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基于逆有限元法的船体加筋板结构位移场重构

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在船舶遭遇事故时,加筋板是最先受到载荷的结构,为了解该结构在动载荷作用下的位移场,以船体加筋板结构为对象,通过逆有限元法(iFEM)对结构在时域动态载荷作用下的位移场进行重构.先对其进行模态分析,确定其固有频率后对结构施加频率超过1阶固有频率的动态载荷,然后进行有限元动态响应模拟,将得到的节点位移结果作为参考解,并将应变数据作为逆有限元输入应变数据进行位移场重构.提出一种较精确的测点布置方案,与其他数量相近但布置方式不同的测点布置方案相比,该测点布置方案的位移场重构误差降低了一半以上,总体保持在5％以内.
Reconstruction of Displacement Field for Ship Hull Reinforced Plate Structure Using Inverse Finite Element Method
In marine accidents,the reinforced plate is the structure that initially bears the load.In order to understand the displacement field of this structure under dynamic loading,this paper focuses on the ship hull reinforced plate structure and reconstructs the displacement field under dynamic loading using the inverse finite element method(iFEM).Modal analysis is conducted initially to determine the natural frequencies,followed by the application of dynamic loads exceeding the first order natural frequency.Finite element dynamic response simulations are then performed,with the obtained nodal displacement results serving as reference solutions,and strain data utilized as input for inverse finite element displacement field reconstruction.A more accurate measuring point layout scheme is proposed.Compared with other measuring point layout schemes with similar numbers but different layout methods,the displacement field reconstruction error of this measuring point layout scheme is reduced by more than half,and the total displacement field reconstruction error is kept within 5％.

inverse finite element method(iFEM)ship hull reinforced platedisplacement field reconstructioniQS4 inverse elementmodal analysis

孙良晖、张慧虹、李至华、张猛

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哈尔滨工程大学烟台研究院学院,山东烟台 265502

上海船舶设备研究所,上海 200031

逆有限元法 船体加筋板 位移场重构 iQS4逆单元 模态分析

国家自然科学基金山东省自然科学基金黑龙江省自然科学基金烟台市科技计划项目中国核工业集团领创项目

52301365ZR2022QE106LH2023E0752023JMRH004KY90200220002

2024

10.13788/j.cnki.cbgc.2024.07.07

船舶工程
中国造船工程学会

船舶工程

CSTPCD北大核心
影响因子：0.406
ISSN：1000-6982
年,卷(期)：2024.46(7)