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Structural and Modal Analysis of Composite Material Shaft with Damping Material
Gyadari Ramesh ; Dr. G. Chandra Mohan Reddy
Mechanical Engineering
Year: 2015, Volume:2, Issue : 6
Pages: 60 - 70
High-technology structures often have stringent requirements for structural dynamics. Suppressing vibrations is crucial to their performance. Passive damping is used to suppress vibrations by reducing peak resonant response. Viscoelastic damping materials add passive damping to structures by dissipating vibration strain energy in the form of heat energy. The incorporation of damping materials in advanced composite materials offers the possibility of highly damped, light-weight structural components that are vibration-resistant. The aim of the project is to analyze the shaft without damping material and with damping material. The present used material for shaft is steel. In this thesis, the composite materials considered are E – Glass Epoxy and S2 Glass Epoxy. The material for damping is rubber. The structural analysis will be done to verify the strength of the shaft and compare the results for three materials. Modal analysis will also be done on the shaft to determine mode shapes. Analysis will be done in Ansys.
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Review of Effect on Turbocharge System with Inter Cooling Process
Ghanshyam Pradhan ; Gopal Sahu; Prakash Kumar Sen; Ritesh Sharma; Shailendra Bohidar
Mechanical Engineering
Year: 2015, Volume:2, Issue : 6
Pages: 75 - 78
In this paper we writing in turbocharged diesel engine with inter cooling process, the turbocharged diesel engine using the inter-cooler and increased the performance of turbocharger system (turbocharged diesel engine).the intercooler are this two type are generally used air-to-air intercooler and air-to-water intercooler. Increasing fuel prices and more strin-gent emission regulations are the most powerful driving force behind the developments. This particularly applies in the commercial vehicle sector, where optimal efficiency is the permanent objective. The commercial vehicle of the future is characterized by high cost-effectiveness and meets all applicable emission regulations. Mobility will remain at least at the cur-rent level, but will more likely increase. Coolers of different constructions and versions are used for the charge air inter cooling.
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Decentralized Access Control with Unidentified Authentication for Information Security in Cloud Computing
Siva Rama Prasad Kollu
Computer Engineering
Year: 2015, Volume:2, Issue : 6
Pages: 79 - 82
Cloud computing has is a popular design in managing world to back up large volumetric details using cluster of commodity computer systems. It is the newest effort in offering and managing computing as a service. The decentralized access control scheme distributes the data stored in cloud to user. Valid user can only access the stored information. The valid users attribute satisfies the access policy that attached to the cipher text. In the proposed decentralized approach, the technique does not authenticate users. When the users have matching set of attributes, can they decrypt the information stored in the cloud the set of attributes possessed by the revoked user. This provides user revocation and prevents replay attacks. Decentralized access control scheme can distribute secret keys for valid user in set of attribute. If the user is not authorized individually decentralized access control distribute authorized secret keys to user in set of attribute such that only that user can encrypt the stored data using its secret key. The proposed algorithm is Token Verification algorithm. Using this algorithm the creator or author of the data can verify who are all modifying the document. The algorithm provides more security in access control and authentication. Moreover, our authentication and access management theme is suburbanized and sturdy, in contrast to different access management schemes designed for clouds that square measure centralized.
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Performance of WRF (ARW) over River Basins in Odisha, India during Flood Season 2014
Sumant Kumar Diwakar ; Dr. (Mrs.) Surinder Kaur; Dr. Ashok Kumar Das; Anuradha Agarwala
Remote Sensing and GIS
Year: 2015, Volume:2, Issue : 6
Pages: 83 - 92
Operational Weather Research & Forecasting – Advanced Research WRF in short WRF (ARW) 9 km x 9 km Model (IMD) based rainfall forecast of India Meteorological Department (IMD) is utilized to compute rainfall forecast over River basins in Odisha during Flood season 2014. The performance of the WRF Model at the sub-basin level is studied in detail. It is observed that the IMD’s WRF (ARW) day1, day2, day3 correct forecast range lies in between 31-47 %, 37-43%, and 28-47% respectively during the flood season 2014.
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Evaluation of Response Reduction Factor using Non Linear Analysis
Tia Toby ; Ajesh K. Kottuppillil
Civil Engineering
Year: 2015, Volume:2, Issue : 6
Pages: 93 - 98
The main objective of the study is to evaluate the response reduction factor of RC frames. We know that the actual earthquake force is considerably higher than what the structures are designed for. The structures can't be designed for the actual value of earthquake intensity as the cost of construction will be too high. The actual intensity of earthquake is reduced by a factor called response reduction factor R. The value of R depends on ductility factor, strength factor, structural redundancy and damping. The concept of R factor is based on the observations that well detailed seismic framing systems can sustain large inelastic deformation without collapse and have excess of lateral strength over design strength. Here the nonlinear static analysis is conducted on regular and irregular RC frames considering OMRF and SMRF to calculate the response reduction factor and the codal provisions for the same is critically evaluated.
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Dynamic Analysis of Vibration Screen
Gunaji Ashok Sawant ; Amey Kulkarni; V. Murali Mohan
Mechanical Engineering
Year: 2015, Volume:2, Issue : 6
Pages: 99 - 104
A dynamic model of vibration screen for cement industry is established in order investigate the working performance of the system. In order to acquire result 3D model of vibration screen is created using solid works 2012. In modelling for simplicity whole mass of vibration screen is considered as equivalent mass which is supported by four spring. Simulated model is used in Ansys Workbench 14 for analysis of system. In analysis modal analysis used to find natural frequency of system. Modal analysis is the process of determining inherent dynamic characteristics of system in form of natural frequency, damping factors and mode shape and using them to formulate mathematical model for its dynamic behaviour. The formulated mathematical mode is referred to as modal model of the system and the information for the characteristics is known as modal data. The dynamics of a structure are physically decomposed by frequency and position. This is clearly evidenced by the analytical solution of partial differential equations of continuous systems such as beams and strings. Modal analysis is based upon the fact that the vibration response of a linear time-invariant dynamic system can be expressed as the linear combination of a set of simple harmonic motions called the natural modes of vibration.
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Power conditioning by Shunt Active Filter
Prof.Sumita D Chakrabortty ; Prof.Naimesh Zaveri
Electrical Engineering
Year: 2015, Volume:2, Issue : 6
Pages: 105 - 110
In modern distribution systems the proliferation of non-linear loads results in a deterioration of the quality of voltage waveforms at the point of common coupling (PCC) of various consumers. Therefore, power-conditioning equipment is becoming more important for electric utilities and their customers. With the rapid development of semiconductor devices in power and control circuits, a new generation of equipment for power quality, the active power filters, has been developed. Their advantages over conventional means are more flexibility and very fast control response. The control of an active filter comprises two major parts: the reference current computation and the current control. There are two fundamental methods of generating the reference current: (i) frequency–domain methods, based on the Fourier analysis and (ii) time-domain analyze, based on the theory of instantaneous imaginary power in the three-phase circuits, often called p-q theory.
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A Time Domain Reference-Algorithm for Shunt Active Power Filters
Prof. Sumita D Chakrabortty ; Prof.Naimesh Zaveri
Electrical Engineering
Year: 2015, Volume:2, Issue : 6
Pages: 111 - 117
The aim of this paper is to identify an optimum control strategy of three-phase shunt active filters to minimize the total harmonic distortion factor of the supply current Power Quality (PQ) is an important measure of an electrical power system. The term PQ means to maintain purely sinusoidal current wave form in phase with a purely sinusoidal voltage wave form. The power generated at the generating station is purely sinusoidal in nature. The deteriorating quality of electric power is mainly because of current and voltage harmonics due to wide spread application of static power electronics converters, zero and negative sequence components originated by the use of single phase and unbalanced loads, reactive power, voltage sag, voltage swell, flicker, voltage interruption etc. The simulation and the experimental results of the shunt active filter, along with the estimated value of reduction in rating, show that the shunt filtering system is quite effective in compensating for the harmonics and reactive power, in addition to being cost-effective.
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