混凝土声发射规律的协同学研究及可视化模拟

混凝土破裂过程中声发射现象能够很好地揭示混凝土破裂机理.首次利用协同学的基本原理,对混凝土破裂过程中声发射现象进行了探索性研究,并通过混凝土破裂过程中内部结构状态变化(损伤演化)和声发射特征的对应关系,从更深层次上认识混凝土的破裂机理.首先分析了混凝土声发射参数与损伤演化的关系,并以声发射事件计数率作为混凝土破坏过程的序参量,建立了混凝土声发射序参量的演化方程,求出了其定态和非定态解,并分析了其科学意义,对混凝土声发射的协同特征进行了全面描述.最后,应用RFPA软件对混凝土声发射进行模拟,首次应用数值模拟的方法验证了混凝土声发射的协同效应,从而进一步证实了研究结果的准确性和利用协同学研究混凝土声发射的可行性,为混凝土声发射技术的工程应用提供理论依据;同时,所做的数值模拟工作,也为混凝土破裂机理研究提供了新的手段,即数值试验手段.

Synergetic Study and Eyeable Simulation of AE Laws in the Course of Concrete Break

The AE phenomenoncan show the laws of concrete break well. Thispaper studies the AE in the course of concrete break with synergetics for the first time, opens out the laws of concrete break through the study of the relationship between AE and evolvement of concrete break. First, based on the analysis of this relationship, the equation of AE evolvement with the order parameter of AE counts is established. Then the steadyand unstableanswer of this equation is found and analyzed. The synergetic characteristic of concrete AE is described. Lastly, the authors simulate the AE phenomenonof concrete break with the software of RFPA, validate the above researches with numerical simulative method for the first time, offer new means to the study of concrete break and AE thus supplying an academicgist for engineering application of concrete AE technology.