Reinforcing design of openings of a spherical explosive containment vessel
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摘要: 参考压力容器设计标准，针对某实验用球形爆炸容器进行了开孔补强设计，对容器开孔处等效应变随接管壁厚、补强圈尺寸的变化规律进行了数值计算，确定了“5/3倍球壳厚度的接管”配合“与球壳等厚度、张角10°的补强圈”的开孔补强设计方案。并对数值计算结果和补强设计进行了实验验证。Abstract: Reinforcing design for the opening on a certain experiment-used spherical explosive containment vessel was carried out referring to the pressure vessel code GB150-2011. The relationships between the effective plastic strain around the opening and the geometrical parameters of the nozzle and the reinforcing ring were investigated by numerical simulation. And a reinforcing scheme was proposed which included a nozzle with the wall thickness equal to 5/3 times of the wall thickness of the main spherical shell and a 10°-reinforcing ring with the same thickness to the main spherical shell wall. Experiments were performed to validate the reliability of the simulation results and the rationality of the reinforcing scheme.
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图 2 接管与球壳壁厚相等时球形容器开孔处的等效塑性应变
Figure 2. Effective plastic strain around the opening of the vessel with the wall thickness equal to that of the nozzle
图 3 不同接管壁厚下容器开孔处的等效塑性变形
Figure 3. Effective plastic strain around the opening of the vessel at different nozzle thicknesses
图 4 设计补强圈时容器开孔处的塑性变形(φs=5°)
Figure 4. Effective plastic strain around the opening of the vessel with a reinforcing ring (φs=5°)
图 5 设计补强圈时容器开孔处的塑性变形(φs=10°)
Figure 5. Effective plastic strain around the opening of the vessel with a reinforcing ring(φs=10°)
图 6 设计补强圈时容器开孔处的塑性变形(φs=15°)
Figure 6. Effective plastic strain around the opening of the vessel with a reinforcing ring(φs=15°)
图 7 实验用球形爆炸容器及其开孔补强设计
Figure 7. The explosive containment vessel used in the experiment and its reinforcing design
表 1 连接处等效应变随补强圈尺寸变化情况
Table 1. The effective strain of the junction varied with the geometrical size of the reinforcing ring
δH/H εj (εj, s-εj)/εj εj (εj, s-εj)/εj εj (εj, s-εj)/εj φs＝5° φs＝10° φs＝15° 0.5 0.081 -43% 0.067 -53% 0.057 -60% 1.0 0.043 -70% 0.022 -85% 0.020 -86% 1.5 0.020 -86% 0.008 -94% 0.009 -94% 
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表 2 厚壁接管配合补强圈计算结果(φs=10°)
Table 2. Simulation results of the model for the thick-walled nozzle with a reinforcing ring (φs=10°)
δH εr, max εn, max h/H=1 h/H=5/3 h/H=1 h/H=5/3 1.0H 0.022 0.012 0.057 0.021 1.5H 0.008 0.003 0.011 0.005
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