| Three bias errors in the measurement of structural intensity |
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| 作者姓名： | MING Ruisen |
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| 作者单位： | Department of Architecture，Zhejiang University Hangzhou 310027 |
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| 摘 要： | I.IntroductionTheabilityofstructuralintensitytechniquetomeasureboththemagnitudeanddirectionofpowerflowmakesitanattractivetechniqueforinvestigatingawidevarietyofstructures.However,intensitymeasurementtechniqueispronetoerrors.Theseerrorsdependonthepropertiesofthestructurebeingmeasured,thetypeofwavespresefltedonthestructureandtheinstrumentationusedtomeasuretheintensity.Theerrorscanbeclassifiedasrandomerrorsandbiaserrors.Randomerrorscannotbecalculatedexactlyinanycasesandcouldresultinoverorunderes…
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Three bias errors in the measurement of structural intensity |
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| Authors: | MING Ruisen |
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| Abstract: | There are many possible bias errors in the measurement of structural intensity and some of them have been theoretically examined. Attempting to analyse all the bias errors at the same time results in a very complicated analysis and makes it difficult to draw clear conclusions.The bias errors are usually analysed individually. In this paper a theoretical study of three bias errors in the measurement of structural intensity is presented by using the twor-accelerometer array technique. It is assumed that the physical and material properties of the test structure are known. The analysis will be restricted to one-dimensional beams, but it can be extended to two-dimensional plates. |
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| Keywords: | Structural intensity Two-accelerometer array technique Bias error |
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