http://localhost:8080/xmlui/handle/123456789/2657 2026-06-23T06:32:02Z http://localhost:8080/xmlui/handle/123456789/2941 Title: Two lobe non-recessed roughened hybrid journal bearing – A comparative study Authors: Sharma, S. C.; Kushare, P. B. Abstract: The present paper examines the influence of surface roughness on the performance of two lobe hybrid journal bearing. The performance characteristics of two lobe journal bearings compensated with different types of flow control devices such as orifice, capillary, constant flow valve and slot restrictors, have been presented for different forms of roughness patterns such as transverse, longitudinal, isotropic and smooth surface. The results of the study indicate that roughness orientation significantly affects the performance of bearing system. Further, results indicates that, a proper selection of roughness pattern parameter, offset factor and compensating device is essential to enhance the bearing performance. 2014-11-15T00:00:00Z http://localhost:8080/xmlui/handle/123456789/2880 Title: OPTIMAL SEQUENCE OF HOLE-MAKING OPERATIONS USING PARTICLE SWARM OPTIMISATION AND SHUFFLED FROG LEAPING ALGORITHM Authors: Dalavi, A. M.; Pawar, P. J.; Singh, T. P. Abstract: Tool travel and tool switch scheduling are two major issues in hole-making operations. It is necessary to find the optimal sequence of operations to reduce the total processing cost of hole-making operations. In this work therefore, an attempt is made to use both a recently developed particle swarm optimisation algorithm and a shuffled frog leaping algorithm demonstrating in this way an example of plastic injection mould. The exact value of the minimum total processing cost is obtained by considering all possible combinations of sequences. The results obtained using particle swarm optimisation and shuffled frog leaping algorithm are compared with the minimum total processing cost results obtained by considering all possible combinations of sequences. It is observed that the results obtained using particle swarm optimisation and shuffled frog leaping algorithm are closer to the results of the minimum total processing cost obtained by considering all possible combinations of sequences presented in this work. This clearly shows that particle swarm optimisation and shuffled frog leaping algorithm can be effectively used in optimisation of large scale injection mould hole-making operations 2015-12-01T00:00:00Z http://localhost:8080/xmlui/handle/123456789/2879 Title: Nonlinear transient stability study of two lobe symmetric hole entry worn hybrid journal bearing operating with non-Newtonian lubricant Authors: Kushare, P. B.; Sharma, S. C. Abstract: The present paper, deals with a theoretical study concerning the effect of non-Newtonian lubricant on the stability of a two lobe symmetric hole entry worn hybrid journal bearing, compensated with constant flow valve restrictor. Trajectories of journal center motion have been obtained by solving the nonlinear equation of motion for the journal center with the Runge–Kutta method. The numerically simulated results indicate that the non-Newtonian behavior of the lubricant has a profound influence on the journal trajectories and stability of a worn hybrid journal bearing. A proper selection of parameters such as offset factor, wear depth parameter and the non-linearity factor may provide better bearing stability. 2013-08-28T00:00:00Z http://localhost:8080/xmlui/handle/123456789/2878 Title: Nonlinear transient response of rough symmetric two lobe hole entry hybrid journal bearing system Authors: Sharma, S. C.; Kushare, P. B. Abstract: The present paper describes the effect of surface roughness orientation pattern on the nonlinear transient response of symmetric two lobe capillary compensated hole entry hybrid journal bearing. Nonlinear equations of motion have been solved with the Runge-Kutta method. The stability of the journal bearing system has been studied by obtaining the journal center motion trajectories. The results of the study reveal that the surface roughness pattern significantly changes the stability of capillary compensated two lobe hole entry hybrid journal bearing. Hence, from the bearing stability point of view, a proper selection of the surface roughness pattern and bearing geometry is essential. 2015-09-12T00:00:00Z