Sigma Limiting Effects on the Response of a Ceramic Matrix Beam
High sigma events were studied in the narrowband random response of a cantilevered beam excited by an electrodynamic shaker. The effects of truncating the input signal to the shaker with a BlackglasTM beam are discussed. Tests were conducted with the shaker option of the shaker controller sigma limi...
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| Veröffentlicht in: | Journal of aircraft 2002-11, Vol.39 (6), p.1067-1073 |
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| container_end_page | 1073 |
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| container_issue | 6 |
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| container_title | Journal of aircraft |
| container_volume | 39 |
| creator | Wolfe, Howard F Camden, Michael P Brown, Dansen L Simmons, Larry W |
| description | High sigma events were studied in the narrowband random response of a cantilevered beam excited by an electrodynamic shaker. The effects of truncating the input signal to the shaker with a BlackglasTM beam are discussed. Tests were conducted with the shaker option of the shaker controller sigma limiting turned off, sigma limited to 2.5, and sigma limited to 3.5. Large data files were recorded and analyzed. The results were compared with similar previous tests with an aluminum alloy beam. The sigma values calculated varied considerably with the record lengths. When a fatigue failure was assumed, the cumulative fatigue damage was computed as a function of the sigma value of the response peak probability density function. Very little damage was found for the high sigma peaks compared to the damage that occurred with the many smaller peaks. |
| doi_str_mv | 10.2514/2.3036 |
| format | Article |
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The effects of truncating the input signal to the shaker with a BlackglasTM beam are discussed. Tests were conducted with the shaker option of the shaker controller sigma limiting turned off, sigma limited to 2.5, and sigma limited to 3.5. Large data files were recorded and analyzed. The results were compared with similar previous tests with an aluminum alloy beam. The sigma values calculated varied considerably with the record lengths. When a fatigue failure was assumed, the cumulative fatigue damage was computed as a function of the sigma value of the response peak probability density function. Very little damage was found for the high sigma peaks compared to the damage that occurred with the many smaller peaks.</description><identifier>ISSN: 0021-8669</identifier><identifier>EISSN: 1533-3868</identifier><identifier>DOI: 10.2514/2.3036</identifier><identifier>CODEN: JAIRAM</identifier><language>eng</language><publisher>Reston, VA: American Institute of Aeronautics and Astronautics</publisher><subject>Aerodynamics ; Applied sciences ; Building materials. Ceramics. 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The effects of truncating the input signal to the shaker with a BlackglasTM beam are discussed. Tests were conducted with the shaker option of the shaker controller sigma limiting turned off, sigma limited to 2.5, and sigma limited to 3.5. Large data files were recorded and analyzed. The results were compared with similar previous tests with an aluminum alloy beam. The sigma values calculated varied considerably with the record lengths. When a fatigue failure was assumed, the cumulative fatigue damage was computed as a function of the sigma value of the response peak probability density function. Very little damage was found for the high sigma peaks compared to the damage that occurred with the many smaller peaks.</description><subject>Aerodynamics</subject><subject>Applied sciences</subject><subject>Building materials. Ceramics. Glasses</subject><subject>Ceramic industries</subject><subject>Chemical industry and chemicals</subject><subject>Exact sciences and technology</subject><subject>Fundamental areas of phenomenology (including applications)</subject><subject>General studies</subject><subject>Measurement and testing methods</subject><subject>Measurement methods and techniques in continuum mechanics of solids</subject><subject>Physics</subject><subject>Solid mechanics</subject><subject>Structural and continuum mechanics</subject><subject>Technical ceramics</subject><issn>0021-8669</issn><issn>1533-3868</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2002</creationdate><recordtype>article</recordtype><recordid>eNptkEtLAzEURoMoWKv-hqAobqbeJDOZ6Uq01AdUBB_rcJtJasq8TKZQ_71TW6gUV3dzON_hEnLKYMATFl_zgQAh90iPJUJEIpPZPukBcBZlUg4PyVEIcwDIIE175ObNzUqkE1e61lUzOrbW6DbQuqLtp6GvJjR1FQytLUU6Mh5Lp-kztt4t6Z3B8pgcWCyCOdncPvm4H7-PHqPJy8PT6HYSoRCijXLMYaoNstxgCjK2yKZCG8vyOLarXGMlTC3GTPOEay5kxgUmQ5bGljMNok8u197G118LE1pVuqBNUWBl6kVQPJVDCZnowLMdcF4vfNW1KQ6p5NA9YWvTvg7BG6sa70r034qBWj1RcbWq6sCLjQ2DxsJ6rLQLWzqOgclslXe15tAh_ln8tagmt8ouiqI1y7ZDz_9Dd4Z_ABfGh6A</recordid><startdate>20021101</startdate><enddate>20021101</enddate><creator>Wolfe, Howard F</creator><creator>Camden, Michael P</creator><creator>Brown, Dansen L</creator><creator>Simmons, Larry W</creator><general>American Institute of Aeronautics and Astronautics</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7TB</scope><scope>8FD</scope><scope>FR3</scope><scope>H8D</scope><scope>L7M</scope><scope>U9A</scope></search><sort><creationdate>20021101</creationdate><title>Sigma Limiting Effects on the Response of a Ceramic Matrix Beam</title><author>Wolfe, Howard F ; Camden, Michael P ; Brown, Dansen L ; Simmons, Larry W</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a333t-dad0bcea1dea7064fa1b3cef1d44f3036ef60bfa41c252c236823a59174f21c03</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2002</creationdate><topic>Aerodynamics</topic><topic>Applied sciences</topic><topic>Building materials. Ceramics. Glasses</topic><topic>Ceramic industries</topic><topic>Chemical industry and chemicals</topic><topic>Exact sciences and technology</topic><topic>Fundamental areas of phenomenology (including applications)</topic><topic>General studies</topic><topic>Measurement and testing methods</topic><topic>Measurement methods and techniques in continuum mechanics of solids</topic><topic>Physics</topic><topic>Solid mechanics</topic><topic>Structural and continuum mechanics</topic><topic>Technical ceramics</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Wolfe, Howard F</creatorcontrib><creatorcontrib>Camden, Michael P</creatorcontrib><creatorcontrib>Brown, Dansen L</creatorcontrib><creatorcontrib>Simmons, Larry W</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Mechanical & Transportation Engineering Abstracts</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Journal of aircraft</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Wolfe, Howard F</au><au>Camden, Michael P</au><au>Brown, Dansen L</au><au>Simmons, Larry W</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Sigma Limiting Effects on the Response of a Ceramic Matrix Beam</atitle><jtitle>Journal of aircraft</jtitle><date>2002-11-01</date><risdate>2002</risdate><volume>39</volume><issue>6</issue><spage>1067</spage><epage>1073</epage><pages>1067-1073</pages><issn>0021-8669</issn><eissn>1533-3868</eissn><coden>JAIRAM</coden><abstract>High sigma events were studied in the narrowband random response of a cantilevered beam excited by an electrodynamic shaker. The effects of truncating the input signal to the shaker with a BlackglasTM beam are discussed. Tests were conducted with the shaker option of the shaker controller sigma limiting turned off, sigma limited to 2.5, and sigma limited to 3.5. Large data files were recorded and analyzed. The results were compared with similar previous tests with an aluminum alloy beam. The sigma values calculated varied considerably with the record lengths. When a fatigue failure was assumed, the cumulative fatigue damage was computed as a function of the sigma value of the response peak probability density function. Very little damage was found for the high sigma peaks compared to the damage that occurred with the many smaller peaks.</abstract><cop>Reston, VA</cop><pub>American Institute of Aeronautics and Astronautics</pub><doi>10.2514/2.3036</doi><tpages>7</tpages></addata></record> |
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| ispartof | Journal of aircraft, 2002-11, Vol.39 (6), p.1067-1073 |
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| language | eng |
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| subjects | Aerodynamics Applied sciences Building materials. Ceramics. Glasses Ceramic industries Chemical industry and chemicals Exact sciences and technology Fundamental areas of phenomenology (including applications) General studies Measurement and testing methods Measurement methods and techniques in continuum mechanics of solids Physics Solid mechanics Structural and continuum mechanics Technical ceramics |
| title | Sigma Limiting Effects on the Response of a Ceramic Matrix Beam |
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