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首页> 外文期刊>International journal of steel structures >Effect of Variation of Component Dimensions and Weld Profiles on the Free Vibration Response of Stiffened Plates
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Effect of Variation of Component Dimensions and Weld Profiles on the Free Vibration Response of Stiffened Plates

机译：零件尺寸和焊接轮廓变化对加筋板自由振动响应的影响

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摘要

This investigation focused on the variations observed in the natural frequencies of fabricated stiffened plates, due to the inherent variations obtained in dimensions of components and in the spacing between the girders of stiffened plates; also the variations in the size of weld profiles connecting the various components were taken into account. The present analytical study was based on the earlier experimental work done by Agung Budipriyanto (2005) in his PhD thesis. Both experimental and numerical investigations were carried out for determining the free vibration responses of the stiffened plates considered above. 99.73% confidence level of the normally distributed, measured data sets, lying between μ-3σ and μ+3σ were used to generate finite element analysis (FEA) models. The FEA models were categorized as models without and with weld profiles. From all the analyses, it was observed that the variation in dimensions of components of stiffened plates and in weld profiles produced a maximum variation in natural frequencies between -5.04% to +4.59%. If differences much larger than these differences (between the virgin and the present state) are observed during the dynamic monitoring of the ship, immediately more detailed diagnostic, prognostic and remedial measures should be instituted so that the operational sequences do not lead to further incapacitating damages in the ship.
机译：这项研究的重点是由于构件尺寸和加强板梁之间的间距所固有的变化，导致了在制造的加强板固有频率上观察到的变化。还考虑了连接各种部件的焊接轮廓尺寸的变化。本分析研究基于Agung Budipriyanto（2005）在其博士学位论文中所做的较早的实验工作。为了确定上述加劲板的自由振动响应，进行了实验和数值研究。正态分布的测量数据集的99.73％置信水平位于μ-3σ和μ+3σ之间，用于生成有限元分析（FEA）模型。 FEA模型被分类为不带和带有焊接轮廓的模型。从所有分析中观察到，加劲板部件尺寸和焊接轮廓的变化会导致固有频率的最大变化在-5.04％至+ 4.59％之间。如果在船舶动态监控期间观察到的差异远大于这些差异（在处女和当前状态之间），则应立即采取更详细的诊断，预后和补救措施，以使操作顺序不会导致进一步的丧失工作能力的损害在船上。

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