共查询到19条相似文献,搜索用时 23 毫秒
1.
基于Petri网的包装物流系统建模仿真与优化 总被引:3,自引:2,他引:1
采用离散事件动态系统理论和Petri网建模技术,研究包装物流系统建模、仿真与优化,描述和分析系统要素及逻辑序列.以纸箱包装物流系统为例进行建模、仿真,优化分析,获得了该系统的优化模型.结果表明,这种研究方法可行有效. 相似文献
2.
3.
阐述了企业生产线改造过程中精益思想应用的必要性,以及在生产线改造中需要遵循的精益原则:生产线平衡、连续流、产品混流生产和标准化管理。以水洗机为实例,分析了水洗机装配生产线的现状,基于传统思想与精益思想,使用面向对象的eM-Plant软件,建立相应的离散事件仿真模型,以产量、在制品和对市场的反应速度为绩效指标,研究和分析模型仿真进行的输出结果,对两种不同思想的生产线改造进行比较,为装配生产线实际改造提供依据。 相似文献
4.
5.
6.
7.
<正>0引言在现实世界中,事物并不是孤立存在的,虽然有的是离散的事件,但它们之间存在着内在的和有机的联系。作为一个研究对象,我们将这种由相互联系、相互作用的事物或元素构成的统一整体称为系统。当前,离散事件系统建模与仿真已不再只为专家们所关心,而发展成为广大工程技术人员和管理人员需要学习掌握的一项专门技术。它为各种各样的系统分析、战略研究、运筹规划和预测决策提供了一个强有力的工具。离散事件系统包含的事件发生在时间和空间上都是离散的,例如交通管理、生产自动线、计算机网络、通信系统和社会经济系统等都是离散事件系统。在这类系统中各事件以某种顺序或在某种条件下发生,并且大都是随机性的,不能用常规的方法加以研究,而需要建立仿真模型,通过仿真方法加以解决。 相似文献
8.
9.
以汽车发动机核心部件为对象,以在制品数量(WIP)为主要评价指标,重点研究回收件到达率、可再制造率、加工时间等不确定因素对缓冲区容量的影响.基于离散事件仿真技术建立系统动态运行模型,采用正交试验设计方法完成了仿真试验的方案设计.通过仿真再制造生产线动态平衡及缓冲区容量的内在变化规律,获得生产线优化运行所需的最小缓冲区容量.案例研究表明,所提出的方法能有效确定再制造系统缓冲区的最佳容量. 相似文献
10.
11.
12.
13.
基于先进制造模式的物流需求流动领导 总被引:1,自引:0,他引:1
在市场需求快速变化的条件下,物流管理要能适应经济的转轨和消费导向型生产。本文基于先进制造模式,提出了这一新的物流管理模式;需求流动领导,使企业的物流管理能够适应制造环境和顾客需求的变化。本文最后还阐述了需求流动领导型的物流管理对我国企业的启示2。 相似文献
14.
15.
Amlan Datta B. K. Mishra S. P. Das A. Sahu 《Materials and Manufacturing Processes》2008,23(2):195-202
Flow characteristics of material in hoppers, silos, and bins are critical issues for operational stability as well as structural integrity of these units. In this work, flow of noncohesive particles in hopper is studied using the discrete element method (DEM) where each particle is tracked for its position, velocity, and acceleration. Material properties tend to alter during hopper flow due to compaction, expansion, and segregation. These features are difficult to model with a continuum approach. In the first part, material flow patterns are correlated with hopper angle and hopper opening, the two main design parameters. The typical shift from mass flow to funnel flow depending on the hopper angle was successfully simulated. In the second part, the discharge rate of material was quantitatively analyzed as function of hopper design parameters. Beverloo model 1 was tested on these simulated flow rates and it was shown that the simulated flow rates follow the model for this specific granular system. However, the DEM analysis was also able to demonstrate the failure of the traditional Beverloo model in the restricted flow regime. Simulated flow rates also follow the empirical correlations with hopper angle as stated in literature. DEM simulations were validated with experimental data for both material flow pattern and discharge rates. 相似文献
16.
17.
Kimberly P. Ellis Russell D. Meller Joseph H. Wilck IV Pratik J. Parikh Franky Marchand 《国际生产研究杂志》2013,51(23):7195-7217
Effective material flow in an assembly facility leads to reduced material handling costs and increased productivity. This research focuses on improving the flow of materials for an assembly facility that receives supplied parts through receiving docks and transfers the parts to material storage locations and then to part usage locations. The locations of the receiving docks, storage locations, and line locations are predetermined, but the assignment of parts to dock locations and storage locations and the material flow paths through the facility are decision variables. Furthermore, design decisions such as the dock strategy employed and the configuration of the storage areas lead to additional decision variables. The goal is to reduce overall material handling costs by effectively receiving, storing and transferring the material from loading docks to line locations. The contribution of this research is in applying multi-commodity network flow models that integrate many of the sub-problems that are assumed to be solved a priori in many existing models. This integrated approach was used to evaluate configuration changes for a collaborating facility. One of the scenarios analysed showed an improvement in the material handling costs of nearly 10% as compared to current practices. 相似文献
18.