海上风电工程弯曲限制器受力特性数值模拟研究

Numerical Simulations on Mechanical Characteristics of Submarine Bending Restrictor of Offshore Wind Power Engineering

海上风电工程一般采用桩身开孔引入海缆进入塔筒,为了防止桩身开孔处电缆的过度弯曲,通常采用弯曲限制器来对海缆进行保护。因此,研究弯曲限制器的应力特征,分析桩身开孔高度对弯曲限制器的应力影响规律具有重要的研究意义。建立了海底电缆-桩身-弯曲限制器数值模型,研究弯曲限制器在海缆安装工况和在位运行工况下的应力特征,分析桩身开孔高度对弯曲限制器应力的影响规律。研究结果表明,在海缆安装工况和在位运行工况下,弯曲限制器元件受到的拉应力大于压应力;弯曲限制器元件头部拐角处受力最大,是最危险的位置;弯曲限制器靠近桩身开孔位置的元件受力更大;弯曲限制器的应力值随着桩身开孔高度的增大而增大,安装工况下弯曲限制器最大拉应力受桩身开孔高度的影响更显著。

In offshore wind power engineering,the submarine cable is generally introduced into the tower cylinder by opening the pile body.In order to prevent excessive bending of the cable at the opening of pile body,the submarine cable is often protected by bending restrictor.Therefore,it is of great significance to study the stress characteristics of bending restrictor and analyze the influence of the height of pile hole on the stress of bending restrictor.The submarine cable-pile body-bending restrictor numerical model is established to research the stress characteristics of bending restrictor under installation and working conditions of submarine cable,and analyze the influence law of pile hole height on bending restrictor stress.The results show that the tensile stress of bending restrictor is greater than the compressive stress when the cable is installed and in service,the corner of the head of bending restrictor element has the largest force and is the most dangerous position,the element near the opening position of bending restrictor is more stressed,the stress value of bending restrictor increases with the increase of pile hole height,and the maximum tensile stress of bending restrictor is more significantly affected by the pile hole height under installation condition.