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Mishra, B. P.
- Vibro-Acoustics Analysis for Prediction of Disturbance/Noise in Machine Workshop
Abstract Views :289 |
PDF Views:4
Authors
Affiliations
1 Mech Dept, BEC, BBSR, IN
2 Mech Dept, GCE, Bhawanipatna, IN
1 Mech Dept, BEC, BBSR, IN
2 Mech Dept, GCE, Bhawanipatna, IN
Source
Technology Spectrum Review, Vol 1, No 1 (2016), Pagination: 7-14Abstract
A noise source can be very complex in nature. In noise control engineering an essential first step is to identify the strongest contributing noise sources. There are many tools available for predicting noise levels in industrial workrooms. These comprise simple theoretical formulae or empirical models as well as more complex methods of image or ray-tracing approaches. These more complex methods, such as the ray-tracing approaches, are proven prediction methods, but they involve considerable calculation times. Simple formulae and empirical models involve reduced computation times, at the cost of reduced performance.Keywords
Noise Sources, Octave Bands, Sound Propagation Curve.
References
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- Murray Hodgson, Experimental evolution of simplified models for predict ing noise levels in industrial workrooms, J. Acoust. Soc. Am., Volume 103, No. 4, 1933-1940 (1997).
- A Comparative Investigation to Process Parameter Optimization for Spot Welding Using Taguchi Based Grey Relational Analysis and Metaheuristics
Abstract Views :257 |
PDF Views:3
Authors
Affiliations
1 Department of Mechanical Engineering, Government College of Engineering, Kalahandi, Odisha, IN
2 Production Engineering Department, Veer Surendra Sai University of Technology, Burla, Odisha, IN
1 Department of Mechanical Engineering, Government College of Engineering, Kalahandi, Odisha, IN
2 Production Engineering Department, Veer Surendra Sai University of Technology, Burla, Odisha, IN
Source
Technology Spectrum Review, Vol 2, No 1 (2017), Pagination: 1-5Abstract
The present work investigate on parametric study and optimization of process parameter in resistance spot weld efficiency of chromate micro-alloyed cold rolled mild steel sheets using L25 Taguchi design of experiments. The output responses are being studied as tensile shear strength of the weldment and nugget diameter which is affected by the input variables like weld current, electrode force and weld time. Both output responses were optimized to achieve effective values by using conventional Taguchi based Grey Relational Analysis and a Metaheuristics method as Genetic Algorithm. Here in present work two main goals specifically tensile shear strength and nugget diameter simultaneously optimized using multi-objective genetic algorithm. The analytical results were validated with experimental run so to analyze the efficiency of methods.Keywords
Genetic Algorithm, Grey Relational Analysis, Orthogonal Array.References
- Y. J. Chao, “Ultimate strength and failure mechanism of resistance spot weld subjected to tensile, shear or combined tensile/shear loads,” Journal of Engineering Materials and Technology, vol. 125, pp. 125-132, April 2003.
- S. Ferrasse, P. Verrier, and F. Meesemaecker, “Resistance spot weldability of high strength steels for use in car industry,” Welding in the World, vol. 41, no. 3, pp. 177-195, 1998.
- S. Dancette, D. Fabregue, and V. Massardier, “Investigation of the tensile shear fracture of advanced high strength steel spot welds,” Engineering Failure Analysis, vol.25, pp. 112-122, 2012.
- C. Liang, and X. Liu, “Strength prediction of sheet to tube single sided resistance spot welding,” Materials and Design, vol. 30, pp. 4328-4334, 2009.
- P. C. Wang, and K. M. Ewing, “A comparison of fatigue strengths: Laser beam vs. resistance spot welds,” Welding Journal, vol. 70, pp. 43-47, 1991.
- K. Deb, “Multi-objective optimization using evolutionary algorithms,” Wiley-Interscience Series in Systems and Optimisation, New York, 2001.
- Thermodynamic and Hydrodynamic Analysis of Paddy Drying in a Bubbling Fluidized Bed Dryer
Abstract Views :245 |
PDF Views:7
Authors
Affiliations
1 Department of Mechanical Engineering, Bhubaneswar Engineering College, Bhubaneswar, Odisha, IN
1 Department of Mechanical Engineering, Bhubaneswar Engineering College, Bhubaneswar, Odisha, IN
Source
Technology Spectrum Review, Vol 2, No 2 (2017), Pagination: 12-14Abstract
Experimental investigation of paddy drying using vertical and inclined fluidized bed was carried out, using various inventories, inclinations, and air (passed through the blower, used for drying) temperatures. For the vertical bed, the drying times were found to be 80 min and 70 min for air temperatures 60°C and 65°C respectively, which is same for the bed with an inclination of 45°, given the same conditions. The bed with an inclination of 30° has the shortest drying time, i.e., 40 min for 65°C and 45 min for 60°C, thereby reducing the moisture content from 62% to 8.5%. 15° and 30° inclined beds consume the least energy due to better heat transfer and hydrodynamics, and less drying time.Keywords
Drying Time, Fluidization, Hydrodynamics, Moisture Content, Paddy.References
- P. P. Thant, P. S. Robi, and P. Mahanta, “Experimental investigation of cereal crop drying in an inclined bubbling fluidized bed,” 5th International & 26th All India Manufacturing Technology, Design and Research Conference (AIMTDR 2014), IIT Guwahati, Assam, India, 12-14 Dec. 2014,
- P. P. Thant, P. S. Robi, and P. Mahanta, “Effect of incline in an inclined bubbling fluidized bed paddy dryer,” International Journal of Scientific Engineering & Technology Research, vol. 4, pp. 1190-1196, 2015.
- D. Kunii, and O. Levenspiel, Fluidization Engineering, 2nd ed., Butterworth-Heinemann, Stoneham, 1991.
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