Modeling of Air-Water Filled Rubber Dam Under Hydrostatic Conditions | ||
| Engineering and Technology Journal | ||
| Article 28, Volume 39, Issue 12, December 2021, Pages 1976-1987 PDF (1.64 M) | ||
| Document Type: Research Paper | ||
| DOI: 10.30684/etj.v39i12.1968 | ||
| Authors | ||
| Qusay S. Khaleel* 1; Thair S. Khayyun2; Khudhayer N. Abdullah3 | ||
| 1Civil Engineering Dept., University of Technology-Iraq, Alsina’a street,10066 Baghdad, Iraq. | ||
| 2Abdullah Civil Engineering Dept., University of Technology-Iraq, Alsina’a street,10066 Baghdad, Iraq. | ||
| 3Abdullah Civil Engineering Dept., University of Technology-Iraq, Alsina’a street,10066 Baghdad, Iraq | ||
| Abstract | ||
| Inflatable dams, also called rubber dams, are flexible cylindrical inflatable and deflatable structures attached to a rigid base; these dams are basically cylindrical tubes made of rubberized material and inflated by air, water, or a combination of the two. In this paper, the air/water inflatable dam was studied and analyzed numerically using ANSYS software. The 3-parameter Mooney-Rivlin Model was used to model the rubber material of the dam. At first, a physical model from literature was used to calibrate the results of the ANSYS software, and then a new model was analyzed with different dimensions and conditions. Thirty-six simulations were made using the ANSYS software to calibrate the software, based on experimental results from the literature. The simulations achieved a very low error rate compared to the experimental findings, with a maximum error rate of 1.45 percent. After that, a new air/water-filled dam model simulation was carried out. The new inflatable dam was analyzed with large dimensions that can be used to reserve water at high elevations. Several water heights (2, 4, 6, 8, and 10 m) were used as input at the upstream of the dam, and their effect on the dam body was verified on the assumption that there was no water downstream of the dam for all simulations. The height of the used inflatable dam was assumed to be 11 meters (first 5.5 m water pressure and the second 5.5m different air pressure values), and the bottom gaskets was 9.7 meters wide. It is evident from the analysis that the upstream water appears to push the dam to the right side (towards downstream), causing a change in dam equilibrium shape. The difference in the cross-sectional equilibrium profile of the dam is due to the change in air and water pressures on the element. Thus, it changes the tension and slope of the dam membrane elements. The simulation results showed that the membrane tension increases as the upstream head increases, and as the internal pressure increases, the tension increases. This rise in tension as the upstream head rises may be due to the rise in the forces on the element, and hence the membrane tension increases. | ||
Highlights | ||
The dam height rises as the upstream head rises with all cases of internal pressure | ||
| Keywords | ||
| Rubber Dam; NUMERICAL SIMULATION; ANSYS software; Mooney-Rivlin models | ||
| References | ||
|
[1] G. Michael, On the hydraulic and structural design of fluid and gas filled inflatable dams to control water flow in rivers. In: E. Oñate, B. Kröplin and K.-U.Bletzinger (Hg.),5th Conference on Textile Composites and Inflatable Structures.,Barcelona, Spain, 2011. [2] G. Michael, M. Maisner, and G. Ulrike, Inflatable dams - Prospects for the use of flexible gates Advantages and application range - Hydraulic and structural design - Requirements for materials - Initial experience on Federal waterways, 31st PIANC CONGRESS., Estoril, Portugal, 2006. [3] K. K., El-Jumaily, and A. A Salih, Analysis of inflatable dams under hydrostatic conditions Journal of Engineering and Development, Baghdad, Iraq, 2005. [4] A. Maurer, M.Hassler, and K. Schweizerhof, Modeling of inflatable dams partially filled with fluid and gas considering large deformations and stability, International Conference on Textile Composites and Inflatable Structures, Structural Membranes, Barcelona, Spain,2009. [5] R. Gurt, Design and analysis of reinforced rubber membranes for inflatable dams,proceedings of the 7th International Conference on Textile Composites and Inflatable Structures, Barcelona, Spain, 2015. [6] M. Lombard, Mastering SolidWorks, John Wiley & Sons, 1st ed.,Australia, 2018. [7] T.Saussman, and Bathe R.S., A Finite Element Formulation for Nonlinear Elastic and inelastic Analysis,Journal of Computers and Structures, 1987, 357- 409 . [8] Standard test methods for flexural properties of unreinforced and reinforced plastics and electrical insulating materials, ASTM D790, ASTM Standards, 1997. [9] H. Lobo, President, and B. Croop, Testing, Modeling, and Validation for Rubber Simulation in ANSYS,presented at the short course prepared for the Western Pennsylvania ANSYS User's Group Fall Workshop, Canonsburg, USA, 2016. [10] SolidWorks, Solid Works 2018 user manual. [11] Ansys Software18.2, Ansys workbench18.2user manual. [12] Alpha Rubber & Plastic Company, http://www.alpha06.com/
| ||
|
Statistics Article View: 237 PDF Download: 204 |
||