3DEC V4.1版本新特征及升级方案(2007年11月10日)
发布时间: 2007-11-01 新闻来源: 中仿科技3DEC Version 4.1 has the following new features.
(3DEC V4.1版本新特征, 2007年11月10日)
Itasca公司于2007年11月正式发布3DEC最新的 V4.1版本，新版本软件在功能上有了很大的改进和提高：
1、自定义节理本构模型(UDJM)：用户可以通过高级程序语言自定义节理本构模型并编译成动态链接库文件(DLL)，3DEC提供了调用动态链接库文件的接口。
2、改进的节点混合离散算法(NMD)：在最新V4.1版本中，节点混合离散算法(NMD)克服了在四面体网格模型在塑性流动中产生的“刚化”现象，为塑性分析提供了更为可靠的精度保证。该算法支持在当前常用的实体建模软件中生成的四面体网格模型。
3、支持64位处理系统：V4.1版本系列可在64位计算机上运行，包括Windows XP/XP64以及最新视窗操作系统Vista。3DEC可以在64位处理器上指定虚拟模型尺寸(最大寻址空间为17GB)。
4、安全系数计算：新命令SOLVE fos提供了求解常见的破坏现象如破坏及坍塌等安全系数的有效途径。
5、改进的自定义节理模型：所有的模型动态连接文件均存贮在“Plugins”目录下，并在程序运行期间由程序自动加载。在算法上，V4.1版本采用了严格的控制技术以防止动态连接文件彼此发生冲突。
6、改进的结构单元算法：新版本中使用了最新的结构单元算法，它能够简化衬砌结构单元的定位进程。
7、加强交互式用户图形界面：新版本3DEC用户界面使用了更快速的基于OpenGL的模型渲染功能，以加速模型视图的旋转和平移等可视化操作。新版本除了在界面中内嵌具有语法提示以及一键执行的命令文本编辑器外，还提供了易于模型显示、视图控制以及区域定义等交互式操作工具。此外，也可以完全用菜单驱动能够实现对文件的控制。
8、增强了FISH语言功能：新版本3DEC软件对FISH语言进行了修订，并增加了程序调试、调试无必要情况下关闭安全模式、在函数中创建局部变量以及动态地创建或者删除FISH数组等功能。除此之外，自定义FISH介绍可以以C++动态链接文件的形式创建。
9、网络操作功能加强：除了单机版本之外，新版本的网络操作功能允许在局域网服务器中安装单个软件狗，并在网络中的其他机器上对其实现成功调用，调用的最大机器数目取决于网络版软件的节点数。
10、新版 PGEN 接口：新版3DEC软件集成了全新的图形界面PGEN接口，该接口允许用户导入DXF文件中的3D图形信息，并在此基础上建立3DEC模型。
11、完善了HTML 编译帮助系统：编译帮助系统包含了命令参考、FISH参考以及应用范例等3DEC手册中部分内容，帮助程序可通过3DEC界面中的“Help”菜单直接调用。
Release Note: Version 4.1 supersedes version 4.0 as the official pre-release of 3DEC. Current pre-release 4.0 users are entitled to use version 4.1 and, when the official release is available, will receive this version. Version 4.0 users should note that the hardware lock will need to be updated to operate version 4.1. Please contact Itasca for further information or assistance with updating your hardware lock.
3DEC 4.1 pre-release has the following new features:
This feature allows the user to create joint constitutive models that are compiled as DLL files and are linked into 3DEC during execution.
The new Nodal Mixed Discretization (NMD) technique provides more accurate solutions for plasticity analyses with models composed of linear tetrahedral zones, overcoming the over-stiff behavior observed during plastic flow with this type of zone. NMD allows for the use of tetrahedral mesh generation tools available in current solid modeler programs.
Version 4.1 includes a version (in addition to the 32-bit version) that is operable on a 64-bit processor computer running the Windows XP X64 or Windows Vista 64-bit operating systems. The 64-bit version will allow a virtually unlimited model size (17 billion GB of addressable memory).
The new command SOLVE fos provides the option to solve a model to determine the factor of safety against general failure or collapse.
All Dll models stored in the "plugins" directory are automatically loaded at runtime. Strict controls have been implemented to avoid confusion between Dlls.
New logic has been added which simplifies the task of defining locations for structural element liners.
The new 3DEC interface features faster, OpenGL-based model rendering for rapid rotation and tranlsation of model views. In addition the interface includes a built-in data file editor with syntax highlighting and one-click execution, easier access to tools for plotting, interactive tools for view manipulation and range definition, complete menu-driven access to all 3DEC file handling operations, and new attributes for plot items including transparency.
Revisions to the FISH language include a new debugging capability, the ability to optionally disable SAFE mode if debugging is unnecessary, the ability to pass arguments to FISH functions, the ability to create local variabes in a function, and the abilty to dynamically create and destroy FISH arrays. In addition, user-defined FISH intrinsics can be created as C++ dlls.
In addition to the standard per-machine license, the new network key facility allows a single hardware key to be installed on a central (server) computer for a network. 3DEC is run from any computer on the network — depending on the number of licenses available from the key. Network keys require a special licensing arrangement and installation.
In addition, the following new features will be incorporated into 3DEC 4.1, but are not implemented in the pre-release at this time.
A new graphical interface has been added to the PGEN utility. This new interface allows the user to import 3D surface information from DXF files and use those surfaces as a template to build a 3DEC model.
A compiled help file containing the Command Reference, FISH Reference, and Example Applications volumes from the 3DEC Manual will be available on 3DEC's "Help" menu.
由于美国总部3DECV4.1新版本发布，全球价格上调。从2007年11月01日开始中国区的销售价格也适当上调。同时3DEC的旧版本用户请和我们联系，以便我们提供新版本的升级解决方法。谢谢您一直以来对中仿科技的支持。
中仿科技有限公司是Itasca系列软件(FLAC、FLAC3D、FLAC/Slope、UDEC、3DEC、
PFC2D和PFC3D等)在中国地区的指定代理商，希望Itasca系列软件能给您的工作带来帮助。
如果您希望了解关于Itasca系列软件的产品信息、软件升级信息，请及时与我们联系：
中仿信息科技有限公司
电 话：021-64391516
传 真：021-64391506
E-MAIL: info@cntech.com.cn
网 址：www.CnTech.com.cn
地 址: 上海市徐汇区凯旋路3500号华苑大厦2号楼11层A座
邮 编：200030
