【摘要】 针对上弦型钢空间双向张弦梁同时考虑几何非线性与材料非线性,对结构施加简谐激振荷载作用研究其动力响应。采用有限元数值分析方法,通过模态分析、谐响应分析及时间历程分析等手段,考察不同作用位置和不同作用频率的激振荷载作用下的动力响应数值计算结果。计算表明,上弦型钢空间双向张弦梁结构的频率较密集,整体刚度较大,改善了张弦梁结构偏柔的性能,对简谐激励荷载的动力响应有非常积极的控制作用,同时找出结构的薄弱环节及动力响应规律。更多还原

【Abstract】 According to BSS that is space two-way and bent section steel,and considering the geometric and material nonlinearity,harmonic excitation loads are exerted to the structure to study its dynamic response.Using finite element analysis method,through the modal analysis and harmonic response analysis as well as the time history analysis method,the numerical calculation results of the dynamic response under vibration load of different roles in different position and role in frequency are inspected.Calculation results show that frequency of the BSS is dense,and its stiffness is larger,so its partial soft performance is improved.And BSS has a very positive control function to dynamic response of simple harmonic excitation load.Finally,the weak link of structure and rule of dynamic response are found out.更多还原