起重机结构件制造及整机总装物流系统分析与建模

发布时间：2018-07-18 17:06

【摘要】：与传统的连续型流水线生产不同,起重机的生产方式为离散型制造,而起重机制造物流系统是一个复杂的系统,具有随机性、动态性、异步性等特点,起重机的生产效能受多重复杂因素的影响,因此对起重机制造物流系统的研究具有一定的学术和工程实用价值。本论文以复杂系统科学为指导思想,从定性与定量两个方面深入研究了重机制造物流系统的复杂性;基于离散事件动态系统的建模方法,研究了起重机制造物流系统的静态结构和动态特性;基于仿真技术手段,结合生产实例,研究了起重机制造过程中出现的生产组织问题。具体来说做了以下几个方面的研究:(1)从系统的角度,对起重机制造基地的组成以及制造三个工艺流程进行了详细的分析;从起重机制造基地规模、平面布置、设备、工艺、生产调度、环境等多个方面对起重机制造物流系统的复杂性进行了定性分析。在此基础上,建立了系统静态复杂性的信息熵模型,以此来定量描述设备、工艺、平面布置等因素对系统复杂性的影响,并计算出了实例的静态复杂度。(2)基于离散事件动态系统理论,研究了起重机制造物流系统的TPCPN(在库所处时延的着色Petri网)模型。在考虑制造部分和配送部分的基础上,建立了起重机制造过程的单工位子系统的普通Petri网模型;将时间因素和色彩因素引入普通Petri网模型,并运用层次建模的思想,建立了起重机制造物流系统的TPCPN模型,并对TPCPN模型的触发规则以及动态特性进行了相应的扩展和分析。(3)基于仿真技术手段,对起重机制造物流系统进行了仿真研究。以Witness为仿真平台,建立了起重机制造物流系统的仿真模型;建立了起重机制造物流系统仿真模型的四个指标组成的评价体系;结合一门座起重机生产制造实例,进行了仿真试验和数据分析,研究了影响起重机生产效能的制造基地内部生产组织问题。本文的研究成果直接面向工程实际,有利于系统瓶颈的挖掘,为起重机制造基地的规划设计以及生产运营管理提供理论依据和决策支持。
[Abstract]:Different from the traditional continuous assembly line production, the production mode of crane is discrete manufacturing, and the crane manufacturing logistics system is a complex system, which has the characteristics of randomness, dynamic and asynchronous, etc. The production efficiency of crane is affected by many complex factors, so the research of crane manufacturing logistics system has certain academic and engineering practical value. In this paper, the complexity of manufacturing logistics system of heavy machinery is studied from two aspects: qualitative and quantitative, and the modeling method based on discrete event dynamic system. The static structure and dynamic characteristics of the crane manufacturing logistics system are studied, and the production organization problems in the crane manufacturing process are studied based on the simulation technology and the production example. Specifically, the following aspects of the research: (1) from the point of view of the system, the composition of the crane manufacturing base and three manufacturing processes are analyzed in detail, from the crane manufacturing base scale, plane layout, equipment, technology, The complexity of crane manufacturing logistics system is qualitatively analyzed from production scheduling and environment. On this basis, the information entropy model of the static complexity of the system is established to quantitatively describe the influence of the equipment, process, layout and other factors on the complexity of the system. The static complexity of an example is calculated. (2) based on the theory of discrete event dynamic system, the TPCPN (colored Petri net) model of crane manufacturing logistics system is studied. On the basis of considering the manufacturing part and the distribution part, the common Petri net model of the single station subsystem of the crane manufacturing process is established, the time factor and the color factor are introduced into the common Petri net model, and the idea of hierarchical modeling is used. The TPCPN model of crane manufacturing logistics system is established, and the trigger rules and dynamic characteristics of TPCPN model are extended and analyzed. (3) based on the simulation technology, the crane manufacturing logistics system is simulated. With Witness as the simulation platform, the simulation model of crane manufacturing logistics system is established, and the evaluation system of four indexes of crane manufacturing logistics system simulation model is established. The simulation test and data analysis are carried out, and the production organization problem in the manufacturing base which affects the production efficiency of crane is studied. The research results of this paper are directly oriented to engineering practice, which is conducive to the excavation of system bottlenecks, and provides theoretical basis and decision support for the planning and design of crane manufacturing base and production and operation management.
【学位授予单位】：武汉理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TH21

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