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Stress analysis due to internal explosion pressure of designed flameproof enclosure for hazardous area

机译：由于设计隔爆外壳的内部爆炸压力因危险区域的内部爆炸压力分析

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Flameproof (Ex d) enclosures are constructed in such a way that an internal ignition of a flammable atmosphere will not be transmitted outside the enclosure and thereby preventing the ignition of surrounding flammables. The large Ex d enclosure was designed for gas group IIB explosive atmosphere with the help of MATLAB and ANSYS software and further a study of stress analysis due to internal pressure had been carried out on the plates and cover by keeping the thickness of body plate and cover constant. The study showed that stress was observed more in the center of the plate and reducing toward the edges of plates. The value of the length and breadth ratio (a/b) was found out with the help of the curve fitting method to calculate maximum stress (σ_(max)) in the designed Ex d enclosure. The calculated maximum stress of all the plates was less than the simulated results, so the simulated results indicated that the designed enclosure is within the safety limit and suitable for hazardous area.
机译：防火（exd）外壳以这样的方式构造，即易燃气氛的内部点火不会在外壳外部传输，从而防止围绕易燃释放物的点火。借助Matlab和Ansys软件为Gas Group IIB爆炸性气氛设计了大型EX D外壳，并且通过保持体板和盖子的厚度，在板上进行了由于内部压力而导致的压力分析的研究不变。该研究表明，在板的中心观察到压力并朝向平板的边缘减小。借助曲线拟合方法的帮助，发现了长度和宽度比（A / B）的值，以计算设计的EX D外壳中的最大应力（Σ_（最大））。所有板的计算的最大应力小于模拟结果，因此模拟结果表明，设计的外壳位于安全限制内，适用于危险区域。

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