湿模态特征下张力腿结构传感器布点优化

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刘城,常进云,王世圣,郭杏林,武文华.湿模态特征下张力腿结构传感器布点优化[J].,2020,60(4):331-338

湿模态特征下张力腿结构传感器布点优化

Sensor placement optimization of tension leg structure by considering wet modal characteristics

DOI：10.7511/dllgxb202004001

中文关键词:张力腿结构湿模态特征有效独立法传感器布点优化结构健康监测

英文关键词:tension leg structure wet modal characteristics effective independence method sensor placement optimization structural health monitoring

基金项目:国家科技重大专项资助项目(2016ZX05028-02-05).

作者	单位
刘城,常进云,王世圣,郭杏林,武文华

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中文摘要:

传感器的测点优化布置是海洋工程装备结构健康监测的关键问题之一．TLP(tension leg platform)张力腿结构在海洋环境荷载的长期作用下可能出现疲劳损伤行为，开展张力腿原型现场监测研究十分重要．考虑张力腿结构的湿模态特征，基于有效独立法开展了传感器初始测点位置的优化筛选研究，结合模态置信度准则和最小均方差准则，提出了适用于以张力腿为典型结构的大长细比水下结构的传感器布设方法．以某待建TLP为例，应用所提方法给出了张力腿结构的传感器布点优化方案．所提方法在实际张力腿原型监测系统传感器布点优化方面具有一定应用价值，对于水下直立结构也具有借鉴作用．

英文摘要:

Sensor placement optimization is one of the main issues in the structural health monitoring of offshore engineering equipment. The tension leg structure of tension leg platform (TLP) could be led to the fatigue and damage behavior under the harsh working environment loads in deep sea. It is important to perform the on-site prototype monitoring. By considering the wet modal characteristics of tension leg structure, effective independent (EI) method is used to optimize the initial locations of the sensors. Combined with the modal assurance criterion (MAC) and the minimum mean square error (MSE) criterion, a sensor placement optimization method is proposed for the large slenderness ratio underwater structures such as the typical structure of tension leg. Taking a tension leg of a TLP to be built as an example, the sensor placement optimization scheme is given by the proposed method. The method has certain application value in the optimization of sensor placement of the actual tension leg prototype monitoring system, and it also has reference value for other underwater upright structures.

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