基于Isight-MSC.Patran/Nastran联合仿真的弧形闸门动力模型修正  

Dynamic model updating for a radial gate based on simulation with Isight-MSC Patran/Nastran

作　　者：吴思远 王正中[2] 王岳[2] 徐超[2] 刘计良[3] 吴守军 WU Siyuan;WANG Zhengzhong;WANG Yue;XU Chao;LIU Jiliang;WU Shoujun(State Key Lab of Disaster Reduction in Civil Engineering,Tongji University,Shanghai 200092,China;Cold and Dry Regions’Water Engineering Safety Research Center,Northwest A&F University,Yangling 712100,China;Institute of Water Resources and Hydropower,Xi’an University of Technology,Xi’an 710048,China)

机构地区：[1]同济大学土木工程防灾国家重点实验室,上海200092 [2]西北农林科技大学旱区寒区水工程安全研究中心,陕西杨凌712100 [3]西安理工大学水利水电学院,西安710048

出　　处：《振动与冲击》2018年第19期62-68,共7页Journal of Vibration and Shock

基　　金：国家自然科学基金项目(51179164);国家科技支撑计划项目(2012BAD10B02);高等学校博士学科点专项科研基金项目(20120204110024)

摘　　要：为了获得精确的弧形闸门动力有限元模型,提出一种基于Isight-MSC. Patran/Nastran联合仿真与特征灵敏度优化相结合的快速建模方法。主要思路是在保证弧形闸门几何特征及动力特性一致情况下,通过软件联合调用实现质量重分布,以此得到相应的动力有限元模型。首先利用摄动法建立弧形闸门主框架目标模型,通过特征灵敏度优化方法迭代逼近,证明了该方法的有效性,进而通过与现有参数优化方法对比,说明了该方法在保证最小改变量的情况下,能够获取更为精确的有限元动力分析模型。在此基础上根据弧形闸门完全水弹性模型实测数据建立了相应的动力有限元模型,实例计算表明该方法只需较少的迭代步骤就可以实现精确建模。In order to obtain an accurate dynamic finite element(FE)model of a radial gate,a rapidly modeling method based on combining Isight-MSC Patran/Nastran simulation and Eigen-sensitivity optimization was proposed.The main idea was that under the condition of ensuring the radial gate’s geometric features and its dynamic characteristics being consistent,mass redistribution is realized through combined calling software to derive the corresponding dynamic FE model.Here,the perturbation method was used to establish the target model for the main frame of the radial gate,and prove the validity of this method through iteration and approaching using the Eigen-sensitivity optimization method.Furthermore,through comparing this method with existing parametric optimization methods,it was shown that the proposed method can be used to get a more precise FE dynamic analysis model under the condition of guaranteeing the minimum variation.Using this approach,a dynamic FE model was constructed according to the actually measured data for the full hydro-elastic model of a radial gate.Example calculations showed that the proposed method needs fewer iteration steps to realize accurately modeling.

关 键 词：弧形闸门 模型修正 特征灵敏度 ISIGHT MSC.Patran/Nastran 

分 类 号：TV34[水利工程—水工结构工程]