基于流固耦合的电缆中间接头防爆盒抗爆能力模拟研究

为分析内爆炸作用下电缆中间接头防爆盒的抗爆能力，建立了电缆中间接头在加装防爆盒情况下的数值模型，采用流固耦合的方法分别对防爆盒典型结构爆炸过程，不同中心半径比、不同端部半径比、不同形状、不同材料及是否灌装密封胶的影响进行了模拟研究。结果表明，防爆盒壳体上爆心环面及两端是承受爆炸冲击力最大的位置，应当重点防护；防爆盒的抗爆能力随着中心半径比的增大有较大增强，随着端部半径比的增大有较小增强；在相同中心半径情况下圆柱形防爆盒的抗爆能力强于阶梯形防爆盒；铝镁合金防爆盒在相同仿真条件下被炸开，其抗爆能力弱于不锈钢材质；灌装密封胶对防爆盒有较为明显的作用，其中灌装聚氨酯密封胶的表现略优于灌装环氧树脂密封胶。

Simulation research on anti-explosion capability of explosion-proof box of cable middle joint based on fluid-solid coupling

In order to analyze the anti-explosion capability of the explosion-proof box of the cable middle joint under the action of internal explosion, a numerical model of the cable middle joint with the explosion-proof box was established. The fluid-solid coupling method is used to simulate the explosion process of the typical structure of the explosion-proof box, and the influence of center radius ratios, end radius ratios, shapes, materials, and whether to fill sealant or not. The results show that the explosion center ring surface and both ends of the explosion-proof box shell are bearing the greatest impact, and should be enforced; the anti-explosion capability of the explosion-proof box increases a lot with the increase of the center radius ratio, and increases a little with the increase of end radius; the anti-explosion capability of the cylindrical explosion-proof box is better than stepped explosion-proof box under the same central radius; the aluminum-magnesium alloy explosion-proof box is blown up in the same simulation conditions, whose anti-explosion ability is worse than stainless steel; packing sealant helps a lot to the explosion-proof box, and the performance of filling polyurethane sealant is slightly better than that of filling epoxy sealant.