为了准确评估水舱结构的抗冲击性，提出一种冲击峰值和冲击有效持续时间可调的水下冲击载荷产生装置，并对2个典型壁面结构进行试验研究。试验结果表明，应力在材料屈服强度以下，试验件应变第四强度应力与冲击载荷峰值之间存在线性关系，且随着应力越接近屈服强度，拟合线性公式的均方差越大；应力超过材料屈服强度时，试验件塑性变形应力不仅与冲击载荷的峰值有关，还与冲击载荷波形和试验件结构形状有关；相比平面加筋结构，圆弧加筋结构具有更好的抗冲击性。
In order to accurately evaluate the impact resistance of water tank structures, a device for generating underwater impact loads with adjustable peak and effective duration of impact is proposed, and the experimental studies are conducted on two typical wall structures. The experimental results show that there is a linear relationship between the fourth strength stress of the specimen strain and the peak impact load when the stress is below the material yield strength, and as the stress approaches the yield strength, the mean square deviation of the fitted linear formula increases; When the stress exceeds the yield strength of the material, the plastic deformation stress of the test piece is not only related to the peak value of impact load, but also to the waveform of the impact load and the structural shape of the test piece. Compared to planar reinforced structures, circular reinforced structures have better impact resistance.
2024,46(9): 20-26 收稿日期：2023-07-04
DOI：10.3404/j.issn.1672-7649.2024.09.004
分类号：O342
基金项目：基础加强计划重点基础研究项目（2020-JCJQ-ZD-173-00-01）
作者简介：李治涛（1984 – ），男，博士，高级工程师，研究方向为水下载荷与环境
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