CHAPTER 1INTRODUCTIONThe moving load problem is a fundamental problem in structural dynamics. Engineers have been investigating the potential danger created by moving masses on structures for several years. The dynamic response of structures carrying moving masses is a problem of great practical importance. Much work has been devoted over the last ten decades to the dynamic response of railway bridges and later road bridges to moving loads. Beam-type structures are widely used in many branches of civil, mechanical and aerospace engineering. The importance of mass movement is found in several applications in the field of transport. Rail and road bridges, suspension bridges, guideways, crane runways, cable cars, rails, roads, runways, tunnels and pipelines are examples of structural elements to be designed to support moving masses. Additionally, in machining process design, many elements can be modeled as beams subjected to moving loads. The dynamic effect of moving loads was not known until the mid-19th century. When the Stephenson Bridge over the River Dee in Chester in England collapsed in 1947, it motivated engineers to research the problem of moving loads. Moving loads have a significant effect on the bodies or structures over which they move. This makes them vibrate intensely, especially at high speeds. The particular characteristics of moving loads are that they are variable in space and time. Modern means of transportation are ever faster and heavier, while the structures on which they travel are ever slimmer and lighter. This is why the dynamic stresses they produce are far greater than the static stresses. The majority of works of art are submitted...... middle of paper ......s insufficient. It brings out more accurate results to take into account the mass and speed of the moving load and the dynamic properties of the carrier system in the dynamic analysis.3. The effect of material change on the dynamic response of simply supported beams and cantilever beams is the same. SCOPE OF FUTURE WORK: 1. The present research can be extended to the Timoshenko beam.2. The acceleration of a moving mass on a structural system strongly affects the dynamic response of the structural system. This may give engineers some advantages in performing more realistic modeling of structural systems subject to accelerated mass motion than conventional methods that omit the inertia effects of accelerated mass.3. There are situations where a series of moving masses move across a beam as a train crosses a bridge. The response of beams to such types of moving loads merits research.