<?xml version="1.0" encoding="utf-8"?>
<export-example>
  <doc>
    <id>974</id>
    <completedYear>2008</completedYear>
    <publishedYear/>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>conferenceobject</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Spatial variation of the point mobility of a timber joist floor</title>
    <parentTitle language="deu">DAGA 2008, Deutsche Jahrestagung für Akustik, Dresden.</parentTitle>
    <author>Andreas Mayr</author>
    <author>Barry Gibbs</author>
    <author>Heinz Martin Fischer</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Point mobility</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Timber joist floor</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Spatial variation</value>
    </subject>
    <collection role="ddc" number="53">Physik</collection>
    <collection role="institutes" number="">Fakultät für Angewandte Natur- und Geisteswissenschaften</collection>
    <thesisPublisher>Technische Hochschule Rosenheim</thesisPublisher>
  </doc>
  <doc>
    <id>980</id>
    <completedYear>2009</completedYear>
    <publishedYear/>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>conferenceobject</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">On force- and moment mobilities of a timber joist floor</title>
    <abstract language="eng">In wood framed buildings, floors are formed by fastening wood sheathing to joists spaced at a regular interval. The sheathing is typically fastened to the joist using screws so the resulting system is a complicated periodic point-connected plate-rib structure. It is shown that the point force mobility varies significantly with position. A machine installation generally is close to discontinuities, such as at: floor edges, joist-screw locations, joints between the sheathing plates, and due to workmanship. In such cases, moment excitation might become important at some frequencies and the neglect of moments a priori can ead to inaccurate prediction of the total emission. This paper presents measured point moment mobilities with respect to the distance to discontinuities for a timber joist floor where a single layer of chipboard forms the sheathing. It is shownthat the measured point moment mobility indicates an infinite plate behaviour. This includes for positions above a joist but between screw positions. To determine the relative contribution of moments and perpendicular forces to the total structure-borne sound power, case studies of two sources, a fan unit and a whirlpool bath, are described, for various locations on a timber joist floor.</abstract>
    <parentTitle language="eng">35th German Annual Conference on Acoustics (DAGA), Rotterdam, March 2009.</parentTitle>
    <author>Andreas R. Mayr</author>
    <author>Barry Gibbs</author>
    <author>Heinz Martin Fischer</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Force- and moment mobilities</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Timber joist floor</value>
    </subject>
    <collection role="ddc" number="53">Physik</collection>
    <collection role="institutes" number="">Fakultät für Angewandte Natur- und Geisteswissenschaften</collection>
    <thesisPublisher>Technische Hochschule Rosenheim</thesisPublisher>
  </doc>
</export-example>
