• 제목/요약/키워드: resilient materials

검색결과 133건 처리시간 0.024초

완충재 구성방법에 따른 동탄성계수 및 중량바닥충격음 저감특성 평가 (Evaluation of the Dynamic Stiffness and Heavy-weight Floor Impact Sound Reduction by Composition of Resilient Materials)

  • 김경우;정갑철;손장열
    • 한국소음진동공학회논문집
    • /
    • 제18권2호
    • /
    • pp.247-254
    • /
    • 2008
  • Resilient materials are generally used for the floating floors to reduce the floor impact sound. Dynamic stiffness of resilient material, which has the most to do with the floor impact sound reduction. The resilient materials available in Korea include EPS(styrofoam), recycled urethane types, EVA(ethylene vinylacetate) foam rubber, foam PE(polyethylene). glass fiber & rock wool, recycled tire, foam polypropylene. compressed polyester, and other synthetic materials. In this study, we tested dynamic stiffness of resilient material and floor impact sound reduction characteristic to a lot of kinds of resilient materials. It was found that dynamic stiffness of multi-layered damping material could be estimated if know value of each layer that compose whole structure. And the test showed that the amount of the heavy-weight impact sound reduction appeared by being influenced from this dynamic stiffness of resilient material. The dynamic stiffness looked like between other resilient materials, a similar to the amount of the heavy-weight impact sound reduction was shown.

완충재 종류에 따른 중량바닥충격음 저감특성 평가 (A Study on the Heavy-weight Floor Impact Sound Reduction Evaluation of Characteristics by Resilient Materials)

  • 김경우;양관섭;정진연;임정빈;정갑철
    • 한국소음진동공학회:학술대회논문집
    • /
    • 한국소음진동공학회 2007년도 추계학술대회논문집
    • /
    • pp.1145-1148
    • /
    • 2007
  • Resilient materials are generally used for the floating floors to reduce the floor impact sound. Dynamic stiffness of resilient material, which has the most to do with the floor impact sound reduction. The resilient materials available in Korea include EPS (Styrofoam), recycled urethane types, EVA (Ethylene Vinylacetate) foam rubber, foam PE (Polyethylene), glass fiber & rock wool, recycled tire, foam polypropylene, compressed polyester, and other synthetic materials. In this study, we tested floor impact sound reduction characteristic to a lot of kinds of resilient material. The result of test showed that the amount of the heavy-weight impact sound reduction appeared by being influenced from this dynamic stiffness of resilient material. The dynamic stiffness looked like between other resilient materials, a similar to the amount of the heavy-weight impact sound reduction was shown.

  • PDF

완충재 동탄성계수와 경량바닥충격음 저감량의 상관성 (Correlation Between Dynamic Stiffness of Resilient Materials and Lightweight Floor Impact Sound Reduction Level)

  • 김경우;정갑철;손장열
    • 한국소음진동공학회논문집
    • /
    • 제18권8호
    • /
    • pp.886-895
    • /
    • 2008
  • Resilient materials are generally used for the floating floors to reduce the floor impact sound. Dynamic stiffness of resilient material have a close relation with the floor impact sound reduction. In this study, to examine the relationship between dynamic stiffness and lightweight impact sound level, the dynamic stiffness and floor impact sound level of 51 resilient materials were measured. The impact sound level of each of these resilient materials, whose dynamic stiffness was measured, was measured before and after installation, and the level difference (${\Delta}L$) was analyzed. The result of test showed that the dynamic stiffness of resilient materials decreased, the lightweight impact sound level also decreased, and there was a correlation between the dynamic stiffness and the lightweight impact sound, especially in the low frequency domain.

Evaluation of Static Spring Constant and Accelerated Life Prediction for Compression Set of Polyurethane Resilient Pad in Rail Fastening System

  • Lee, Seung-Won;Park, Jun-Young;Park, Eun-Young;Ryu, Sung-Hwan;Bae, Seok-Hu;Kim, Nam-Il;Yun, Ju-Ho;Yoon, Jeong-Hwan
    • Elastomers and Composites
    • /
    • 제53권4호
    • /
    • pp.220-225
    • /
    • 2018
  • Resilient pads play a major role in reducing the impact of loads on a rail in a rail-fastening system, which is essentially used for a concrete track. Although a compression set test is commonly used to measure the durability of a resilient pad, the static spring constant is often observed to be different from the fatigue test. In this study, a modified compression set test method was proposed to monitor the variations in the compression set and static spring constant of a resilient pad with respect to temperature and time. In addition, the life of the resilient pad was predicted by performing an acceleration test based on the Arrhenius equation.

완충재 종류에 따른 경량바닥충격음 저감특성 평가 (Evaluation of the Light-weight Floor Impact Sound Reduction Characteristics by Types of Resilient Material)

  • 김경우;양관섭;정진연;임정빈;정갑철
    • 한국소음진동공학회:학술대회논문집
    • /
    • 한국소음진동공학회 2008년도 춘계학술대회논문집
    • /
    • pp.830-834
    • /
    • 2008
  • Resilient materials are generally used for the floating floors to reduce the floor impact sound. Dynamic stiffness of resilient material, which has the most to do with the floor impact sound reduction. The resilient materials available in Korea include EPS (Styrofoam), recycled urethane types, EVA (Ethylene Vinylacetate) foam rubber, foam PE (Polyethylene), glass fiber & rock wool, recycled tire, foam polypropylene, compressed polyester, and other synthetic materials. In this study, we tested floor impact sound reduction characteristic to a lot of kinds of resilient material. The result of test showed that the amount of the Light-weight impact sound reduction appeared by being influenced from this dynamic stiffness of resilient material. As the decreasing dynamic stiffness of resilient material, the impact sound reduction amount is increased, especially in the low frequency domain.

  • PDF

완충재의 시공결함과 경량충격음 편차에 관한 사례 연구 (A Case Study of the Relationship between the Defects of resilient materials and the deviation of Light-weight Floor Impact Noise)

  • 성요한;김진식;김혜원;조성준
    • 한국건축시공학회:학술대회논문집
    • /
    • 한국건축시공학회 2023년도 가을학술발표대회논문집
    • /
    • pp.137-138
    • /
    • 2023
  • The floating floor is a structure which introduced to reduce the noise of apartment houses. This structure can decrease vibration energy through resilient materials. However, it is limited to completely construct resilient materials in South Korea due to floor heating structure and other reasons. And It is a controversial issue how well the resilient materials should be constructed to prevent floor impact noise. These resilient defect areas are typically found in wall corners, door sills, hot water dispenser in kitchen and areas where thermal insulation is attached. This study investigates the acoustical effect of the defect areas in two ways. First, it is analyzed by several assumption conditions and calculated how much deviation would occur. Then we researched the deviation of the 76 field test data about light-weight floor impact noise. This study could be useful for a constructor to determine how much should minimize resilient materials defect areas.

  • PDF

도로기초 지반재료의 회복변형 및 응력의존 예측 (Prediction of Resilient Deformation and Stress-Dependent Behaviors on Geomaterials in Pavement Foundation)

  • 박성완;황규영
    • 한국도로학회논문집
    • /
    • 제10권1호
    • /
    • pp.63-74
    • /
    • 2008
  • 교통하중하의 포장구조체에 대한설계나 비선형해석에 있어 도로하부재료의 회복변형특성이 활용되고 있으나 국내에서는 관련연구가 매우 미진한 실정이다. 또한 매우 제한적인 범위의 자료만이 회복탄성계수를 추정하는데 활용되고 있어 본 연구에서는 도로기초 지반재료인 보조기층과 노상토를 대상으로 비선형특성을 파악하기 위한 반복재하 회복탄성계수 시험을 실시하였다. 또한 이를 토대로 응력조건을 고려한 회복탄성계수 예측모델과 적합한 응력의존 모델을 결정하고 이를 이용하여 유한요소 해석방법을 활용하여 포장체 및 도로하부 지반재료에 대한 거동을 파악하였다.

  • PDF

완충재 장기처짐과 ISO 20392 대응 연구 (Correspondence Research of Long-term Compressive Creep of Resilient Materials and ISO 20392)

  • 김경우;연준오;양관섭
    • 한국소음진동공학회논문집
    • /
    • 제22권12호
    • /
    • pp.1250-1256
    • /
    • 2012
  • Resilient materials are used to reduce the floor impact sound in apartment buildings. Since an on-dol layer is installed in the resilient materials' upper part, thickness deformation can be occur in the resilient material. It is necessary to check a thickness deformation grade for a long period of time. In this research, we measured thickness deformation over 400th day to the resilient materials(EPP, EPS, EVA) which is used in Korea. Although there was a difference according to the kind of measurement test specimens, it became clear that thickness was decreases as to time increased. The thickness deformation grade of ten years after was calculated based on the thickness measurement result. Compare with the calculated result and result of ISO 20392. Larger thickness deformation occurred in the measurement result of these research findings compare with the ISO standard.

완충층 조합에 따른 바닥충격음 차단성능 변화 사례연구 -T사의 사례를 중심으로- (A Case Study on the Floor Impact Sound Insulation Characteristics due to Resilient Layer Compositions - Focused in T company's products -)

  • 신훈;백건종;송민정;장길수
    • 한국소음진동공학회:학술대회논문집
    • /
    • 한국소음진동공학회 2008년도 춘계학술대회논문집
    • /
    • pp.13-16
    • /
    • 2008
  • Floor impact sound insulation performance of floor resilient materials produced by T company were tested in T company's lab. The results of this study can be summarized as follows. 1) Thickness changes of materials or arrangement order of materials are not much influential in floor impact sound insulation performance. 2) PS sheet and PP sheet upper part location is optimal association in reducing sound at low frequencies. 3) Composition of different form resilient materials' performance is better than that of similar form composition's.

  • PDF

반복하중을 받는 입상재료의 회복탄성거동에 관한 구성모델 (Constitutive Modeling for Resilient Behavior of Granular Materials under Repeated Loading)

  • 이석근
    • 대한토목학회논문집
    • /
    • 제14권4호
    • /
    • pp.827-838
    • /
    • 1994
  • 많은 포장구조 거동 모델은 입상재료의 거동을 묘사하는 구성방정식에 의존하고 있다. 본 연구에서는 비행장 포장의 입상재료 기층의 거동 예측을 위하여, 체적응력(bulk stress)과 팔면체 전단응력(octahedral shear stress)의 함수로 표시된 구성모델이 제안되었다. 이 모델의 특징은 비선형거동을 정확히 예측할 수 있고, 모델상수를 간단히 구할 수 있으며 전단효과에 의한 회복탄성계수의 감소현상을 나타낼 수 있다. 실내시험을 통하여 입상재료의 비선행 회복탄성거동을 관찰하였으며, 제안된 모델을 입증하기 위해 회복탄성계수를 측정하였다. 체적응력과 축차응력이 회복탄성계수의 변화에 가장 주요한 변수임이 관찰되었으며, 실내시험 결과 제안된 모델식에 의한 회복탄성계수의 예측치가 실측치와 잘 일치함을 알 수 있었다. 따라서 제안된 모델식은 비행장 포장에서 일어날 수 있는 광범위한 응력조건하의 입상재료의 회복탄성거동을 잘 묘사할 수 있음을 알 수 있다.

  • PDF