T. Karech *, A. Noui$, A. Berkane #, A. Beroual
The digging of one or more tunnels is a process that destabilizes the field, maintaining the stability of the tunnel wall and control of ground movements around the gallery resulting from each excavation and the interaction between two tunnels must be controlled. This research aims to analyze and understand the physical mechanisms games during the digging of two twin tunnels throughout the spatial configurations and evaluated the ground motion induced by the interaction between these two lasts. The three-dimensional effect of widening is taken into account using the decontainment rate of soil adjacent to the excavation by the application of the convergence-confinement method. The modeling work is executed in two-dimensional, by using the finite difference code Flac-2D. A comparison of numerical simulation results with in-situ measurements was established in the particular case of two parallel horizontal tubes of the tunnel T4 on Elharouche Skikda and for which experimental data exist. Keywords: Tunnel, interaction, numerical simulation, prediction.
Harshad S. Sidawadkar*, V. S. Mahajan# and Subim Khan
Machine spindle drives require high speed high torque transmission with constant velocity ratio (limited slip). Conventionally v-belt drive gives low efficiency and does not have constant velocity ratio. Commercial gearboxes like the worm gear drive spur or helical gear box needs a separate belt drive which makes the it bulky, space consuming and costly. More over by the application of worm gear box in many cases it is found that the transmission efficiency is drastically lowered. So there is a need of shaft mounted speed reducer to solve above problem. Project aims at development of an integrated timer belt drive Epi-cyclic shaft mounted gear box which will reduce the space consumption, improve efficiency of transmission as spur gears are used and timer belt drive will ensure constant velocity ration even at high speeds. Project work involves the kinematic design of the gear box, modeling of the components of the system using unigraphics nx-8 and analysis of components using ANSYS workbench 16.0 The test rig of the given gearbox will be manufactured and the testing of the system will be done for the performance characteristics. Keywords: Integrated Timer Belt, Shaft mounted, Gear Box, Transmission Efficiency, Constant Velocity ratio.
Rohit S. Belsare*, Avinash Badadhe#, Subim Khan
two rear wheels and provide differential speed to the vehicle wheels when the vehicle takes a turn. Conventional differentials although provide the differential speeds but fails to prevent slip of the differential. In vehicles for application in agriculture it is essential to have differential locking due to slippery conditions hence a differential locking system is needed. Limited slip differentials are available but they are very costly and also they do not offer complete differential locking. Present solutions available in market are either too primitive where in the driver has to get down from the vehicle and then lock the differential or they are very sophisticated in the form of E-locker from EATON which is very costly to implement in commercial vehicles. The project work aims at design development of self-locking differential locking system for an automated agriculture vehicle where in the differential drive and the locking arrangement will be both hydraulically operated. The components will be designed used Unigraphix software and the analysis of the components will be done using Ansys work bench. Further the developed hydrostatic differential model will be tested to determine the performance characteristics of the drive. Keywords: Hydraulic Differential, Self-Locking Differential, Agriculture vehicle differential, Hydrostatic Differential
Lokesh V. Pithe* and Avinash M. Badadhe
This paper summarizes the development of the automatic Electro-Mechanical single plate clutch with the overload protection roller clutch. The major challenges in a Single Plate Clutch automation are the clutch control, which is presently manual. It increases the manual effort and complication during its operation. Due to the complex structure and high cost, the clutch control system used in an advanced vehicle cannot use in economical Vehicles. This situation forces us to develop a Special electro-mechanical clutch that controls automatically. The rarely occurring overload on machines, create some malfunctioning in the System, which may damage its members. By using an overload protection clutch, such overload can neutralize. We develop an Automatic Engage-disengage Overload Protection Roller Clutch. The facility provided to change its torque carrying capacity make this roller clutch special. Thus the combination of the automated single-plate clutch and the overload protection clutch is a desirable one and also essential. After the market survey, it observed that there is no such combined system is available. If we install these two devices separately, it will require more space and cost, which is infeasible. Keywords: Roller Clutch, Overload Protection, Single Plate Clutch, Varying Torque Capacity.
Chaitanya P. Deshpande*, Avinash Badadhe#, Subim Khan
In all automotive sector there is a linkage between brake mechanism and occupant known as a hand brake lever. Existing design is evaluated for optimization with use of composite material. CAD modeling of same will be done using CATIA V5 software. Finite element analysis approach is used to apply standard load on the part which is further investigated to perform Topology Optimization for material efficiency and reduction of cost. Existing design will then be machined as per topological optimization using Composite Material. Weight reduction of Brake lever will be done using Glass fiber epoxy composite material for optimized model. Static analysis of glass fiber hand brake lever will be performed using ANSYS19 software. The comparison of results between existing material and proposed composite material is done by using the techniques of Modal analysis and Static condition analysis of the part . Keywords: FEA, Topology optimization, Composite material, Fiberglass
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