Water Hammer Analysis and Parameter Estimation in Polymer Pipes with Weak Strain-Rate Feedback
| Autor: | E. Yao, D. Hansen, G. Kember |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Water hammer
Engineering Scale (ratio) business.industry Estimation theory Mechanical Engineering Attenuation 0208 environmental biotechnology Experimental data 02 engineering and technology Mechanics Strain rate Viscoelasticity 020801 environmental engineering Mechanics of Materials Control theory business Scaling |
| Zdroj: | Journal of Engineering Mechanics. 142 |
| ISSN: | 1943-7889 0733-9399 |
| DOI: | 10.1061/(asce)em.1943-7889.0001104 |
| Popis: | A closed-form, multiple-scales, analytic approximation of a Kelvin-Voight viscoelastic model is developed to describe water hammer pressure wave attenuation in polymer pipe. The analytical results show that the evolution of water hammer for the single-pipe experiment considered in this paper is described by the Kelvin-Voight model as a weak strain-rate feedback occurring over three timescales. The wave transit and frictional timescales are augmented by a third intermediate timescale governed by the weakness of the strain-rate feedback. The scaling analysis also shows that, for weak strain-rate feedback, it is possible to use an optimization approach to estimate the scale of Kelvin-Voight parameters without experimental data. The optimal choice for weakness of the strain-rate feedback also determines the extent to which a weak strain-rate feedback description may be appropriate to describe an experimental design. |
| Databáze: | OpenAIRE |
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