Showing posts from September, 2018

Rotor Balancing

ABSTRACT Unbalanced mass on rotary system cause unnecessary vibrations in the system and sometimes the vibrations are too large that they can damage the system. An unbalanced rotational system typically results in vibrations on the entire system and hence affects its normal working. Hence, while imbalances are insignificant for applications where rotational velocities are low, the thus induced vibrations in fast rotating systems can be catastrophic. In this experimental research work the rotor balancing apparatus is used to balance the rotor system by adding additional masses of unknown magnitude. The mass and position of unknown masses would be calculated using theoretical balancing principles. Introduction In engineering designs of moving part machines the most common engineering problem is the existence of vibrations in the machine. Vibrations in any machine such as steam turbine or multi cylinder internal combustion engine are very common problem and they must be removed

Buckling of Strut Lab Report

In construction applications a column or strut is an element that is used to withstand compressive load.  Strut is similar to beam but it is used in vertical position and normally horizontal beams are placed on the columns or both ends of beams are rested on two  strut s on either end of the beam.  strut s are usually designed to withstand high compressive loads and they can fail or buckle if the loads are too large and columns are unable to withstand that load.  Normally the load at which the column buckles is called critical load and  strut  is typically designed to be used well below this critical load. However, even if the structure is subjected to small loading well below  critical buckling load of strut , the continuous application of such loads could eventually fatigue the structure and build up to buckling failure.  Therefore, understanding the buckling of strut , its characteristics and designing in safety factors are important. In this experiment we will see how columns buckl


Abstract In this lab experiment the beam design was evaluated for a given bending load so that the best engineering design can be used to design the beam for a given load. In order to evaluate the given design of bean against a given load stress and strain produce in beam when load is applied in it was calculated. Stresses in beam were calculated using theoretical formulas and the deflection was measured using foil strain gauges. Similarly the buckling of columns was also studied experimentally for different ends conditions to evaluate the load bearing capacity of columns made of aluminum and brass. STRAIN MEASUREMENT IN BEAM BENDING Introduction For any load bearing system beams are its main supporting structure which provides necessary strength to the structure. Beam provides the required strength to the structure due to strength of its material and it shape. Shape of the beam defines the second moment of inertia which when combine with the load and point of applicati