【摘要】 在保证钢结构稳定的前提下,结合结构动力学关于多自由度自由振动的理论,以两端固定的钢箱梁为模型,通过有限元软件ANSYS建模,分析初弯曲、残余应力等初始缺陷对结构模态参数的影响,分别讨论前4阶频率的变化。研究表明,残余应力对钢箱梁结构的模态参数影响较大。更多还原

【Abstract】 Combining the stability of steel structure and the theory of structural dynamics on free vibration of multiple degrees of freedom,a steel box beam fixed at both ends was built by ANSYS to get corresponding structural response with given initial defects,which consisted of initial bending and residual stress,and the change of first four frequencies were discussed.The research showed that residual stress had great influence on modal parameter of steel box beam structure.更多还原