基于灵敏度分析的井架结构模型修正方法研究  

Research on Model Updating Method of Derrick Structures Based on Sensitivity Analysis

作　　者：刘金梅[1] 韩国有[1] 周国强[2] 

机构地区：[1]大庆石油学院机械科学与工程学院,大庆163318 [2]大庆石油学院秦皇岛分院井架检测国家计量认证重点实验室,秦皇岛066004

出　　处：《科学技术与工程》2009年第9期2366-2370,共5页Science Technology and Engineering

基　　金：中国石油天然气集团公司科学研究与技术开发项目(03B209000)资助

摘　　要：从井架结构模态参数对物理参数变化的灵敏度出发,探讨了井架结构的模型修正问题。以设计参数型模型修正方法为基础,对井架结构杆件的材料、截面形状和几何尺寸等参数进行直接修正。确定优化模型的目标函数及约束变量,利用一阶优化算法对结构参数进行了优化和状态评估。通过实验室简易井架模型的分析验证了此方法的可行性。该方法为复杂井架结构的损伤识别和状态评估提供了一个新思路。修正算法的优化方法采用ANSYS一阶优化方法,敏感性分析和模型修正完全基于ANSYS软件进行,适合于实际工程的应用。The model updating method of the derrick structure based on the modal sensitivity analysis is discussed. In this method, the design parameters of the derrick structure such as materials, cross-section shapes and geometric size are directly updated, the objective function and state variables of optimal model are determined, and the first-order optimization algorithm is used to optimize parameters and assess state. The method has been verified by experimental analysis of simple derrick model. This method provides a new idea for complex structural damage iden- tification and safety monitoring. It is suitable for practical engineering applications, because the first-order method of ANSYS optimization is used to update the FE model and the sensitivity analysis and model updating are completely based on ANSYS software.

关 键 词：井架结构 模型修正 灵敏度分析 损伤识别 模态参数 

分 类 号：TU311.3[建筑科学—结构工程]