基于ABAQUS二次开发的可靠度计算程序的设计与应用

Design and Application of Reliability Calculation Program Based on Secondary Development of ABAQUS

ABAQUS作为有限元分析软件的一种,在非线性仿真领域有着非常广泛的应用,却无通用且成熟的可靠度计算模块。因此,建立了一种基于有限元模型进行Monte Carlo模拟的可靠度通用计算程序,以满足ABAQUS中各类结构的可靠度计算的自动化要求。首先,提出了ABAQUS中可靠度计算程序的设计思路及主要功能,主要包括随机数生成、模型批量建立、结果自动提取等功能。接着,采用Python语言对ABAQUS的前处理和后处理模块进行二次开发,将程序主要功能模块化。最后,以某简支钢桁架桥有限元模型的可靠度计算过程为例,详细阐述可靠度计算程序的使用方法。此可靠度计算程序能够有效提高结构可靠度计算过程中的自动化程度,减少计算时间,在工程应用方面具有较大的参考价值。

As a kind of finite element analysis software,ABAQUS is widely used in nonlinear simulation field,but there is no universal and mature reliability calculation module.Therefore,it is necessary to establish a general reliability calculation program for Monte Carlo simulation based on finite element model to meet the automation requirements of reliability calculation of various structures in ABAQUS.This paper firstly puts forward the design idea and main functions of reliability calculation program in ABAQUS,including random number generation,model batch building,automatic result extraction and so on;then,develops the pre-processing and post-processing modules of ABAQUS with Python language for modularizing the main functions of the program;finally,introduces the application method of this reliability calculation program in detail taking the reliability calculation process of the finite element model of a simply supported steel truss bridge as an example.This reliability calculation program can effectively improve the degree of automation in the process of structural reliability calculation,and reduce the calculation time,which has great reference value in engineering application.