The Experts below are selected from a list of 294 Experts worldwide ranked by ideXlab platform

Zhifei Zhang - One of the best experts on this subject based on the ideXlab platform.

  • Sound Transmission loss characteristics of four side simply supported sandwich panels
    Journal of Sandwich Structures and Materials, 2019
    Co-Authors: Zhifei Zhang
    Abstract:

    In this study, a theoretical investigation on the Sound Transmission loss characteristics of four-side simply supported sandwich panels considering the flexural rigidity of the face sheet has been presented. With the flexural rigidity of the face sheet taken into account, the Sound Transmission problem of the sandwich panels is derived from the governing equation of bending vibration. The Sound Transmission loss expression is also derived. The validation of the theoretical prediction model is validated by comparing with the high-accuracy finite element and boundary element simulation. Numerical analysis shows that the flexural rigidity of face sheet influences the natural frequencies obviously, and the theoretical prediction model proposed has high accuracy on predicting the natural frequencies and Sound Transmission loss of four-side simply supported sandwich panels. The effects of the face sheet flexural rigidity, the thickness of face sheets and core layer, as well as the damping coefficient of the cor...

  • Sound Transmission loss characteristics of four-side simply supported sandwich panels:
    Journal of Sandwich Structures & Materials, 2017
    Co-Authors: Zhifei Zhang
    Abstract:

    In this study, a theoretical investigation on the Sound Transmission loss characteristics of four-side simply supported sandwich panels considering the flexural rigidity of the face sheet has been presented. With the flexural rigidity of the face sheet taken into account, the Sound Transmission problem of the sandwich panels is derived from the governing equation of bending vibration. The Sound Transmission loss expression is also derived. The validation of the theoretical prediction model is validated by comparing with the high-accuracy finite element and boundary element simulation. Numerical analysis shows that the flexural rigidity of face sheet influences the natural frequencies obviously, and the theoretical prediction model proposed has high accuracy on predicting the natural frequencies and Sound Transmission loss of four-side simply supported sandwich panels. The effects of the face sheet flexural rigidity, the thickness of face sheets and core layer, as well as the damping coefficient of the core on the Sound Transmission loss are systematically investigated.

R A Mcphee - One of the best experts on this subject based on the ideXlab platform.

  • Sound Transmission class and fire resistance ratings for wood frame floors
    Fire and Materials, 2000
    Co-Authors: L R Richardso, R A Mcphee, M Atista
    Abstract:

    A collaborative government-industry research programme was carried out at the National Research Council Canada to develop new Sound-Transmission classes and fire-resistance ratings for wood-frame floor assemblies protected by gypsum-board ceilings. Forintek Canada Corp., the Canadian Wood Council, and five manufacturers of wood I-joists participated in the programme on behalf of the wood industry. Fire-resistance ratings developed through the research programme range from 30 min to 1 h: Sound-Transmission classes range from 20 to 65. Many of the ratings will be published in the next edition of the National Building Code of Canada. This paper highlights some of those Sound-Transmission class and fire-resistance ratings and describes how they mere derived from data obtained through the research programme.

  • fire resistance and Sound Transmission class ratings for wood frame walls
    Fire and Materials, 1996
    Co-Authors: L R Richardso, R A Mcphee
    Abstract:

    A collaborative industry-government research program was carried out at the National Research Council Canada (NRC) to develop new Sound-Transmission-class and fire-resistance ratings for gypsum-board protected walls. Forintek Canada Corp. and the Canadian Wood Council participated in the program on behalf of Canada's wood industry. As a result of that NRC research program, Sound-Transmission-class (STC) and fire-resistance (FR) ratings were formulated for approximately 140 gypsum-protected wood-frame walls. Fire-resistance ratings for the walls range from 30 minutes to 2 hours. Sound-Transmission-class ratings range from 30 to 65. Sound-Transmission-class and fire-resistance ratings for approximately 90 of the wall designs appear in tbe 1995 edition of the National Building Code of Canada (NBCC). This paper highlights some of those STC and FR ratings and describes how they were derived from the data obtained through the research program.

  • Fire‐resistance and Sound‐Transmission‐class Ratings for Wood‐frame Walls
    Fire and Materials, 1996
    Co-Authors: L. R. Richardson, R A Mcphee
    Abstract:

    A collaborative industry-government research program was carried out at the National Research Council Canada (NRC) to develop new Sound-Transmission-class and fire-resistance ratings for gypsum-board protected walls. Forintek Canada Corp. and the Canadian Wood Council participated in the program on behalf of Canada's wood industry. As a result of that NRC research program, Sound-Transmission-class (STC) and fire-resistance (FR) ratings were formulated for approximately 140 gypsum-protected wood-frame walls. Fire-resistance ratings for the walls range from 30 minutes to 2 hours. Sound-Transmission-class ratings range from 30 to 65. Sound-Transmission-class and fire-resistance ratings for approximately 90 of the wall designs appear in tbe 1995 edition of the National Building Code of Canada (NBCC). This paper highlights some of those STC and FR ratings and describes how they were derived from the data obtained through the research program.

Malcolm J. Crocker - One of the best experts on this subject based on the ideXlab platform.

  • Sound Transmission Characteristics of Asymmetric Sandwich Panels
    Journal of Vibration and Acoustics, 2010
    Co-Authors: Ran Zhou, Malcolm J. Crocker
    Abstract:

    Governing equations for the forced vibration of asymmetric sandwich panels are developed from energy relationships. A wave impedance analysis model for the Sound Transmission loss of asymmetric sandwich panels is presented. The wave impedance analysis model is compared with other wave impedance analysis models for sandwich panels. Comparisons between predictions of the Sound Transmission loss of two sandwich panels obtained from two wave impedance analysis models for asymmetric sandwich panels are given.

  • Boundary element analyses for Sound Transmission loss of panels.
    The Journal of the Acoustical Society of America, 2010
    Co-Authors: Ran Zhou, Malcolm J. Crocker
    Abstract:

    The Sound Transmission characteristics of an aluminum panel and two composite sandwich panels were investigated by using two boundary element analyses. The effect of air loading on the structural behavior of the panels is included in one boundary element analysis, by using a light-fluid approximation for the eigenmode series to evaluate the structural response. In the other boundary element analysis, the air loading is treated as an added mass. The effect of the modal energy loss factor on the Sound Transmission loss of the panels was investigated. Both boundary element analyses were used to study the Sound Transmission loss of symmetric sandwich panels excited by a random incidence acoustic field. A classical wave impedance analysis was also used to make Sound Transmission loss predictions for the two foam-filled honeycomb sandwich panels. Comparisons between predictions of Sound Transmission loss for the two foam-filled honeycomb sandwich panels excited by a random incidence acoustic field obtained from the wave impedance analysis, the two boundary element analyses, and experimental measurements are presented.

L R Richardso - One of the best experts on this subject based on the ideXlab platform.

  • Sound Transmission class and fire resistance ratings for wood frame floors
    Fire and Materials, 2000
    Co-Authors: L R Richardso, R A Mcphee, M Atista
    Abstract:

    A collaborative government-industry research programme was carried out at the National Research Council Canada to develop new Sound-Transmission classes and fire-resistance ratings for wood-frame floor assemblies protected by gypsum-board ceilings. Forintek Canada Corp., the Canadian Wood Council, and five manufacturers of wood I-joists participated in the programme on behalf of the wood industry. Fire-resistance ratings developed through the research programme range from 30 min to 1 h: Sound-Transmission classes range from 20 to 65. Many of the ratings will be published in the next edition of the National Building Code of Canada. This paper highlights some of those Sound-Transmission class and fire-resistance ratings and describes how they mere derived from data obtained through the research programme.

  • fire resistance and Sound Transmission class ratings for wood frame walls
    Fire and Materials, 1996
    Co-Authors: L R Richardso, R A Mcphee
    Abstract:

    A collaborative industry-government research program was carried out at the National Research Council Canada (NRC) to develop new Sound-Transmission-class and fire-resistance ratings for gypsum-board protected walls. Forintek Canada Corp. and the Canadian Wood Council participated in the program on behalf of Canada's wood industry. As a result of that NRC research program, Sound-Transmission-class (STC) and fire-resistance (FR) ratings were formulated for approximately 140 gypsum-protected wood-frame walls. Fire-resistance ratings for the walls range from 30 minutes to 2 hours. Sound-Transmission-class ratings range from 30 to 65. Sound-Transmission-class and fire-resistance ratings for approximately 90 of the wall designs appear in tbe 1995 edition of the National Building Code of Canada (NBCC). This paper highlights some of those STC and FR ratings and describes how they were derived from the data obtained through the research program.

R J M Craik - One of the best experts on this subject based on the ideXlab platform.

  • The consequences of lightweight buildings on Sound Transmission
    Building Services Engineering Research and Technology, 1998
    Co-Authors: R J M Craik
    Abstract:

    Changes in building practise have led to an increased use of lightweight components in modem buildings. Lightweight walls and floors do not rely on mass to prevent Sound Transmission but on the way in which the various components with different material properties are combined. This requires a knowledge of both the materials used and the details of construction. The traditional approach to design is to compare the proposed construction with measured data from similar systems. However, the possible range of lightweight designs makes this impractical. Theoretical models offer an alternative approach to design and are becoming increasingly important for Sound Transmission in buildings.

  • Sound Transmission through buildings using statistical energy analysis
    1996
    Co-Authors: R J M Craik
    Abstract:

    Getting started - a tutorial introduction modelling with statistical energy analysis subsystem properties coupling loss factors structure-borne Sound Transmission calculating performance using SEA applications - direct Transmission applications - flanking Transmission.