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I型金属夹芯板试验模型缩比关系影响分析
The influence analysis of scaling relation of I-type metal sandwich panel test model
- DOI:
- 作者:
- 李政杰1,2, 吴广明3, 胡嘉骏1,2, 赵南1,2, 刘俊杰1,2
LI Zheng-jie1,2, WU Guang-ming3, HU Jia-jun1,2, ZHAO Nan1,2, LIU Jun-jie1,2
- 作者单位:
- 1. 中国船舶科学研究中心，江苏 无锡 214082;
2. 深海技术科学太湖实验室，江苏 无锡 214082;
3. 中国舰船研究设计中心，上海201108
1. China Ship Scientific Research Center, Wuxi 214082, China;
2. Taihu Laboratory of Deepsea Technological Science, Wuxi 214082, China;
3. China Ship Development and Design Center, Shanghai 201108, China
- 关键词:
- I型金属夹芯板;极限承载能力;试验模型;缩尺比
type I metal sandwich panel; ultimate bearing capacity; test model; scaling factor
- 摘要:
- 为探索缩尺比对金属夹芯结构极限承载能力模型试验的影响规律，为典型金属夹芯结构试验模型的设计提供参考。针对I型金属夹芯板的单轴压缩问题，通过非线性有限元对不同板厚缩比、不同长度缩比组合下的缩比模型极限承载特性进行对比分析，以获取I型金属夹芯板缩比模型承载特性与缩尺比的关系。计算结果表明，板厚缩比与长度缩比相同时，不同缩比模型的极限承载特性成比例吻合；板厚缩比与长度缩比不一致时，板厚的变化将导致模型的失效模式产生偏差，降低缩比模型的计算结果吻合度，缩比模型的极限承载能力与缩尺比呈现非线性。因此，试验模型设计时应充分考虑缩尺比奇异性和承载特性非线性的影响，以提高缩比模型的相似度。
In order to explore the influence of scaling factor on the ultimate bearing capacity model test of metal sandwich structure, and provide reference for the design of typical metal sandwich structure test model. The nonlinear finite element method (NFEM) is used to analyze the ultimate load-bearing characteristics of I-type metal sandwich panel under uniaxial compression. The relationship between the load-bearing characteristics and the scaling of the scale model of the I-type metal sandwich panel is obtained. The results show that when the thickness scaling and the length scaling are the same, the ultimate bearing characteristics of different scale models are in proportion. When the thickness scaling is not consistent with the length scaling, the change of plate thickness will lead to the deviation of the failure mode of the model, and reduce the coincidence of the calculation results of the scale models, and relationship between the ultimate bearing capacity and scaling of the scale model are nonlinear. Therefore, the singularity of scaling factor and nonlinear bearing characteristics should be fully considered in the design of test model to improve the similarity of scale model.
2023,45(5): 67-71 收稿日期：2021-12-19
DOI：10.3404/j.issn.1672-7649.2023.05.012
分类号：U661.4
作者简介：李政杰(1986-),男,硕士,高级工程师。研究方向为船体结构强度与安全性评估
