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学者姓名：黄瑞源
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Abstract ：
Near-field underwater explosions generate complex load forms and cause destructive strikes on ships. To investigate the damage characteristics of ships under the combined effect of multiple loads, local and overall damage modes were first investigated through the combination of experimental tests and numerical simulation. Then a series of numerical simulations of full-scale ships subjected to near-field underwater explosions with different stand-off distances, equivalents, and detonation positions were carried out. The damage effects of shock wave, bubble pulsation, after flow, and water jet loads on ships were analyzed. The results show that the combined effects of different loads lead to different damage modes. Shock waves and after flow loads are the main cause of local damage and hogging damage, while pressure difference and bubble adsorption are the main reasons for the hogging damage. Finally, a criterion was proposed to determine the damage modes of ships under near-field underwater explosions.
Keyword ：
CEL method CEL method Full-size ships Full-size ships Near-field underwater explosion Near-field underwater explosion Numerical simulation Numerical simulation Ship damage modes Ship damage modes
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| GB/T 7714 | Huang, Ruiyuan , Jiang, Yipeng , Qin, Jian et al. Investigation on the coupling damage effects of ships subjected to near-field underwater explosion loads [J]. | MARINE STRUCTURES , 2024 , 98 . |
| MLA | Huang, Ruiyuan et al. "Investigation on the coupling damage effects of ships subjected to near-field underwater explosion loads" . | MARINE STRUCTURES 98 (2024) . |
| APA | Huang, Ruiyuan , Jiang, Yipeng , Qin, Jian , Meng, Xiangyao , Chi, Hui , Yang, Xiaoqiang et al. Investigation on the coupling damage effects of ships subjected to near-field underwater explosion loads . | MARINE STRUCTURES , 2024 , 98 . |
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In Split Hopkinson Pressure Bar (SHPB) tests, the size effect is a significant factor influencing the dynamic mechanical properties of concrete-like materials. To investigate the impact of size effect on concrete strength, this study conducted dynamic compression tests on concrete specimens of different sizes using a Phi 74 mm SHPB test device. The results indicated that concrete material exhibited a significant strain rate effect and size effect. Based on test results, the Holmquist-Johnson-Cook (HJC) model considering the strain rate effect was used for numerical analysis, with improvement made to the strain rate effect term. Different-sized numerical simulation models were established using Abaqus software, and parameterized analysis of specimen sizes was conducted based on theory and simulation results to determine the optimal specimen size. Based on the analysis results and considering the synergistic effect of strain rate effect and size effect, a size-modified coefficient was introduced into the constitutive model to establish a calculation model for the size effect of dynamic compression in concrete. The model considering the size effect could effectively predict test results.
Keyword ：
Concrete Concrete Constitutive model Constitutive model Inertia effect Inertia effect SHPB SHPB Size effect Size effect
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| GB/T 7714 | Guan, Zhenhuang , Li, Yi , Lai, Zhichao et al. Size effect of concrete based on split Hopkinson pressure bar (SHPB) test [J]. | CONSTRUCTION AND BUILDING MATERIALS , 2024 , 441 . |
| MLA | Guan, Zhenhuang et al. "Size effect of concrete based on split Hopkinson pressure bar (SHPB) test" . | CONSTRUCTION AND BUILDING MATERIALS 441 (2024) . |
| APA | Guan, Zhenhuang , Li, Yi , Lai, Zhichao , Zhou, Hao , Qin, Jian , Wen, Yanbo et al. Size effect of concrete based on split Hopkinson pressure bar (SHPB) test . | CONSTRUCTION AND BUILDING MATERIALS , 2024 , 441 . |
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With the advancement of weapon systems, high-strength concrete (HSC) has been extensively utilized in protective engineering. To investigate the damage characteristics of HSC under impact resistance, this study first conducted Split Hopkinson Pressure Bar (SHPB) tests on HSC, along with cyclic loading and unloading tests. Based on the test data of SHPB and cyclic loading and unloading, the original Holmquist-Johnson-Cook (HJC) model was adjusted accordingly. Additionally, tungsten alloy bullet penetration tests on concrete plates with different initial velocities were performed to measure the depth of penetration (DOP) and crater area corresponding to each velocity. A numerical model was then established using Abaqus software. The test results and numerical simulations were compared and analyzed, demonstrating that the predicted results closely matched the test, with a DOP error margin of less than 10 %. This confirmed the feasibility and accuracy of the modified model and its parameters. Finally, the results of numerical simulation were used to analyze the mechanical properties of HSC during impact resistance.
Keyword ：
Constitutive model Constitutive model High-strength concrete High-strength concrete Numerical simulation Numerical simulation Projectile penetration Projectile penetration
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| GB/T 7714 | Guan, Zhenhuang , Lai, Zhichao , Qin, Jian et al. Mechanical properties of high-strength concrete (HSC) under projectile penetration [J]. | CONSTRUCTION AND BUILDING MATERIALS , 2024 , 442 . |
| MLA | Guan, Zhenhuang et al. "Mechanical properties of high-strength concrete (HSC) under projectile penetration" . | CONSTRUCTION AND BUILDING MATERIALS 442 (2024) . |
| APA | Guan, Zhenhuang , Lai, Zhichao , Qin, Jian , Chen, Yufan , Wen, Yanbo , Huang, Ruiyuan . Mechanical properties of high-strength concrete (HSC) under projectile penetration . | CONSTRUCTION AND BUILDING MATERIALS , 2024 , 442 . |
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In this study, underwater explosion tests with 2.5 g trinitrotoluene explosive under different fixed plates with prefabricated holes were conducted. The experimental results showed that the air inflow from the prefabricated hole caused the bubble to collapse earlier with an increase in the hole diameter. In addition, the deformation mode of the thin plate transitioned from "convex" to "concave" (up to down). Next, the coupled Eulerian-Lagrangian method was used to perform the corresponding numerical simulation. The accuracy of the numerical simulation method was verified through a comparison with the experimental data. In addition, a series of numerical simulations were conducted with different prefabricated-hole diameters, blast distances, and prefabricated-hole shapes. The results showed that the bubble-pulsating water jet substantially influenced the deformation of the thin plate when the diameter of the prefabricated hole was within the theoretical maximum bubble radius. When the blast distance was within the theoretical maximum bubble radius, the thin plate was subjected to only a single bubble pulsation owing to the air inflow from the prefabricated hole.
Keyword ：
Bubble pulsation Bubble pulsation Fixed plate Fixed plate High-speed camera High-speed camera Hole Hole Underwater explosion Underwater explosion
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| GB/T 7714 | Chen, Si , Qin, Jian , Meng, Xiangyao et al. Study on the mechanism of near-field underwater explosion on supported thin plates with prefabricated holes [J]. | ACTA MECHANICA SINICA , 2024 , 40 (8) . |
| MLA | Chen, Si et al. "Study on the mechanism of near-field underwater explosion on supported thin plates with prefabricated holes" . | ACTA MECHANICA SINICA 40 . 8 (2024) . |
| APA | Chen, Si , Qin, Jian , Meng, Xiangyao , Lai, Zhichao , Wen, Yanbo , Huang, Ruiyuan . Study on the mechanism of near-field underwater explosion on supported thin plates with prefabricated holes . | ACTA MECHANICA SINICA , 2024 , 40 (8) . |
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Abstract ：
采用实验与数值模拟相结合的方法，研究了不同长径比的柱形装药在固支方板下爆炸气泡动力学行为；对质量2.5g、长径比分别为1∶1和2∶1的TNT炸药进行了水中固支方板下的爆炸实验，利用高速摄影记录爆炸气泡演化图像；使用ABAQUS软件对长径比为5∶1、10∶1、20∶1的柱形装药，在竖直与水平设置条件下的水下爆炸气泡演化过程进行了数值模拟。结果表明，炸药长径比为1∶1和2∶1时，爆炸气泡演化现象无明显差别。当药柱竖直放置时，由于炸药长径比不同导致的爆炸气泡初始形态差异，会在气泡演化过程中迅速消弭；但长径比与起爆位置都对射流速度有不同程度的影响；当药柱水平放置时，起爆点位置会影响气泡的对称性和水射流形态；药柱端部起爆时，气泡膨胀过程的形态略微不对称，水射流向起爆点方向偏移；炸药长径比越大爆炸水射流在气泡内部越宽，并且水射流的载荷越小；药柱中心起爆时，爆炸气泡产生竖直向上的水射流，不发生偏移。
Keyword ：
固支方板 固支方板 柱形装药 柱形装药 水下爆炸 水下爆炸 水射流 水射流 爆炸力学 爆炸力学 爆炸气泡 爆炸气泡 长径比 长径比
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| GB/T 7714 | 刘元凯 , 秦健 , 迟卉 et al. 不同长径比柱形炸药水下爆炸气泡动力学行为特性 [J]. | 火炸药学报 , 2024 , 47 (01) : 51-63 . |
| MLA | 刘元凯 et al. "不同长径比柱形炸药水下爆炸气泡动力学行为特性" . | 火炸药学报 47 . 01 (2024) : 51-63 . |
| APA | 刘元凯 , 秦健 , 迟卉 , 孟祥尧 , 文彦博 , 黄瑞源 . 不同长径比柱形炸药水下爆炸气泡动力学行为特性 . | 火炸药学报 , 2024 , 47 (01) , 51-63 . |
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The current research on the cavitation phenomenon in the underwater explosion process is focused on the shock wave phase. In this study, it was found that there was also significant cavitation during bubble pulsation. Underwater explosion experiments were carried out at the bottom of a sheet using 2.5 g of TNT, which also showed that: (a) Cavitation lasts for the same duration as the bubble contraction time, (b) A cavitation closure pressure, the peak of which is greater than the bubble pulsation pressure, is produced by the closing of the cavitation zone. A tensile cut-off model was introduced to simulate the cavitation phenomenon during bubble pulsation, and the formation mechanism was investigated. The numerical simulation results show that: (a) The cavitation phenomenon is visible when the sheet above the explosive and the explosion distance are between 0.93 and 1.17 times the radius of the largest bubble, or between 0.69 and 1.85 times the maximum radius of the bubble when the sheet below the explosive, (b) The cavitation region and cavitation closure pressure increase and decrease with increasing explosion distance, peaking at a value close to one times the theoretical maximum bubble radius, and (c) The cavitation zone shrinks and the cavitation closing pressure drops as sheet thickness increases.
Keyword ：
Bubble pulsation Bubble pulsation Cavitation Cavitation Near-field Near-field Underwater explosion Underwater explosion
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| GB/T 7714 | Wen, Yanbo , Qin, Jian , Lai, Zhichao et al. Experimental and numerical simulation investigation of cavitation phenomenon during bubble pulsation process [J]. | INTERNATIONAL JOURNAL OF IMPACT ENGINEERING , 2024 , 186 . |
| MLA | Wen, Yanbo et al. "Experimental and numerical simulation investigation of cavitation phenomenon during bubble pulsation process" . | INTERNATIONAL JOURNAL OF IMPACT ENGINEERING 186 (2024) . |
| APA | Wen, Yanbo , Qin, Jian , Lai, Zhichao , Meng, Xiangyao , Yang, Xiaoqiang , Chi, Hui et al. Experimental and numerical simulation investigation of cavitation phenomenon during bubble pulsation process . | INTERNATIONAL JOURNAL OF IMPACT ENGINEERING , 2024 , 186 . |
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The cavitation phenomenon caused by near-field underwater explosion imposes a secondary loading on ship structures. Studying the cavitation effects of plates during underwater explosions has implications for ship protection since plate is a typical structure of ships. This paper experimentally investigated the behavior of fixed square plates subjected to near-field underwater explosions. Experimental results indicated that cavitation existed in both shockwave and bubble pulsation stages; and the cavitation closure load at bubble pulsation stage was measured. To further investigate the cavitation phenomenon and the load characteristics at the bubble pulsation stage, finite element models were developed. The numerical results show that cavitation will increase the bubble load impulse by 47 % under specific conditions. These models were then used to investigate the influence of the stand-off distance and charge weight on cavitation area and load characteristics. An empirical formula was finally proposed to predict the coupled impulse of cavitation closure, bubble pulsation and water jet. This research has practical guidelines for the protection design of ship structures.
Keyword ：
Bubble pulsation Bubble pulsation Cavitation Cavitation Impulse Impulse Load Load Underwater explosion Underwater explosion
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| GB/T 7714 | Huang, Ruiyuan , Chen, Yufan , Qin, Jian et al. Investigation on cavitation phenomena and load characteristics of fixed square plates subjected to near-field underwater explosion [J]. | OCEAN ENGINEERING , 2024 , 295 . |
| MLA | Huang, Ruiyuan et al. "Investigation on cavitation phenomena and load characteristics of fixed square plates subjected to near-field underwater explosion" . | OCEAN ENGINEERING 295 (2024) . |
| APA | Huang, Ruiyuan , Chen, Yufan , Qin, Jian , Meng, Xiangyao , Wen, Yanbo , Yang, Xiaoqiang et al. Investigation on cavitation phenomena and load characteristics of fixed square plates subjected to near-field underwater explosion . | OCEAN ENGINEERING , 2024 , 295 . |
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Concrete is a strain rate sensitive material, which is widely used in protective structures, and its strain rate effect needs to be considered. This study aims to obtain the real strain rate effect of concrete material. Firstly, the dynamic compression test of concrete was carried out by using split Hopkinson pressure bar (SHPB). The classical Holmquist-Johnson-Cook (HJC) model of concrete is modified based on the test results and the test data of the static performance of concrete. Then the finite element model is established. The numerical simulation results and theoretical analysis show that the inertia effect leads to the error between the test value and the simulation value. To eliminate the influence of inertia effect, this study embeds the inertia effect term into the constitutive model for secondary modification. According to the results of numerical analysis, the specific form of this term and its related parameters are determined. The modified constitutive model can better predict the test results and reproduce the damage morphology of concrete under impact load.
Keyword ：
Concrete Concrete Constitutive model Constitutive model Inertia effect Inertia effect SHPB SHPB Strain rate Strain rate
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| GB/T 7714 | Huang, Ruiyuan , Guan, Zhenhuang , Qin, Jian et al. Strain rate effect of concrete based on split Hopkinson pressure bar (SHPB) test [J]. | JOURNAL OF BUILDING ENGINEERING , 2024 , 86 . |
| MLA | Huang, Ruiyuan et al. "Strain rate effect of concrete based on split Hopkinson pressure bar (SHPB) test" . | JOURNAL OF BUILDING ENGINEERING 86 (2024) . |
| APA | Huang, Ruiyuan , Guan, Zhenhuang , Qin, Jian , Wen, Yanbo , Lai, Zhichao . Strain rate effect of concrete based on split Hopkinson pressure bar (SHPB) test . | JOURNAL OF BUILDING ENGINEERING , 2024 , 86 . |
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针对水下爆炸过程中产生的空化效应会对舰船板结构产生二次加载作用，对结构的毁伤不可忽略，并且空化特性与爆炸的方位角和板的曲率等情况显著相关。采用实验与数值模拟相结合的方法，研究了不同爆炸方位角和不同板曲率对空化特性以及板的动态响应的影响；通过对比不同爆距下的气泡和空化演化过程，验证了数值方法的准确性。结果表明，爆炸方位角在0°～90°之间时，空化区域的体积随方位角的增大先减小后增大，气泡和射流的方向受板的影响向板偏移；气泡脉动水射流和空化的耦合作用对板的动态响应占主导作用，方位角等于60°时可达总应变的73.15%;爆炸方位角会影响板的动态响应，临界方位角在45°附近，此时板的位移和等效塑性应变最大；板的曲率会显著影响空化现象，曲率越大空化现象越难发生，空化区域体积越小，板的动态响应随曲率的增大而减小，且减小率也随之减小。
Keyword ：
动态响应 动态响应 曲率 曲率 水下爆炸 水下爆炸 爆炸力学 爆炸力学 爆炸方位角 爆炸方位角 空化效应 空化效应
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| GB/T 7714 | 陈钰帆 , 黄锡堤 , 赖志超 et al. 板结构水下爆炸下的空化特性 [J]. | 火炸药学报 , 2024 , 47 (08) : 714-729 . |
| MLA | 陈钰帆 et al. "板结构水下爆炸下的空化特性" . | 火炸药学报 47 . 08 (2024) : 714-729 . |
| APA | 陈钰帆 , 黄锡堤 , 赖志超 , 秦健 , 孟祥尧 , 文彦博 et al. 板结构水下爆炸下的空化特性 . | 火炸药学报 , 2024 , 47 (08) , 714-729 . |
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目的 不同密度的硬质聚氨酯泡沫（RPUF）适用于不同的工程应用，通过对不同密度RPUF力学性能开展研究，并对现有的本构模型加以修正，得到材料真实的本构关系。方法 通过开展不同密度RPUF材料的准静态压缩实验（0.001s-1）及不同加载速率（100～1000s-1）下的动态压缩力学性能实验，得到材料的应力-应变曲线，在此基础上分析RPUF材料的密度效应及应变率敏感性，得到其真实本构关系。结果 RPUF材料力学性能受到密度和应变率的耦合影响，随着密度以及应变率的增大，RPUF材料的屈服应力呈指数函数形式增大；给出了RPUF材料屈服应力与应变率及密度之间的函数关系式。结论 得到了基于实验数据以及横向惯性效应修正后的Sherwood-Frost模型（M-S-F模型），研究结果可为RPUF材料在抗冲击方面的工程应用提供指导。
Keyword ：
压缩力学性能 压缩力学性能 密度效应 密度效应 应变率效应 应变率效应 本构关系 本构关系 硬质聚氨酯泡沫塑料 硬质聚氨酯泡沫塑料
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| GB/T 7714 | 刘欢 , 黄瑞源 , 马佳佳 et al. 不同密度硬质聚氨酯泡沫的力学性能和本构关系 [J]. | 包装工程 , 2024 , 45 (11) : 282-290 . |
| MLA | 刘欢 et al. "不同密度硬质聚氨酯泡沫的力学性能和本构关系" . | 包装工程 45 . 11 (2024) : 282-290 . |
| APA | 刘欢 , 黄瑞源 , 马佳佳 , 刘元凯 , 柏绍波 , 王成 . 不同密度硬质聚氨酯泡沫的力学性能和本构关系 . | 包装工程 , 2024 , 45 (11) , 282-290 . |
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