| Vibration Control Induced by Ice of a Jacket Platform |
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| 作者姓名： | 郑宏宇 姜大宁 唐友刚 周满红 |
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| 作者单位： | School of Civil Engineering，School of Civil Engineering，School of Civil Engineering，School of Civil Engineering Tianjin University，Tianjin 300072，China，Tianjin University，Tianjin 300072，China，Tianjin University，Tianjin 300072，China，Tianjin University，Tianjin 300072，China |
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| 摘 要： | Thevibrationinducedbyiceisanimportantfactorofdamageforjacketplatforms ,sotheiceloadshavebeenthecontrolloadforjacketplatformsintheBohaiBay1] .Toreducedamageinducedbytheiceforce ,theloadsstandardofjacketplatformshasbeenimproved .Infact ,thestrengthofjacketplatformsagainststaticiceforceismeteasily .But,thesafetyproblemoftheplatformaf fectedbyboththebehaviorsofself excitedandcouplingissolvedbyothertechnologysolutions2— 3] .Xuetalde signedasetofdevicesforreducingvibrationofthejacketplatforminth…
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Vibration Control Induced by Ice of a Jacket Platform |
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| ZHENG Hong-yu,JIANG Da-ning,TANG You-gang,ZHOU Man-hong.Vibration Control Induced by Ice of a Jacket Platform[J].Transactions of Tianjin University,2003,9(4). |
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| Authors: | ZHENG Hong-yu JIANG Da-ning TANG You-gang ZHOU Man-hong |
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| Abstract: | Based on the self-excited vibration theory of ice, the vibration control technology of jacket platform is studied in this paper. The magnetorheological suspensions (MR) unit is chosen as the damper, the control objective function for vibration excited by ice is determined by instantaneous optimal control (IOC) method, and genetic algorithm (GA) is used to select the optimal control force. For the jacket platform of 40 m in height and a 3-floor deck, the vibration responses induced by ice have been calculated before and after control considering the different thickness and speed of ice. It is shown that the control method presented in this paper can reduce the vibration response by 30%, and it is feasible to adopt MR absorber and GA in the control of vibration induced by ice. |
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| Keywords: | jacket platform vibration response induced by ice vibration control magnetorheological suspensions technology |
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