Long-line water delivery structure dynamic and time-historical analysis modeling method based on coupling theory

Abstract

The invention discloses a long-line water delivery structure dynamic and time-historical analysis modeling method based on a coupling theory, and relates to the technical field of finite element auxiliary design. The method mainly comprises the following steps that: (1) carrying out structural analysis on a long-line water delivery structure, and defining unit types and material properties required by the finite element model; (2) utilizing a constraint equation coupling method to realize the multi-segment coupling of the long-line structure of rock stratum mutation; (3) utilizing a fluid-structure interaction method to realize the coupling of a non-sticky compressible water body and a structure; (4) utilizing the coupling of a viscoelasticity boundary element and a rock stratum finite element to realize the input of an earthquake time-historical wave of a discrete point; and (5) carrying out dynamic time-historical calculation on the long-line water delivery structure. By use of the method, on the basis of ANSYS software, the problems that a long-line water delivery structure which considers earthquake energy scattering and bed rock elastic restoring force is difficult in simulation and calculation efficiency is low are solved. The method can be widely used for the time-historical performance research of each category of long-line water delivery structure under the working conditions of geological mutation and more excess of water.

Description

technical field [0001] The invention relates to the field of finite element auxiliary design of water conservancy projects, in particular to a modeling method for dynamic time-history analysis of long-line water delivery structures based on coupling theory. Background technique [0002] The distribution of water resources in China is uneven. In order to solve the serious contradiction between water supply and demand in populated areas, a large number of cross-basin water transfer projects represented by the South-to-North Water Diversion Project have been widely constructed in recent years. Under the influence of strong shock waves, long-distance water pipelines passing through the seismic fortification area will suffer serious earthquake damage such as cracking, water seepage, and even permanent large deformation. Therefore, the use of finite element numerical analysis method to realize the dynamic performance research of long-line water conveyance structures in high-earthq...

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Problems solved by technology

[0004] The technical problem solved by the present invention is: Aiming at the limitations of existing research methods, a long-line water conveyance structure dynamic time-history analysis modeling meth

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