带阻尼器拉索结构的索力识别研究

Study on the Cable Force Identification of Cable Structure with Damper

为解决带多个阻尼器索结构的索力识别问题,依据动力学相关理论,建立带3个减振器的拉索-减振器动力学模型,推导其频率方程,构造相应的无量纲参数并进行参数分析。结果表明:随着减振器支撑刚度的增加,无量纲振动频率逐渐增大,但这种增大趋势随支撑刚度的继续增加而趋于平缓;随着减振器安装距离的增加,无量纲振动频率逐渐增大,且这种趋势接近线性变化。最后利用有限元分析软件ANSYS并分别采用LINK单元与BEAM单元对其结论进行验证。

In order to solve the problem of cable force identification with multiple shock absorber cable structures,a cable-shock absorber dynamic model with three shock absorbers was established based on the dynamics-related theory,and its frequency equation was derived,a structure of corresponding dimensionless parameters was constructed.By setting different values of the two dimensionless parameters,the influence of each parameter on the dimensionless vibration frequency of the structure is analyzed.The results show that as the support stiffness of the shock absorber increases,the dimensionless vibration frequency gradually increases,but this increasing trend tends to be gentle as the support stiffness continues to increase;as the installation distance of the shock absorber increases,the dimensionless vibration frequency The vibration frequency gradually increases,and this trend is close to a linear change.Using the finite element software ANSYS and using the LINK element and the BEAM element to establish the finite element model for simulation,the results show that the calculation results of the proposed formula are in good agreement with the finite element results,and have higher accuracy in the long cable structure.