Structure Design And Analysis Of Lifesaving Cabin Based On Finite Element Method

China’s coal resources which attracts the world’s attention is abundant in considerable. According to Second National Coal was predicted during the period between 1974 and 1980, The national coal reserves which in depth of less than 2,000 meters is up to 5.059219 trillion tons. China’s proven recoverable reserves ranks third in the world and coal mining industry reached nearly 10 million tons in 1996. The coal industry has become an important foundation for the rapid development of the national economy. But we have to mention a topic named mine that everyone is talking crazy while we are proud to coal power and coal economic.And the current technology of coal mine rescue equipment in China is relatively backward, so the probability miners can escape is very small once the mine outbreaks, which resulting in the death toll of coal mine accidents accounted for first in the world, and the mortality horizontal comparison that product one million tons of coal is still far higher than the world average level. Although the accident rate presents a declining trend obviously in recent years, it is still inevitable. Casualties due to mine safety accident not only caused thousands of families to misfortune, but also takes a serious impact on the goal of building a harmonious society. The fact indicates that relying solely on the mine rescue Inoue after mine outbreaks can’t reduce casualties effectively.Thus, in order to give a better protection to the lives and property safety of underground workers, we are now take a design optimization and an analysis to the mine rescue capsule. It can play a role of protecting the staff stranded in underground when happens some accidents in underground like gas leaks and flooding, which greatly improves the safety of underground work. The main contents are as follows:1, designing for the shape of the hull and analyzing for static loadFirstly, we take the cylindrical pods as the study object to which we will conduct analysis and designing in theory. And then we take the same parameters for the cabin whose cross-section is rapezoidal. The last we do a further comparative analysis by finite element analysis software ANSYS WORKBENCH. Knowledge obtained from the pressure vessel make we know that the pods were called film and the related stress got out according to the applied pressure were called stress-film stress when the thickness of the hull is very small compared with the other dimensions.We suppose that film stress uniformly distributed in the bulkhead section and tangentially acting on the surface. For pods subjected to external pressure, the stress that generated in the cabin wall presents a three-dimensional state and the three basic stress is radial stress σr, axial stress σa and tangential stress στ. Wherein, the radial stress that results from the pressure directly to the bulkhead generates a compressive stress which is equal to the pressure and is small when compared to others in thin-walled container. Therefore, it can be negligible in the design of the hull stress. So we assume that the stress state is two and design calculations according to the maximum stress theoretical. The analysis of the results will be discussed.2, analyzing for static load of cabin that whether with ribsConditions are very poor when underground mine outbreaks which accompanied by explosions, landslides, flooding and other disasters. The rescue capsule are relatively requirements highly in strength and stiffness because of that the shock wave of air pressure is very strong when the explosion outbreaks. But we can’t simply rely on increasing the thickness to improve its strength and stiffness. Because it not only cause difficulties for the production of life-saving module, but also cause the rescue capsule difficult to transport, lifting and assembly when life-saving cabin volume and quality increase which resulted from the too thick thickness. Therefore, this section discusses whether affiliate ribs to the rescue capsule. First, it conducts theoretical analysis and design with no ribs. Then it consults the manual metal material to select the stiffener material and selects the same parameters for saving space. Finally, it goes on further comparative analysis by finite element analysis software ANSYS WORKBENCH.3, designing for cabin frame structure and analyzing for static loadAccording to the characteristics that weight increases with big rescue capsule, it will save cost in producing to appropriately optimize cabin’s structure in pods under it meets compressive strength. Thus this section conducts optimizing of the pod housing skeletal structure. First it puts forward three kinds of different design options under concept of segmented modular design for rescue capsule cabin. Then it selects the same arguments for three different housing. It lastly conducts the finite element analysis to the x displacement, y displacement, z displacement and Mises stress of the equipment compartment housing, as well as discusses the analytical results.4, designing for the opening position of the door and analyzing for static loadLifesaving door is a very important part. It’s essential because it plays a key role that isolating internal and external of cabin when the explosion occurred in mine where will be a huge impact and noxious gases. Thus this section is provided on the main door opening position analysis of the problem. Thus this section will analysis the opening position of the door. Materials were selected according to their query Materials Handbook. Design ideas refers to the trapezoidal pods equivalent stress contours, which found the two end faces and the side of the pods in which the stress is relatively small can be designed as the position of the door. So we make the two bold hypothesis, then select the same parameters for it. Lastly we respectively make a further comparative analysis of opening positions in the two end faces and the side of the pods by the finite element analysis software ANSYS WORKBENCH.