大型变电设备在驳船实际运输中，在风浪、潮流等外部作用下经常发生不同程度的损坏，研究最不利环境下设备的动力响应，对运输设备的安全性进行探讨是必要的。为此，以某海上直流换流阀塔为研究对象，基于其自身振动特性研究其在海上运输的动力响应，针对海上运输环境复杂多变，研究工况多，时频分析计算周期较长，在功率谱分析的基础上提出了基于拟静力的分析方法。结果表明，当波浪频率与结构基频比值小于0.15时，可用拟静力法直接得到结构应力响应，位移响应则需对拟静力结果1.3倍放大修正以保证安全；当频率比接近1时，结构响应的放大修正系数和频率比呈线性相关，以上研究为设备的海上运输安全评估及加固提供依据。
Abstract
In the actual transportation of large power transformer equipment, different degrees of damage often occur under the external action such as wind and wave, so it is necessary to study the dynamic response of the equipment under the most unfavorable environment and discuss the safety of the transportation equipment.Therefore, taking an offshore DC converter valve tower as the research object, the dynamic response of the valve in sea transportation is studied based on its own vibration characteristics. In view of the complex and varied marine transportation environment, many research conditions, and long calculation period of time-frequency analysis, a pseudo-static analysis method is proposed on the basis of power spectrum analysis. The results show that when the ratio of wave frequency to fundamental frequency is less than 0.15, the structural stress response can be obtained directly by pseudo-static method, and the displacement response needs to be amplified by 1.3 times. When the frequency ratio is close to 1, the amplification correction factor of the structural response is linearly correlated with the frequency ratio. The above research provides a basis for the safety assessment and reinforcement of the equipment in marine transportation.
关键词
电气设备 /
海上运输 /
动力响应 /
分析方法
{{custom_keyword}} /
Key words
electrical equipment /
maritime transport /
dynamic response /
analytical method
{{custom_keyword}} /
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
参考文献
[1] 吴康,任丽霜,李大伟. 柔性直流输电技术的现状与展望[J]. 电工技术,2023,(13):115-119.
WU Kang, REN Lishuan, LI Dawei. Current situation and Prospect of flexible DC transmission Technology [J]. Electrotechnical Engineering, 2023, (13): 115-119.
[2] 张国兵,张文亮. 特高压变压器运输冲击加速度控制与安全裕度评估[J]. 高电压技术,2010, 36(01):290-295.
ZHANG Guobing, ZHANG Wenliang. Shock Acceleration Control and Safety Margin Evaluation of UHV Transformer in Transportation [J]. High Voltage Technology,2010, 36(01):290-295.
[3] 崔兴可,胥建文,杨茜,等. 变压器运输过程中的振动与冲击仿真计算分析[J]. 山东电力技术,2018,45(03):26-28+33.
CUI Xingke, XU Jianwen, YANG Qian, et al. Vibration and Shock Simulation Analysis of Transformer during Transportation [J]. Shandong Electric Power Technology,2018,45(03):26-28+33.
[4] 王革鹏,杨春,郭家元. 基于数值仿真的变压器运输强度计算[J]. 能源研究与管理,2018, 4:48-51+67.
WANG Gepeng, YANG Chun, GUO Jiayuan. Transportation strength calculation of transformer based on Numerical Simulation [J]. Energy Research and Management,2018, 4:48-51+67.
[5] 陈健云,岳红原,徐强. 大型变压器器身压紧方式研究及其航运过程中的动力分析[J]. 振动与冲击,2015,34(24):111-116.
CHEN Jianyun, YUE Hongyuan, XU Qiang. Research on Compaction Mode of Large Transformer Body and Dynamic Analysis in Shipping Process [J]. Journal of Vibration and Shock,2015,34(24):111-116.
[6] 兰丁宁,徐强,陈健云,等. 海上柔直换流阀塔海上运输的加固措施[J]. 大连海事大学学报, 2020,46(02):10-16.
LAN Dingning, XU Qiang, CHEN Jianyun, et al. Strengthening Measures of Flexible and Direct converter valve Tower in Sea Transportation [J]. Journal of Dalian Maritime University, 2019,46(02):10-16.
[7] 雒雯霞,孙小平,娄彦涛,等. 柔性直流输电换流阀海上运输仿真方法研究[J]. 电工技术,2021,(17):62-64+67.
LUO Wenxia, SUN Xiaoping, LOU Yantao, et al. Study on Simulation Method of Flexible HVDC Converter Valve in Sea Transportation [J]. Electrotechnical Engineering,2021,(17):62-64+67.
[8] 陈杰峰,黄珊珊,孙震洲,等. 船运阶段海上变电站上部组块-驳船强度分析[J]. 船舶工程, 2022,44(01):142-147.
CHEN Jiefeng, HUANG Shanshan, SUN Zhenzhou, et al. Strength analysis of upper block-barge of offshore substation during shipping phase [J]. Ship Engineering, 2022,44(01):142-147.
[9] 刘燕星,陈晓明,江峰. 重大件货物驳运波浪运动响应预报分析[J]. 广东造船,2017,36 (5):30-33.
LIU Yanxing, CHEN Xiaoming, JIANG Feng. Prediction and analysis of wave motion response of heavy Cargo Transportation [J]. Guangdong Shipbuilding,2017,36 (5):30-33.
[10] Anastopoulos P,Spyrou K. Ship dynamic stability assessment based on realistic wave group excitations[J]. Ocean Engineering,2016,120.
[11] Jiao J L,Sun S Z,Li J D,et al. A comprehensive study on the seakeeping performance of high speed hybrid ships by 2.5D theoretical calculation and different scaled model experiments[J]. Ocean Engineering,2018,160.
[12] 陈鹏飞,吴加文,杨浩淼,等.海上风电起重船施工运动响应分析[J].风能,2018,12:54-59.
CHEN Pengfei, WU Jiawen, YANG Haomiao, et al. Analysis of construction motion response of offshore wind power crane [J]. Wind Energy,2018,12:54-59.
[13] 卢文生,吕西林. 模态静力非线性分析中模态选择的研究[J]. 地震工程与工程振动,2004, 6:32-38.
LU Wensheng, LU Xilin. Study on mode selection in modal static nonlinear analysis [J]. Earthquake Engineering and Engineering Vibration,2004, 6:32-38.
{{custom_fnGroup.title_cn}}
脚注
{{custom_fn.content}}
PDF(2027 KB)
