检索结果-南通市图书馆

SIMULATION OF 3-d deformation ANd MATERIAL FLOW dURING ROLL FORGING PROCESS USING SYSTEM OF OVAL-ROUNd GROOVE

Acta Metallurgica Sinica(English Letters) 2007年第5期20卷 380-384页

作者： G.H. Liu G.S. Ren C.G. Xu Beijing Research Institute of Mechanical ＆ Electrical Technology Beijing 100083 China Huazhong University of Science and Technology Wuhan 430074 China

Basing on the analysis of the traits of the roll forging process, a system-model of computer simulation has been established. Three-dimensional rigid-plastic FEM has been used for the simulation of the deformation process in the oval and round pass rolling, including the entering, rolling, and separating stages. The analysis was conducted using the deform-3d ver.5.0 code. The important information concerned with the deformation area characteristic, material flow, and velocity field has been presented. Otherwise, the location of the neutral plane in the deformation area was shown clearly.

关键词： numerical simulation 3-d deformation roll forging

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Spatiotemporal Evolution Analysis of the 3-d deformation Field of Land Subsidence in Beijing after the South-to-North Water diversion Project

引用

International Journal of Geosciences 2024年第11期15卷 891-910页

作者： Yanmin Su Haotong Wang Huili Gong Heilongjiang General Institute of Ecological Survey and Research Harbin China College of Resource Environment and Tourism Capital Normal University Beijing China Key Laboratory of the Ministry of Education Land Subsidence Mechanism and Prevention Capital Normal University Beijing China

The implementation of the South-to-North Water diversion Project (SNWdP) has alleviated groundwater resource pressure in North China to some extent, resulting in a gradual deceleration of land subsidence and even rebound in some areas. To investigate the spatiotemporal evolution characteristics of land subsidence in the eastern plain of Beijing following the SNWdP, this study employs Ascending (ASC) and descending (dES) InSAR data combined with a Strain Model (SM) to obtain a Three-dimensional (3-d) deformation field from 2016 to 2018. Through analysis of the 3-d deformation characteristics and spatiotemporal evolution of land subsidence in this region from 2016 to 2018, the results reveal a shift in the distribution of subsiding areas after the South-to-North Water diversion, with a marked decrease in subsidence rates in certain areas. The maximum subsidence rate in the Beijing area has decreased to 110 mm/yr, accompanied by horizontal deformation at a rate of 12 mm/yr. Additionally, by examining the spatial relationship between major active faults and subsidence deformation in this region, the study further elucidates the influence of fault activity on the spatial distribution of subsidence deformation.

关键词： Land Subsidence 3-d deformation Strain Model InSAR

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：