www.ijcrt.org © 2018 IJCRT | Volume 6, Issue 2 April 2018 | ISSN: 2320-2882 IJCRT1812379 International Journal of Creative Research Thoughts (IJCRT) www.ijcrt.org 1182 VIBRATING TABLE FOR EQUIPMENT TESTING Prof. Vaibhav S. Kamble, Sujit Thakur, Shridhar Sahu, Suraj Kori and Armaan Syed Vishwaniketan's Institute of Management Entrepreneurship and Engineering Technology, Department of Mechanical Engineering, University Of Mumbai. Abstract- This paper presents the modelling and control design of a vibratory table which could actually test the components by applying multiple of G-force using undamped frequency. The vibrating machine will test the components of an AFV, whether it would withstand the vibrational forces along with the G-force applied which is one of cause of vibration. The equipment of Armored fighting vehicle (AFV) which will undergo vibrational forces during working condition on the battle field are to be tested before installing them into the AFV. A mathematical model of the system is developed to evaluate the effect of each of the design parameters. The CATIA V5R19 software is used for cad modelling and validation of the vibrating machine. The vibratory table is designed systematically to optimize the performance of the system as well as improve its robustness. KEYWORDS – AFV, G-force, undamped vibration, frequency. I. INTRODUCTION The vibration table unlike the common applications like paving concrete, it will be mainly used for checking and analyzing the equipments or components that are produced and supplied to the armed forces. This Vibration table will provide variable frequency keeping the amplitude constant which in turn will impart variable G-forces on the components due to changing vertical linear acceleration. The G-force test will define the components permissible limits and ensure whether the component is safe enough to be installed in the AFV. The components of the vibrating table consists of a table top which will be supported by four vertical spring which will give the table top one degree of freedom to move in vertically linear direction due to spring effect. This vibration will be caused by an unbalanced mass mounted on a shaft which will be driven by belt and pulley drive with the help of an AC motor. II. LITERATURE REVIEW [1] Thomas Bevan and Matthew Laurino - The currently used vibration table (VT3) has several disadvantages associated with it, which the new table (VT4) eliminates. Compared with the VT3, the VT4 has a more rigid tabletop and improved suspension system in order to vibrate the concrete within the wooden mold frames and maintain the integrity of concrete molds. Additionally, with the use of a single Damping Mass of 10 kg, the VT4 outputs the required amplitude of 0.3 to 0.4 mm and frequency of 3900±200 RPM to correctly consolidate concrete ranging from 2 to 40 kg. Furthermore, as desired, the VT4 uses the same motor and support frame as the VT3. See Figure 1 for a drawing of the final VT4 design. III. DESIGN APPROACH Figure 1 : Full assembly of vibratory table A. TABLE TOP The following section summarizes the analysis performed on the reinforced tabletop design that is common between the three four corner suspension type design options. The tabletop for our design has to be very rigid because the amplitudes of vibration are between 4.5 mm. Since the amplitudes are so small, the flex of table due to the forces from the eccentricity coupled with the weight of component and acceleration forces must be limited to less than 4.5 mm. This is to ensure that the tabletop does not vibrate only the center of the table. To accomplish this required rigidity and to minimize the cost we kept the table to thickness to 5 mm. Different clamping devices can be used to clamp the components such as Claw machine clamp GRS, Hold down table clamp BS, Hold down table clamp BSG. Material selection and properties The material selected for the table top should sustain high vibrational and a range of G- forces. The table top will undergo a uniformly distributed load that will cause bending effect if the material chosen is inappropriate. This table top will also undergo fatigue stress due to variation in frequency due to gradual change in angular velocity. The clamping system used to mount the components on the table top will produce scratches and indents on the surface of the table top resulting in faster wearing off of the table top and leading to crack propagation. The material medium carbon steel being selected from various of material options available in market due to its good and cheaper availability in the market. The medium carbon steel also has the desirable properties as required for the tabletop. It came out to be highly resistive to the bending load due to its high bending stress capacity while designing the tabletop using the medium carbon steel. [5]