利用具有优化参数的 TMD 和多重危险下的 MR 阻尼器对海上张力支腿平台进行半主动接地钩控制

Suryasish Patra, Diptesh Das
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引用次数: 0

摘要

本研究的目的是推荐一种海上张力腿平台(TLP)半主动控制系统,以减轻风荷载、规则和不规则波浪等各种风险引起的振动。最新研究表明,在考虑到系统非线性因素并采用一种对不确定性有弹性的控制方法的同时,对面临多种危险的近海 TLP 进行半主动管理的研究还不多。本文提出了一种使用磁共振阻尼器的基于速度-位移的增量地钩(AVDB-GH)半主动控制方案,它是对基于位移的地钩(DB-GH)控制算法的改进。所提出的控制器采用半主动 TMD(SATMD),由一个被动调谐质量阻尼器(TMD)和两个半主动磁流变(MR)阻尼器作为控制装置。采用约束非线性优化方法确定 SATMD 的优化参数,以产生最佳控制性能。在时域和频域中都观察到 TLP 的浪涌响应明显降低。与使用普通 DB-GH 算法的 SATMD 相比,建议的控制策略更成功地降低了关键响应变量--甲板位移、功率谱密度和加速度。与不规则波浪和风力相比,该控制器对规则波浪的效果更好。由于控制器的性能不受 TLP 质量和刚度变化的影响,因此可以认为控制器具有鲁棒性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Semi-active Groundhook Control of Offshore Tension Leg Platforms using TMD with Optimized Parameters and MR Damper under Multiple Hazards
The purpose of the current study is to recommend an offshore tension leg platform (TLP) semi-active control system to lessen vibrations caused by various risks, such as the wind load and regular and irregular waves. State-of-the-art indicates that there has not been much study on semi-active management of offshore TLPs exposed to numerous hazards while taking into account system nonlinearities and employing a control method that is resilient to uncertainty. An Augmented Velocity-Displacement Based Groundhook (AVDB-GH) semi-active control scheme using MR dampers, which is an improvement over the displacement based Groundhook (DB-GH) control algorithm is proposed. The proposed controller uses a semi-active TMD (SATMD) consisting of a passive tuned mass damper (TMD) and two semi-active magneto-rheological (MR) dampers as the control devices. Constrained non-linear optimization is used to determine the SATMD's optimized parameters in order to produce the best control performance. A significant reduction in surge response of TLP is observed both in the time domain and the frequency domain. Compared to the SATMD using the usual DB-GH algorithm, the suggested control strategy more successfully decreases the key response variables—deck displacement, power spectral density, and acceleration. The effectiveness of the controller is better for regular waves than for irregular waves and wind forces. Because the performance of the controller is unaffected by changes in the mass and stiffness of the TLP, the controller can be regarded as robust.
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