矿用可移动救生舱优化设计

发布时间：2018-06-18 13:17

本文选题：矿用救生舱 + 频谱分析　；参考：《北京理工大学》2015年硕士论文

【摘要】：矿用可移动救生舱是在矿难发生时，为无法及时撤离的人员提供紧急避难空间的一种应急设备，救生舱必须具有足够的强度以抵抗瓦斯爆炸产生的高强度冲击波的作用。通常设计救生舱时，设计人员都是根据经验来布置加强筋，一般都是在原有救生舱结构下，通过增加构件的厚度来达到所要求的强度，这种方法即不合理又不经济。本文运用Ls-Dyna及Optistruct对救生舱进行了强度分析及结构优化，以寻求最优的结构布局，主要完成了以下几个方面的工作：（1）在Autodyn中建立瓦斯爆炸数值模型，模拟瓦斯爆炸时冲击波在巷道中的传播过程，获取救生舱各个部位相应的压力曲线，然后运用Matlab对超压曲线进行频谱分析，获取爆炸冲击波的频率成分和各频率分量大小。（2）本文以KJYF-96/10矿用可移动救生舱为基准模型，运用Pro/e建立救生舱三维实体模型，并在HyperMesh中建立矿用可移动救生舱有限元模型。（3）在Hypermesh中建立了三种不同约束方式的救生舱有限元模型，，运用Optistruct对这三种不同约束条件下的救生舱模型进行模态分析，用以寻求最合理的约束方式；然后运用Ls-Dyna计算救生舱的强度，获得救生舱在爆炸冲击波作用下不同时刻的位移云图和应力云图，依据矿用可移动救生舱通用技术要求，验证救生舱结构的安全性。（4）在有限元分析的基础上，引入拓扑优化的方法对救生舱舱体进行拓扑优化，得出结构的最佳传力路径，为救生舱的改进设计和结构轻量化提出了参考依据。首先运用Optistruct对单节救生舱和救生舱前后端面进行拓扑优化，获得单节救生舱和救生舱前后端面拓扑密度云图；然后根据拓扑优化结果，对单节救生舱舱段和救生舱前后端面的加强筋进行重新布局；最后将新设计各结构组装在一起，对新组装救生舱进行强度计算，验证新设计的救生舱结构强度。优化后的救生舱强度满足要求，质量减少了2.99吨，节约生产成本和运输成本，提高了经济效益。
[Abstract]:Mine movable lifebuoy is a kind of emergency equipment which can provide emergency shelter for people unable to evacuate in time in the event of mine accident. It must have sufficient strength to resist the high intensity shock wave caused by gas explosion. When designing lifebuoys, the designers usually arrange stiffeners according to experience, and generally achieve the required strength by increasing the thickness of the components under the original lifebuoy structure. This method is unreasonable and uneconomical. In this paper, Ls-Dyna and Optistruct are used to analyze the strength and optimize the structure of the lifebuoy in order to find the optimal structure layout. The main work is as follows: 1) the numerical model of gas explosion is established in Autodyn. In order to simulate the propagation process of shock wave in roadway during gas explosion, the corresponding pressure curve of every part of lifebuoy is obtained, and then the spectrum analysis of overpressure curve is carried out with Matlab. The frequency components and frequency components of the explosion shock wave are obtained. (2) in this paper, using the KJYF-96 / 10 mine movable lifebuoy as the reference model, the three-dimensional solid model of the lifebuoy is established by using Pro-e. The finite element model of mine movable lifebuoy is established in HyperMesh. The finite element model of three different restraint modes is established in HyperMesh. The modal analysis of the three lifebuoy models under different constraint conditions is carried out by Optistruct. Then Ls-Dyna is used to calculate the strength of the capsule, and the displacement cloud diagram and stress cloud diagram of the capsule at different times under the action of explosion shock wave are obtained, according to the general technical requirements of mine movable lifebuoy cabin, Verify the safety of the lifebuoy structure. (4) based on the finite element analysis, the topological optimization method is introduced to optimize the lifebuoy cabin, and the optimal load transfer path of the structure is obtained. It provides a reference for the improved design and lightweight structure of the lifebuoy. In this paper, we first use Optistruct to optimize the topology of the single lifebuoy and the front and rear surfaces of the lifebuoy, and obtain the topological density cloud diagram of the single lifebuoy and the front and rear surfaces of the lifebuoy, and then according to the topology optimization results, At last, the new structure is assembled together to calculate the strength of the newly designed lifebuoy to verify the strength of the newly designed lifebuoy. After optimization, the strength of the lifebuoy meets the requirement, the quality is reduced by 2.99 tons, the production cost and transportation cost are saved, and the economic benefit is improved.
【学位授予单位】：北京理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD774

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