新型竖轴潮流发电支撑结构的力学及模态分析  

Mechanical and modal analysis on support structure of new type vertical-axis tidal turbine

作　　者：康海贵[1] 冯超[1] 龙丽吉[1] 汪求顺 

机构地区：[1]大连理工大学海岸和近海工程国家重点实验室,辽宁大连116024

出　　处：《可再生能源》2015年第1期154-158,共5页Renewable Energy Resources

基　　金：海洋可再生能源专项资金项目(GHME2011CL01)

摘　　要：针对新型竖轴潮流发电支撑结构进行精细化建模,在3种不同工况下对结构进行线性静力分析,并在极端工况下对结构进行几何非线性静力分析,最后对结构整体进行模态分析。研究表明,几何非线性静力分析更接近实际情况,分析得到的最大应力比线性静力分析得到的最大应力略大;需注意杆件交点处或结构不同部位组合连接处,该处结构应力最大;水轮机正常运转时的频率不在结构自振频率范围之内,因而不会发生共振。The linear static analysis on the support structure of new type vertical-axis tidal turbine were made by a higher quality finite element model for three different working conditions, and the geometric nonlinear static analysis was made for the extreme working conditions. Then the modal of the whole structure was analyzed. The results showed that the maximum stress obtained by the ge- ometric nonlinear static analysis which was closer to reality and slightly greater than that obtained by the linear static analysis. The maximum stress point which appears at the intersection of bars or the point of DOF coupling of different parts of the structure should be paid more attention to. As the tidal turbine operation frequency was not in the range of the natural frequency of the structure, the structure won＇t resonate.

关 键 词：潮流发电支撑结构 线性静力分析 几何非线性静力分析 模态分析 

分 类 号：P743[天文地球—海洋科学]