Top Configuration Optimization of Complex Box Girder Under Moving Load
There is obvious stress concentration at the welding seam of the variable section of the top of crane box girder commonly used in the comprehensive installation of prefabricated building components and metallurgical production lines.A reasonable parametric finite element model of crane box girder is established and its statics is analyzed.The transient response of the box gird-er under moving load is simulated by finite element software,and the displacement response and the stress response at the top of the box girder are obtained.Finally,according to the analysis results,the hot spot stress method is used to construct the expression of maximum stress at the top.Under the conditions of ensuring a small increase in the mass of box girder and other constraints,the optimization model is established with the minimum stress at the top as the optimization goal,and the stress at the top of box girder satisfies the strength condition through optimization.The optimized scheme is compared with the initial scheme,and the feasibility of the optimized scheme is verified.
NETL
NSTL
万方数据
维普
