【摘要】 开展了风荷载作用下多分裂输电导线非线性响应研究,建立了分裂导线的多节点索单元模型,在此基础上基于非线性有限元理论,建立了分裂导线的非线性力学模型,得到了分裂导线的刚度矩阵与受力平衡方程。采用Newton-Raphson法对分裂导线的受力平衡方程进行求解,在非线性迭代过程中建立了位移收敛准则。以沿海地区某实际分裂导线为工程对象,研究了风荷载作用下的分裂导线非线性风致响应。结果表明:分裂导线的风致响应与单导线存在一定差别,其风致响应更加显著。更多还原

【Abstract】 The investigation on nonlinear responses of multi-bundled transmission lines subjected to wind loading was actively conducted.First,a multi-node cable element model for multi-bundled transmission lines was established.The nonlinear mechanical model of multi-bundled transmission lines was constructed based on nonlinear finite element theory.Then,the stiffness matrix and the equilibrium equation of multi-bundled transmission lines were derived.The equilibrium equation of multi-bundled transmission lines were solved by using Newton-Raphson iteration method with displacement convergence criterion.An actual transmission line in coastal areas was selected as an example,the nonlinear wind-induced response of multi-bundled transmission lines was investigated.The made observations indicate that the wind induced responses of mult-bundled transmission lines are obvious and different to those of common single transmission lines.更多还原