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国家自然科学基金(10672029)

作品数:2 被引量:9H指数:1
相关作者:郭峰玮岳前进许宁毕祥军更多>>
相关机构:大连理工大学更多>>
发文基金:国家自然科学基金国家高技术研究发展计划更多>>
相关领域:理学交通运输工程天文地球更多>>

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Mitigation of Ice-Induced Vibrations for Offshore Platforms Using Tuned Mass Damper
2008年
The problems of ice-induced vibration have been noticed and concerned since the 1960s, but it has not been well resolved. One reason is that the dynamic interaction between ice and structure is so complicated that practical ice force model has not been developed. The recent full-scale tests conducted on jacket platforms in the Bohai Sea presented that ice could cause intense vibrations which endanger the facilities on the deck and make discomfort for the crew. In this paper, the strategy of mitigation of ice-induced offshore structure vibration is discussed. Based on field observations and understanding of the interaction between ice and structure, the absorption mitigation method to suppress ice-induced vibration is presented. The numerical simulations were conducted for a simplified model of platform attached with a Tuned Mass Danlper (TMD) under ice force function and ice force time history. The simulation results show that TMD can fa- vorably reduce ice-induced vibrations, therefore, it can be considered to be an alternative approach to utilize. Finally, the application possibilities of utilizing TMDs on other miniature offshore structures in ice-covered areas of marginal oil fields are discussed.
张力岳前进张文首
冰致自激振动测量与机理解释被引量:9
2007年
在海洋平台上观测到了冰致结构的稳态振动,以及冰力和平台响应间的频率锁定现象.通过对实测数据和冰与结构相互作用的破碎机理分析,证明冰致稳态振动属于自激振动.给出了产生冰致自激振动的条件,提出了冰致自激振动的物理机制,指出冰致自激振动发生在冰加载速率的韧脆转变区,整个过程中冰内裂纹的形成与扩展受到了结构运动速度的控制.冰内部的微裂纹行为是解释与描述冰致自激振动的关键要素.
岳前进郭峰玮毕祥军许宁
关键词:自激振动振动测量
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