接触爆炸下波纹钢⁃混凝土板复合结构水下防爆效果评价

Evaluation of Underwater Explosion⁃proof Effect of Corrugated Steel⁃concrete Slab Composite Structure Under Contact Explosion

为探究不同波纹钢⁃混凝土板复合结构的水下抗爆防护效果,采用有限元⁃光滑粒子流体动力学耦合算法(FEM⁃SPH)建立水下多介质耦合爆炸模型;设计不同波纹钢⁃混凝土板复合结构防护方案,探究不同复合结构防护层(含3,6,9,12 mm厚波纹钢复合结构、含30°,45°,60°,75°波纹钢复合结构和含10,30,50,70 mm波高波纹钢复合结构)的水下削波吸能效果,并提出耗能分担率对复合结构进行防护效果评价。研究结果表明:混凝土板迎爆面与背爆面的模拟结果与试验结果较为吻合,验证了水下接触爆炸模拟过程;不同复合结构防护方案下,含12 mm厚波纹钢复合结构、含75°波纹钢复合结构和含70 mm波高波纹钢复合结构防护方案较无防护方案测点峰值压力最大降幅为63.2%,60%和57.9%,最大防护率分别为63.2%,60.0%和57.9%,耗能分担率为69.48%,66.26%和63.51%;最优型式(厚度为12 mm/夹角为75°/波高为70 mm)复合结构的削波吸能效果及防护效果均显著优于单一因素影响下的复合结构。研究成果可为不同波纹钢⁃混凝土板复合结构在水下抗爆防护领域的应用提供理论基础。

In order to explore the underwater anti⁃explosion protection effect of different corrugated steel⁃concrete composite structures,the finite element⁃smoothed particle hydrodynamics(FEM⁃SPH)coupling algorithm was used to establish an under⁃water multi⁃media coupling explosion model.Different corrugated steel⁃concrete slab composite structure protection schemes were designed to explore the underwater wave cutting and energy absorption effects of different composite structure protection layers,including 3,6,9,12 mm thick corrugated steel composite structure,30°,45°,60°,75°corrugated steel composite structure and 10,30,50,70 mm wave height corrugated steel composite structure.The energy consumption sharing rate was proposed to evaluate the protection effect of the composite structure.The results show that simulation results of the front and back explosion surfaces of the concrete slab are in good agreement with experimental results,which verifies the simulation pro⁃cess of underwater contact explosion.Under different composite structure protection schemes,the peak pressure of the compos⁃ite structure with 12 mm thick corrugated steel,the composite structure with 75°corrugated steel and the composite structure with 70 mm wave height is 63.2%,60%and 57.9%lower than that of the unprotected scheme,respectively.The maximum pro⁃tection rates are 63.2%,60.0%and 57.9%,respectively,and the energy consumption sharing rates are 69.48%,66.26%and 63.51%,respectively.The energy absorption effect and protection effect of the optimal composite structure with 12 mm thick⁃ness,75°angleand 70 mm wave height are significantly better than those of the composite structure under the influence of single factor.The research results can provide a theoretical basis for the application of different corrugated steel⁃concrete composite structures in the field of underwater anti⁃explosion protection.