考虑边界弹性约束刚度的拉索参数识别

提出了由拉索实测振动频率同时识别出拉索索力和抗弯刚度的模态参数识别法。首先，在考虑边界弹性约束刚度基础上研究了拉索索力、抗弯刚度和频率之间的关系。然后，根据振动模态特点，得到索的等效长度。进而以拉索索力和抗弯刚度为模态参数，采用最小二乘法对模态参数进行识别，保证理论模型和实测模型之间的总误差最小。最后，通过算例进行验证，表明使用模态参数识别法能够精确的识别出索力和抗弯刚度。

Determination of Cable Tension Accounting for Rotational End Restraints

This study presents a modal parameters identification approach which can identify the cable tension and bending stiffness simultaneously only from the cable frequencies.Firstly,the rotational end restraints are taken into account to find the relationship among cable tension,bending stiffness and the frequencies.Secondly,according to modal character,the equivalent length is obtained,and then the least square modal parameters identification approach is used to obtain cable tension and bending stiffness to att...