建筑施工Petri网建模技术研究

Study on the Construction Modeling Based on Petri Net

本文基于网络计划采用赋时Perri网对施工计划建模进行了研究。Petri网能够以图形方式深刻、简洁地描述系统的动态过程,精确描述事件的顺序、并发和冲突关系,使系统形象化,有利于理解。网络计划技术已经在建筑工程实践中得到了广泛的应用,以网络计划为基础,采用Petri网对施工进度计划进行建模可以有效地降低施工建模的复杂性。本文首先讨论了网络计划和Petri网基本元素的对应关系,然后对Petri网进度计划模型的转变规则进行了研究,采用面向对象的技术分别对模型元素、元素之间的关系、模型的层次和性能评价分析的指标进行了讨论,从而确定了模型转换的机制。最后以具体工程实例说明了Petri网施工进度计划模型的生成,并对模型进行了分析,证明了采用本方法的有效性。

This paper presented a construction schedule modeling method based on network plan.Petri nets can profoundly and succinctly describe system's dynamic process in the graphic mode.The relationships of sequence, concurrent and conflict of events can be described precisely.By this way the system can be visualized and be advantageous to understand.The network plan has been applied in project management.Using the Petri net to model the construction schedule based on network plan has the possibility to reduce the complexity effectively.The elements correspondence relationships are discussed,then the transformation rule of the Petri net model has been investigated, the elements of model,relationships among elements,hierarchy of model and quota of performance evaluation are discussed using the object-oriented technology,thus the transform mechanism is determined.Finally, a case study is carried out to prove the validity of this method.