Conference Papers

Permanent URI for this collectionhttps://idr.nitk.ac.in/handle/123456789/28506

Browse

Author: search.filters.author.Huang, H.Has files: No

Search Results

Now showing 1 - 2 of 2
  • No Thumbnail Available
    Item
    Development of Region-Specific New Generation Attenuation Relations for North India Using Artificial Neural Networks
    (Springer Science and Business Media Deutschland GmbH, 2021) Huang, H.; Ramkrishnan, R.; Kolathayar, S.; Garg, A.; Yadav, J.S.
    Present study focuses on developing region-specific New Generation Ground Motion Prediction Models using Artificial intelligence technique for North India purely based on a measured ground motion data from specific region. Simple single hidden layered feed forward multilayer perceptron networks with back-propagation learning algorithm are used. A total of 280 data points of recorded strong motion data from the Kangra and Uttar Pradesh (UP) arrays, made available by the Program for Excellence in Strong Motion Studies (PESMOS), were used to train these networks. The first model predicts Moment Magnitude for a given Hypocentral Distance and Peak Ground Acceleration. The second model predicts Peak Ground Acceleration (PGA) for a given Hypocentral Distance (HPD) and Moment Magnitude (MM). Performance analysis, Uncertainty analysis and analysis of interactive effects have been done to test the reliability of the generated models. Optimization analysis was also performed to predict possible inputs of the models for a given set of outputs. Models have performed reasonably well for the given amount of non-linearity in the data. © 2021, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.
  • No Thumbnail Available
    Item
    Anti-corrosion treatment for bearing steel
    (American Institute of Physics Inc., 2021) Chawla, S.; Larsson, S.; Huang, H.; Hegde, S.
    The rolling bearing is one of the key components for the functioning of sophisticated machinery in the demanding industrial world today. For efficient and smooth operation, bearings need to sustain wear, fatigue, high loads, and sometimes, heat and harsh environments. Preceding failure analysis of the current work concluded that the recurring failure of the bearings under consideration is predominantly caused by the excessive wearing of the bearing track, and false brinelling due to harsh corrosive environment. This work, as a remedial measure, aims at enhancing the bearing life by suitably applying nitrocarburizing, a thermochemical heat treatment, to bearing parts. By heat treatment, nitrogen and carbon are diffused in hardened bearing races and rolling elements at a relatively lower temperature of 560-580 °C followed by controlled oxidation. Structural transformation during the process formed a compound layer at the sub-surface consisting of s-Fe2-3(N, C) and y'-Fe4(N, C) phases and a thin continuous layer of Fe3O4 on the compound layer as confirmed by X-Ray diffraction and microstructural analysis. Microhardness profile confirmed progressively declining hardness from the surface towards the core. Salt spray tests performed on the nitrocarburized parts indicated excellent corrosion-resistance properties. © 2021 Author(s).