随着中国改革开放,经济飞速发展,我国桥梁分别在桥梁建造技术、桥梁结构、高性能材料、信息化技术及标准规范等各方面取得了巨大成就,这也标志着我国桥梁建设正向着大跨径方向发展。连续体系桥具有跨中弯矩小、抗震和抗扭性能好等优点,R...随着中国改革开放,经济飞速发展,我国桥梁分别在桥梁建造技术、桥梁结构、高性能材料、信息化技术及标准规范等各方面取得了巨大成就,这也标志着我国桥梁建设正向着大跨径方向发展。连续体系桥具有跨中弯矩小、抗震和抗扭性能好等优点,Revit作为BIM的代表软件为房屋建筑提供了很大的便利,但是在复杂桥梁上面却显露出了很多弊端。而Dynamo具有强大的处理数据能力和空间异型构件的功能。本文基于Revit API技术,通过Visual Studio 2019平台,运用C#语言进行二次开发,通过界面开发分别从BIM模型中获取几何构造与物理信息,同时基于Revit模型进行网格划分,将BIM模型转换为有限元分析模型,大大的降低了有限元分析前处理的操作门槛,最后用连续刚构桥梁的工程实例验证了参数化建模以及模型转换接口的适用性和准确性。展开更多
蜗壳是水电站中常用的一种异形结构,其设计质量直接影响水电站的发电效率。为提高蜗壳设计效率及解决蜗壳后续加工的难点,综合利用Dynamo for Revit和Advance Steel软件各自的优点,提出了一种适用于水轮机蜗壳的快速设计方法。利用Dynam...蜗壳是水电站中常用的一种异形结构,其设计质量直接影响水电站的发电效率。为提高蜗壳设计效率及解决蜗壳后续加工的难点,综合利用Dynamo for Revit和Advance Steel软件各自的优点,提出了一种适用于水轮机蜗壳的快速设计方法。利用Dynamo的参数化建模功能,结合蜗壳设计公式,实现了蜗壳结构的快速化建模;再选用合理的数据交换格式将模型导入Advance Steel,经过处理后即可生成蜗壳钢结构加工所需要的各类视图及数据驱动文件,可直接用于蜗壳加工。所提出的方法也可推广应用于水利水电工程中类似异形钢结构部件的设计及加工。展开更多
The South Atlantic Anomaly(SAA)is a region where the geomagnetic field is significantly lower than that of the surrounding area.On the basis of the models of CHAOS-7.8,Mass Spectrometer Incoherent Scatter Model(NRLMSI...The South Atlantic Anomaly(SAA)is a region where the geomagnetic field is significantly lower than that of the surrounding area.On the basis of the models of CHAOS-7.8,Mass Spectrometer Incoherent Scatter Model(NRLMSISE-00),and International Reference Ionosphere 2016(IRI-2016),we theoretically investigated the lower and upper boundaries of the ionospheric dynamo region inside the SAA.In the ionospheric dynamo region,electrons are coupled with magnetic field lines,whereas ions are decoupled from magnetic field lines.Our results showed that the ionospheric dynamo region inside the SAA is higher and larger than that outside the SAA.We also studied the boundary variations of the dynamo region inside the SAA depending on the seasons and solar activities.We found that the dynamo region inside the SAA is the highest and largest in the summer of the southern hemisphere at solar maximum.The larger and higher altitude range of the ionospheric dynamo region in the SAA can contribute to the stronger ionospheric currents in this region.展开更多
文摘随着中国改革开放,经济飞速发展,我国桥梁分别在桥梁建造技术、桥梁结构、高性能材料、信息化技术及标准规范等各方面取得了巨大成就,这也标志着我国桥梁建设正向着大跨径方向发展。连续体系桥具有跨中弯矩小、抗震和抗扭性能好等优点,Revit作为BIM的代表软件为房屋建筑提供了很大的便利,但是在复杂桥梁上面却显露出了很多弊端。而Dynamo具有强大的处理数据能力和空间异型构件的功能。本文基于Revit API技术,通过Visual Studio 2019平台,运用C#语言进行二次开发,通过界面开发分别从BIM模型中获取几何构造与物理信息,同时基于Revit模型进行网格划分,将BIM模型转换为有限元分析模型,大大的降低了有限元分析前处理的操作门槛,最后用连续刚构桥梁的工程实例验证了参数化建模以及模型转换接口的适用性和准确性。
文摘蜗壳是水电站中常用的一种异形结构,其设计质量直接影响水电站的发电效率。为提高蜗壳设计效率及解决蜗壳后续加工的难点,综合利用Dynamo for Revit和Advance Steel软件各自的优点,提出了一种适用于水轮机蜗壳的快速设计方法。利用Dynamo的参数化建模功能,结合蜗壳设计公式,实现了蜗壳结构的快速化建模;再选用合理的数据交换格式将模型导入Advance Steel,经过处理后即可生成蜗壳钢结构加工所需要的各类视图及数据驱动文件,可直接用于蜗壳加工。所提出的方法也可推广应用于水利水电工程中类似异形钢结构部件的设计及加工。
基金supported by the National Natural Science Foundation of China(undergrant no.42122061)Macao Foundation+1 种基金the Project of Civil Aerospace“13th Five Year Plan”Preliminary Research in Space Science(grant nos.D020308 and D020301)the international partnership program of the Chinese Academy of Sciences(grant no.183311KYSB20200017)。
文摘The South Atlantic Anomaly(SAA)is a region where the geomagnetic field is significantly lower than that of the surrounding area.On the basis of the models of CHAOS-7.8,Mass Spectrometer Incoherent Scatter Model(NRLMSISE-00),and International Reference Ionosphere 2016(IRI-2016),we theoretically investigated the lower and upper boundaries of the ionospheric dynamo region inside the SAA.In the ionospheric dynamo region,electrons are coupled with magnetic field lines,whereas ions are decoupled from magnetic field lines.Our results showed that the ionospheric dynamo region inside the SAA is higher and larger than that outside the SAA.We also studied the boundary variations of the dynamo region inside the SAA depending on the seasons and solar activities.We found that the dynamo region inside the SAA is the highest and largest in the summer of the southern hemisphere at solar maximum.The larger and higher altitude range of the ionospheric dynamo region in the SAA can contribute to the stronger ionospheric currents in this region.