Technical Research In Computer Optimization Of Hole Based On Dynamic Programming

Optimization design is reffered as the engineering design employing the optimization priciple making the design results the most optimum in some respects.In the four decades after the Word War II ,the optimization of engineering design found its strong foothold in the traditional projects of mechanical and civil engineerings. It was then introduced and applied to various operational systems(with construction,information, management, transportation, electrical power, processing industries,etc), appreciated by experts in defferent fields.Dynamic programming is a methods in the solution of multistage decision making process. This kind of optimization methods originated in the 1950's. In 1951, an American mathematist R.Bellman etc, based on the characteristics of a sort of multistage decision making problem expressed it a series of single-stage problems and proposed "The Optimization Principle"for the resolution of this sort of problems. He applied it to many practical problems and then formed one important branch of mathematical programming-dynamic programming.In the production of section steels, 'the design of hole' is the basic content of technological design. The classic hole design methods is largely belong to experical plus experimental methods. As the widely application of applied mathematics in engineering and the development of computer techniques,many previous experical exprescions were replaced with statistical equations under certain conditions,and more accurate results could be obtained . In hole design, using computer can not only conduct analytical compution,but also realize diagnostic inference. This is what we usually called "Computer Aided Roll hole Design" abbreviated as CARD. CARD makes design period shorter compution periods, having very high superourity compared to the classical methods.The use of optimization technique in CARD is an inevitable trend. The hole designed this way can make some objectives optimum while the classic methods could not.This thesis firstly introduced the optimization methods based on dynamic programming presented the objective function to be optimized according to its rolling technological features, selected appropriate optimization methods to make optimization ,and realized with computer programs. It was desired to realized the optimization objective by means of optimization calculation program as theproduction conditions were fulfilled. To get the conclusion of the structure and system respected fully the theory and characteristis of the optimization methods not only meeting the demand of practical production,but also is subject to further development and study.