摘要
针对减振器和阻尼器等中间支撑影响拉索振动频率,降低频率法计算索力精度问题,寻求考虑中间支撑影响的索力计算方法。基于拉索振动微分方程和能量原理,构造拉索等效索长计算公式。该方法可应用于各种基于固结边界的索力实用公式。与有限元方法分析结果比较表明,该方法计算精度良好、适用范围较广;计算简单,便于实际工程应用。
The cable tension test with the frequency method is widely used in construction control, assessment and long-term monitoring of cable-supported structures. Due to existence of intermediate supports, such as, absorbers and dampers, the calculation precision of cable tension is reduced. In order to acquire a cable tension calculation method considering influence of intermediate supports, an equivalent cable length calculation method based on vibration differential equation of a cable and energy principle was proposed here. This method could be applied in many formulas for calculatating cable tension under a fixed-fixed boundary condition. The results from case studies demonstrated that the method can simulate the tension condition of cables with intermediate supports precisely; meanwhile, compared with the finite element method, the method of equivalent cable length calculation is not complex, it can be easily used in practical engineering.
出处
《振动与冲击》
EI
CSCD
北大核心
2013年第7期82-87,共6页
Journal of Vibration and Shock
基金
国家自然科学基金项目(51078134)
关键词
频率法
索力测试
等效索长
减振器
阻尼器
frequency method
cable tension test
equivalent cable length
absorber
damper
