Study On Stability Of Thin-walled Filter Pipe Of Well

As a important way of developing water resource, To develop water under earth has widely use in engineering. When we develop water under earth with deep well, we must use filter pipe of well. There is two use of filter pipe of well .One is preventing soil and stone out of pipe of well, the other is preventing the well wall of collapsing. The filter pipe of well made in steel is a cylindrical pipe line. And there is much hole on it. The filter pipe of well lost its stability when working because of much hole on it. There is no good ideas to deal with at present This article start on mechanics analysis, and then build mechanics model of whole pipe and one rod; thirdly analyze the stability of part of and whole pipe, at last deduce the theory formula of the critical load of part and whole pipe. The main study works are as follows:1．Because the real pipeline is complicate, So we put forward three hypothesis of the pipe in order to simples our calculations. On the basis of the three hypothesis, we build the mechanics model of the part and whole pipe.2．Analyze the stability of pipe on the basis of the mechanics model of one rod .And their thus deduce the theory formula of the critical load of part of the pipe.3．According to the principle of equivalent stiffness, we analyze the stability of the whole pipe, and thereby get a theory formula of the critical load of the whole pipe.4．Calculate the whole pipe with finite element method.