise, especially for the cushioning material. Therefore, in this study, the rate of change with respect to the dynamic modulus and loss factor with temperature change was examined by increasing 10 °C by 10 °C from the temperature condition of 70 °C specified in the standard. The dynamic modulus of elasticity and the loss modulus were measured by using the pulse excitation method for eight kinds of samples. The calculation method was calculated by the time series analysis method using the damped vibration waveform.

Keywords

Resilient material

Dynamic stiffness

Loss factor

Nature frequency

상하층 간 공동주택의 바닥충격음 문제를 해결하기 위해 국토교통부에서는 바닥충격음 레벨에 영향을 미치는 완충재에 대한 물성 기준도 함께 고시하고 있다. 완충재에 대한 물성 기준중 가열전후 동탄성계수, 손실계수는 특히 바닥충격음과 가장 연관되어 있다. 따라서 본 연구에서는 기준에서 명시하고 있는 70 °C의 온도 조건을 기준으로 10 °C씩 증가시키고 10 °C씩 저감시켜 온도변화에 따른 동탄성계수 및 손실계수에 대하여 변화율을 검토하였다. 총 8가지 종류의 시료에 대하여 동탄성계수 및 손실계수 측정 방법은 펄스 가진법으로 수행되었으며 결과 산출방법은 감쇠 진동 파형을 이용한 시계열 해석법으로 산출하였다.

키워드

완충재

동탄성계수

손실계수

고유진동수

References

S. G. Cha, “The Management system and effect of floor noise at apartment houses,” Proc. the KSNVE Annual Autumn Conference, 693-697 (2014).

K. W. Kim, G. C. Jeong, and J. Y. Sohn, “ Correlation between dynamic stiffness of resilient materials and lightweight floor impact sound reduction level,” KSNVE, 18, 886-895 (2008).

10.5050/KSNVN.2008.18.8.886

K. W. Kim, H. J. Choi, J. S. Kang, and K. S. Yang, “A study on the property and influence factor in measuring of the dynamic stiffness of damping materials,” Proc. the KSNVE Annual Spring Conference, 1124-1127 (2006).

D. Choi, H. Kim, J. O, Yeon, and S. S. Moon, “A study on evaluation of physical properties according to construction & quality of floor impact noise insulators in apartment house,” Proc. the KSNVE Annual Spring Conference, 90 (2018).

G. G. Song, Y. H. Kim, and J. H. Park, “Method for dimensional stability measurement of resilient materials used under floating floors,” Proc. the KSNVE Annual Spring Conference, 239 (2018).

KS F 2868: Determination of dynamic stiffness of materials used under floating floors in dwellings (2003).

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Information

Publisher :The Acoustical Society of Korea
Publisher(Ko) :한국음향학회
Journal Title :The Journal of the Acoustical Society of Korea
Journal Title(Ko) :한국음향학회지
Volume : 37
No :5
Pages :338-342
Received Date : 2018-07-24
Accepted Date : 2018-09-17
DOI :https://doi.org/10.7776/ASK.2018.37.5.338

The Journal of the Acoustical Society of KoreaISSN:1225-4428(Print) 2287-3775(Online)한국음향학회

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