Ameya D. Khodegaonkar, Nitin kumar Anekar, S. B. Girase, S. S. Hirmukhe
Vibrations and shocks are present in all areas of our daily lives. They may be generated and transmitted by motors, turbines, machine tools, bridges, towers and even by the human body. The measurement of this is very crucial in as per its applications. This paper gives study of vibration measurement using a seismometer in ancient days to the accelerometer today. Study gives basic theory, construction and working of vibration measuring system used. It focuses on vibration measurement using piezo film and its advantages, disadvantages and applications. Latest triaxial miniature piezoelectric accelerometer is given with its applications over other measuring instruments.
Vehicular ad-hoc networks (VANETs) have envisioned various applications that substantially improve traffic safety and efficiency along the roads and highways. There are on-going projects to standardize VANETs and to start off their real-life deployment. Despite the huge benefits envisioned by VANETs, they cannot be readily deployed due toserious security and privacy concerns. These security and privacy concerns should be addressed and thus VANETs require a sound secure communication algorithm. In this paper we Compare security aspects of Vehicular Adhoc Network (VANET) with two different security algorithm implementations DES (Data Encryption Standard) and Diffie Hellman to find the efficient way of securing data gathering and sharing in VANET environment.
Front fender design of three wheeler vehicle is very important with the focus on an improvement aspect in the automotive industry. The goals are to increase the performance and to find the solution to reduce the cost of the fender because of the amount of material used, hence able to reduce the production cost. In this paper Finite element models of the front fender of three wheeler vehicle were analyzed, using linear and nonlinear finite element analyses in CAE software. Experimental and analysis stress were compared to evaluate the validity of the FEA approaches. In this study, multi-stage topology and free-size optimization of front fender structure have been performed using Optistruct by Altair engineering, used to design a lightweight front fender when subjected to service loads. An existing commercially available front fender mudguard serves as the reference design space. The objective function for topology optimization is used during the development stage to determine placement of supporting ribs in fender component and confirm material reduction of an existing feasible design space. Element level free-size optimization is used to determine optimal material distribution by variable shell thickness optimization. Functional requirements validation is performed using nonlinear finite element stress and stiffness design checks. An overall reduction in weight of 1.04% is achieved over a reference commercially available front fender component. Front fender is one of the main parts which are used as protection for three wheeler vehicle from front collision. In this paper, a low velocity vehicle impact is performed to assess the damage to the structure of the fender should be minimal in order to reduce the repair cost . The front fender is responsible for absorbing the kinetic energy of vehicle during a low speed impact and at same time no other structural parts should be damaged. Due to the difficulty and the highly expected cost to perform model testing and impact data for validation, finite element simulation provides an alternative tool for physical validation. The study is focused on a simulation of low velocity impact by a moving object is carried on Existing & Modified design of front fender mudguard of three wheeler will be tested by using the explicit nonlinear finite element code LS-DYNA solver for Energy absorption capability, Deflection, and stress distribution. Results of modified front fender are compared against existing design of front fender for better and safe design utilization.
The human interference in natural functioning of river has been often, a cause to disturb the river morphology and ecology. Construction of bridges, their piers and abutments, ghats on banks, river training works, C.D works, illegal encroachments and other man made activities affect the natural behavior of rivers. Due to such constructions and activities, the water flow profiles, velocity of flow, scouring and silting tendency of river flow and other river characteristics such as channel geometry, rugosity coefficients, bed slope resistance, etc are affected significantly. Present paper attempts to present a case study of bridge scouring at river Godavari in Nasik, Maharashtra (India). The huge construction work of construction of ghats, river bed concreting, river training works and construction of bridges have been undertaken of the holy event „ Sinhastha Kumbhamela‟. The effect of these works on river behavior from aspects of scouring is tried to analyze by considering two bridges, one on upstream of such works and the other on downstream. One dimensional numerical analysis soft computing tools- Hydrologic Engineering Centre- River Analysis Centre- HEC-RAS is used for modeling a bridge scouring.
The use of cementitious composites for infrastructure applications is becoming more popular with the introduction of new high performance materials. Ferrocement laminates are introduced to enhance the overall performance of structures, such as composite bridge decks, beams, bearing walls, etc. This seminar aims at evaluating impact resistance of fibrous ferrocement composites using a new combination of synthetic fibres (Polypropylene). Reference mortar with OPC 53 grade of 1:2 grade was compared to matrix of Polypropylene. Constant water in ferrocement cement ratio of 0.5 was maintained for all the mortars. Galvanized chicken mesh was incorporated in two, four and six layers to investigate the influence of reinforcement on impact strength. The samples were cured for 28 days period. An impact was given by 14.00 kg hammer with 370 mm drop height. The energy absorbed by the specimen was calculated. The result has shown that, the impact energy increases with increase in number of mesh layers and with increase in percentage of Polypropylene fibre from 0.5 to 2.0% and also, with increase in curing period of specimen. The effect of curing period on impact strength was also investigated.
The possibility of waste heat from the automobiles has been of great significance in view of ever increasing energy demand and environmental constraints. Waste heat utilization for the cooling helps in reducing problems related to global environment, such as greenhouse effect from CO2 emission due to the combustion of fossil fuels in engines, and the use of chlorofluorocarbon refrigerants which is currently thought to affect depletion of the ozone layer. Thus to overcome these issues we bring out a new system where the maximum utilization of the exhaust energy can be used. The present paper discusses the study of Exhaust Gas Heat Recovery of Multi-cylinder C.I and that heat will be used for the Vapour absorption refrigeration systems based on the corresponding result of electric based generator and finding the same COP for the VARS by using engine exhaust energy as input. The main purpose of this investigation to explore the feasibility of using waste energy to design the absorber and generator. The obtained results show that the coefficient of performance (COP) values directly proportional with increasing generator and evaporator temperatures but decrease with increasing condenser and absorber temperatures, the coefficient of performance of the system varied between 0.6 to 0.86. This proposed system is economical, eco- friendly and also have good future scope.
The project deals with the modeling, design and analysis of the Big Office building with the help of Smart Energy Web based modeling software. In this Project the building layout is designed on AUTOCAD software. The Analysis of the cooling load is done with help of Smart Energy Software and the required base load calculation is done. It deals with effect of Thermal insulation of the walls with the help of polystyrene material and air gap between the walls and the study of Heat Recovery Wheel and the effect of Heat Recovery Wheel on the cooling load and the total saving in the cooling load requirement.
Preeti Bailke, S. T. Patil, Piyush Vadsariya, Abhinav Shaha
Associative classification finds correlations among items in training dataset in order to predict the class label/s of previously unseen data objects. Major issue of associative classification is the large number of rules due to large number of keywords in the documents. To overcome this, text summarization on training dataset is introduced in this paper, which is not present in existing RMR(Ranked Multi-label Association Rule) algorithm. Number of rules generated directly depends upon size of the training dataset. So this is successful approach of reducing size of documents and thus number of class association rules by applying text summarization at the cost of overhead of little increase in pre-processing time.
Tension stiffening is the ability of mortar to carry tension between cracks and provide extra stiffness to member in tension. Although plain mortar is not considered to carry any tension at the cracks, it is still able to carry tension between the cracks when the reinforcing steel is bonded to the concrete. This effect is called tension stiffening, and it effectively stiffens the member response and reduces deflections up to yielding of the reinforcing Steel. As flexural cracks start to develop in plain mortar, the energy stored in the material eventually gets converted to fracture energy. This energy advances existing cracks and causes the mortar to soften at relatively high rates. The existence of reinforcement stiffens and engages the mortar between the cracks through local bond stress transfer associated with local bond-slip. This behavior improves the softening response by introducing the tension stiffening effect, which causes the average mortar stress in tension to gradually reduce to zero as the cracking intensifies. Due to addition of fiber in mortar, it is able to carry tension at the cracks in addition to tension between the cracks. Fiber Reinforced mortar can exhibit significant amounts of post cracking tensile resistance at a crack, depending on the type and dosage of fibers used. These results in a reduced crack spacing, Ferrocement is a term commonly used to describe a steel-and-mortar composite material. Pier Luigi Nervi introduces Ferrocement concept in 1942 when he observed that reinforcing concrete with layers of wire mesh produced a material possessing the mechanical characteristic of an approximately homogenous material. Ferrocement is a high-quality material whose simple constituents and formations make it usable for many construction purposes in even the most underdeveloped societies. Ferrocement is more versatile than RCC and can be formed into simple or compound curves. In contrast, RCC construction is cast in section and needs extensive and very solid formwork to support the weight of concrete.