Research On The Cable Force Testing Analysis And Parameter Optimization Of Suspender For A Large Zigzag-shaped Steel Indoor Suspension Bridge

This paper summarizes the general force measurement methods of steel cable, based on the recent study on the suspension bridge. The profound study of the frequency method (the most commonly used method) has been conducted, and the formulas is derived based on the string theory of frequency methods and the Euler beam theory.The presented frequency methods are used to make analysis of the vertical boom of Bongbu Steel Suspension Bridge.This paper presents the theory of structural optimization design, and introduces its basic theory, the three main factors and the corresponding mathematical model.Besides, the ANSYS parametric modeling method and its optimization is also presented in this study, especially zero order optimization theory and first order optimization theory.This paper also adopts the ANSYS Parametric Design Languages to set up the parametric finite element model. The ANSYS first order optimization method is used in the optimization design of the suspension bridge. In this study, the initial tensile force and cross section of the booms is used as design variables, and the boom stress is used as state variables. The whole volume of the booms is treated as objective function to carry out this optimization of booms.Through the optimization analysis of ANSYS software, there is a optimization model. Then the differences between the two suspension bridge models are listed while both of them are under several different working conditions such as static, model and transient state. According to these analysis and differences, compare the state of suspension bridge before and after optimization. The results indicates that the more uniform stress takes place in the optimized model, and the optimized model exhibits better economic value.