flac3d5.0结构单元教程

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flac结构单元用法

flac结构单元用法本人没有做过桩锚或桩＋支撑的围护形式，不知道pile单元在靠近开挖面一侧当土体被开挖时，pile于土体的接触会是什么样子？（1）cable单元模拟锚杆（全长连接、非全长连接，预应力锚杆），土钉等（2）beam单元模拟支撑、围檩、冠梁等（3）liner单元模拟面层，地下连续墙（4）pile单元模拟钻孔灌注桩，SMW工法，超前支护（注浆钢管、微型桩），抗滑桩等。

一般的搅拌桩可用zone＋interface解决。

FLAC学习总结一个在使用flac3d的兄弟(QQ:65006196)1、得到初始应力的方法：方法1、可以先给一些材料参数很大的值，进行初始求解，在计算之前再将材料参数设为正常值，即可。

如在手册中给的第一个示例中就是这样做的。

下面是例子，These are only initial values that are used during the development of gravitational stresses within the body. In effect, we are forcing the body to behave elastically during the development of the initial in-situ stress state.* This prevents any plastic yield during the initial loading phase of the analysis.Gen zone brick size 6 8 8Mode mohrProp bulk 1e8 shear 0.3e8 fric 35Prop cohesion 1e10 tens 1e10 ;注意在此这个值给的很大。

Init dens 1000Set gravity 0 0 -10Fix x range x -0.1 0.1Fix x range x 5.9 6.1Fix y range y -0.1 0.1Fix y range y 7.9 8.1Fix z range z -0.1 0.1set mech force=50solve;---------------------- mode null ---------------------Prop coh 1e3 tens 1e3 ;改为正常值(在此例中我们故意给小值) Mode null range x 2 ,4 y 2 , 6 z 5, 10Set largeIni xdis 0 ydis 0 zdis 0 ;清零，不影响结果，为画图方便。

FLAC3D5.0_InitialStress(课堂PPT)

P=ρ水gh
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10
水下构筑物
• szz
• pp
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11
深埋工程地应力场
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12
深埋工程地应力场—SB法
• new
• gen zone brick p0 0 0 0 p1 60 0 0 p2 0 60 0 p3 0 0 90 &0 p7 60 60 150 &
FLAC3D 5.0培训教程（武汉）
工程师李振
2014.3.27-3.28 Itasca(武汉)咨询有限公司
.
1
FLAC3D 5.0培训日程安排
2014.3.27~ 2014.3.28
1. FLAC3D V5.0界面操作
2. FLAC3D基本操作方法vs应用流程； initial stress
3. FLAC3D内置Fish语言的应用；
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4
2、更改强度参数的弹塑性求解
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5
2、更改强度参数的弹塑性求解
• 更改强度参数
• 不更改强度参数
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6
2、不更改强度参数的弹塑性求解
（但，采用initial σij ）
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7
3、分阶段弹塑性求解 (mohr—solve elas)
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8
4、存在静水压力的初始应力
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9
Zone上的pp
水位线z=1m
• p4 60 60 0 p5 0 60 90 p6 60 0 150 p7 60 60 150 &
• size 6 6 10
• model elas
• pro bulk 10e10 she 10e10
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16
• ini den 2500

(完整版)FLAC3D5.00培训教程

将FLAC3D文件打包和解包！！
1.1.4 the status bar
状态栏
面板控制的快捷键
每个面板都对应着与面板操作相关的快捷按钮！
快捷键
重新加载上一条或下一条命令！！！
可以单独保存list文件！！！
项目管理 Project .f3prj格式
➢ 将 datafile、plot、savefile 统一起来，构成整个项目。
鼠标放在模型上就会显示相关信息。
缩小
放大恢复
Extrusion Pane
An extruded mesh generated using the extrusion capability in FLAC3D
The Extrusion pane is used to create one or more extrusion sets. It is accessed (if not already visible) by selecting it from the Panes menu. An extrusion set is a 2D shape (drawn) that is linearly extended (extruded) to a third dimension. Once it has been defined in this way, an extrusion set may be used to generate a 3D mesh for use in FLAC3D. Though there is only ever one instance of the Extrusion pane in FLAC3D, multiple extrusion sets may be loaded into it at the same time. The pane provides two distinct views of the extrusion set: the construction view, where the 2D shape is drawn, and the extrusion view, where the extent of the extrusion is specified. These are introduced in the topic Views.

03_FLAC3D5.0_fish应用

FISH变量、函数和操作
如何定义FISH函数
DEF <name> ... END
条件语句
CASE_OF expr · · · CASE n · · · END_CASE IF expr 1 test expr 2 · · · ELSE · · · END_IF
循环语句
LOOP var (expr1, expr2) · · · END_LOOP LOOP WHILE expr1 test expr 2 · · · END_LOOP
FISH的编写习惯
第一步 def abc end abc 第二步 def abc p_gp = gp_head loop while p_gp # null p_gp = gp_next(p_gp) endloop end abc 第三步 def abc p_gp = gp_head loop while p_gp # null command endcommand p_gp = gp_next(p_gp) endloop end abc 第四步 def abc p_gp = gp_head loop while p_gp # null command app nstress … endcommand p_gp = gp_next(p_gp) endloop end abc
WHILE_STEPPING
INT FLOAT STRING ARRAY var(n1, n2) (definition of an array) (change the type of the associated variable)
FISH内置数学函数
Mathematical functions atan atan2 cos exp tan ln log sin sqrt abs max min sgn Type conversion float int string type Tables xtable Message functions in out

(新)Flac3D5.0笔记

FLAC3D5。

0导入dat、txt文件的方法FLAC3D5。

0导入。

sav文件的方法
输入命令流:Restore 文件名.sav
FLAC3D5。

0导入.f3prj文件的方法
视图窗口关闭后,如何再次呈现？输入命令plot zone
当命令流输错可从这里撤销
点亮相应命令流后才可撤销
透明度的调整
保存项目文件
保存文件的重命名做切片
倾向和倾角
法向和过一个点
删除切片
Ctrl+R为查看模型后还原
显示接触面，双击I nterface显示接触面
接触面属性项被激活后，可以更改属性
隐藏网格显示
输出网格
如果点击了透明，将不显示Information
只要不点击透明，则显示Information
等同于
点击显示节点坐标
fish简介
＠之前要有（空格）之前加＠是Flac3D3。

0和5。

0区别
而在之间没有(空格)
按下列步骤取消fish语言前要加＠
点击fish
软件的刷新
如何显示软件最终的安全系数
显示软件节点。

查看应力及最大剪应力的步骤
查看位移云图的步骤
输出云图
设置出图边宽
设置分辨率可设为1080 Reflect镜像restore调用之前的计算结果
Origin原点normal法向量（该点与原点的坐标差）
对于结构单元如桩，若点击Zone将不出现任何模型
按如下步骤才可显示
使用该命令后保存的文件与说建模的文件保存在同一文件夹查看约束反力的步骤
查看分组的步骤
位移云图的显示颜色相反如何调整
连接两个不同尺寸的单元。

-_FLAC3D5.0_InitialStress

• size 6 6 10
• •
mproodeblulelkas10e10常sh规e 法10e10
• ini den 2500
• ini sxx -1e9 grad 0 0 1.1111111e7 range x -.1 .1
• ini sxx -1e9 grad 0 0 6.6666666e6 range x 59.9 60.1
FLAC3D 5.0培训教程（武汉）
工程师李振 2014.3.27-3.28 Itasca(武汉)安排
2014.3.27~ 2014.3.28
1. FLAC3D V5.0界面操作 2. FLAC3D基本操作方法vs应用流程；
initial stress 3. FLAC3D内置Fish语言的应用； 4. FLAC3D结构单元vs接触单元； 5. FLAC3D渗流模块 6. 其他
精品课件
几种形成初始应力的方法
1. 弹性求解的方法 2. 更改强度参数的弹塑性求解 3. 分阶段弹塑性求解(mohr—solve elas) 4. 存在静水压力的初始应力（水下构筑物） 5. 深埋地应力场
精品课件
1、弹性求解的方法
精品课件
2、更改强度参数的弹塑性求解
精品课件
2、更改强度参数的弹塑性求解
• ini syy -1e9 grad 0 0 8.3333333e6 range y -.1 .1
• ini syy -1e9 grad 0 0 8.3333333e6 range y 59.9 60.1精品课件
精品课件
深埋工程地应力场
精品课件
• size 6 6 10
• model elas
• pro深bu埋lk工10程e10地sh应e 力10e场10 —SB法

FLAC3D5.0模型及输入参数说明教学文案

FL AC3 D5. 0 模型及输入参数说明模型参数代码可参考ma nua I中各个章节的comma nd命令及说明，注意单位。

用prop赋值。

各向同性弹性模型模型修正剑桥模型经典粘弹性模型1.1.14二分幕律模型5 mviscosity Maxwell 动力粘度，朮碎盐变形模型1.2模型适用说明遍布节理模型适用于Mohr-Coulomb材料来明确显示力在各个方向上的差异性。

双线性软化应变遍布节理模型综合了软化应变Mohr-Coulomb模型和遍布节理模型，这种模型包含面向矩阵和遍布节理的一个双线性断裂点集。

改进的Cam-clay 模型反映了形变度和抗破坏能力对体积变化的影响。

Mohr-Coulomb模型最适用于一般工程研究，同时，Mohr-Coulomb的内聚力和摩擦角参数相对于地质工程材料的其它属性，更容易获得。

软化应变和遍布节理塑性模型实际上是Mohr-Coulomb模型的变形，这些模型如果在附加材料参数的值较高时将得出与Mohr-Coulomb模型同样的结果。

Druck-Prager模型是一个相对于Mohr-Coulomb 模型的破坏标准的简化体，但是它一般不适于用来描述地质工程材料的破坏情况。

它主要是用来把FLAC3D与其它一些有Druck-Prager模型但却没有Mohr-Coulomb模型的数学软件作比较。

在摩擦力为零的时候请注意，此时Mohr-Coulomb模型退化为Tresca模型，而Druck-Prager 模型退化为Von Mises模型。

Druck-Prager模型和Mohr-Coulomb模型是计算起来效率最高的塑性模型，而其它的塑性模型在计算时却需要更多的内存和额外的时间。

例如，塑性应变不能在Mohr-Coulomb模型中直接计算出来（参见附录G）。

如果需要计算塑性应变，则必需要用应变软化模型。

这种模型主要是用于破坏后的情况对工程影响重大的工程活动中，如弯曲柱、开采塌落或回填研究。

(2024年)FLAC3D5.0培训教程

提供多种网格划分方法，如映射网格、自由网格等，以满足不同
精度和计算效率的需求。
2024/3/26
13
接触面处理及摩擦模拟
2024/3/26
接触面定义
01
支持定义不同材料之间的接触面，包括摩擦系数、刚度等参数
设置。
接触面行为模拟
02
能够模拟接触面的滑动、张开和闭合等行为，以及接触面间的
传热和传质过程。
动画展示技巧在制作动画时，可采用一些技巧来提高动画的展示效果，如使用透明度渐变来突出关键区域的变化、使用色彩对比来区分不同物理量的分布情况等。
结果数据对比在动画制作中，可将不同方案或不同时间步的计算结果进行对比展示，以便更直观地评估不同方案的效果或观察模型的动态响应过程。
25
06
总结与展望
21
05
数据可视化与后处理
2024/3/26
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结果数据输出格式
文本文件输出
可将模型计算结果以文本文件形式输出，方便用户进行自定义处理和分析。
Excel文件输出
可将模型计算结果直接导出到Excel文件中，便于用户进行数据整理、分析和可视化。
图像文件输出
可将模型计算结果以图像形式输出，如等值线图、云图等，方便用户进行直观分析和展示。
施方法
学习在FLAC3D中施加边界条件和荷载的方法，确保模拟过程的真实性。
11
03
高级功能与技巧
2024/3/26
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复杂模型处理技术
复杂地形建模
利用地形数据生成三维地形模型，包括不规则地形、断层、节理等。
复杂结构建模
支持多种结构单元，如梁、板、壳等，实现复杂结构的精细化建

Flac 3D 5.0教程

第二章完成第一个简单分析计算样例by typing the commands from the keyboard, pressing<Enter>at the end of each command line, and seeing the results directly.newgen zone brick size 6 8 8（This command will create an initial mesh that is six zones in the x-direction, eight zones in the y-direction and eight zones in the z-direction. For our model, the z-axis is oriented in the verticaldirection.）Plot（the Plot Base/0>prompt will appear. As long as this prompt appears, any subsequentcommands will be associated with the PLOT command. The plot view is identified as Base/0,which is the default view.）create Trenchadd surface yellowadd axes blackshowNow, give the zones a material model and properties. For this example, we use the Mohr-Coulombelastic-plastic model. Go back to the Flac3D>prompt in the command window andtype in thefollowing command:modelmohrThis will specify the Mohr-Coulomb model. Every zone in the grid could conceivably have adifferent material model and property. However, by not specifying a range of zonesafter the MODEL command, FLAC3D assumes that all zones are to be Mohr-Coulomb material.prop bulk = 1e8 shear = 0.3e8 fric = 35propcoh = 1e10 tens = 1e10You see that very high cohesion and tensile strength values are given. These areonlyinitial values that are used during the development of gravitational stresses within the body.In effect, we are forcing the body to behave elastically during the development of theinitial insitustress state.* This prevents any plastic yield during the initial loading phase of theanalysis.For this problem, loading is due to gravity. To apply gravity, use the commands setgrav 0, 0, -9.81ini dens = 1000In order to develop a gravitational body force, themass density must also be initialized. The INI command is used to initialize the mass density to1000 kg/m3 for all zones in the model.Next, the boundary conditions for the problem are set. At the Flac3D>prompt, type fix x range x -0.1 0.1fix x range x 5.9 6.1fix y range y -0.1 0.1fix y range y 7.9 8.1fix z range z -0.1 0.1With these commands, roller boundaries are placed on five sides of the model. The boundaries are “fixed” only in the specified direction (i.e., no displacement or velocity is allowed). The FIX commands perform the following functions.1. The gridpoints along the boundary planes at x = 0 and x = 6 are fixed in the x-direction. These two planes fall within the coordinate ranges specified by the range keywords for the first two FIX commands.2. The gridpoints along the boundary planes at y = 0 and y = 8 are fixed in the y-direction. These planes fall within the ranges specified for the third and fourth FIX commands.3. The gridpoints along the bottom boundary (z = 0) are fixed in the z-direction. This plane falls within the range for the fifth FIX command.We wish to monitor the change in the values of selected variables in the model during the calculational stepping. A HISTORY command can assist in helping us determinewhether a stable equilibrium solution or unstable collapse is occurring. We type the following commands:hist n = 5histunbalhistgpzdisp 4,4,8We choose to monitor the change in variables every five calculation steps. It is always a good idea to monitor the maximum unbalanced force in a model. If the unbalanced force approaches a very small value and displacement histories become constant, this indicates that an equilibrium state is reached.To allow gravitational stresses to develop within the body, we timestep the simulation to equilibrium.Here the SOLVE command is used to detect equilibrium automatically.setmech force=50solveWhen the unbalanced force falls below the limiting value (a limiting force of 50 N is specified with the SET command), the run will stop.* The plots are updated, since they are still visible on the screen. Shutting down the plots will cause the model to cycle faster.plothist 1hist 2The unbalanced force history approaches zero, andthe displacement history becomes constant; both are indicators that an equilibriumstate has beenreached.Note that each history is numbered sequentially from 1 as it is entered via the HIST command. Return to the Flac3D> prompt and typeprinthistfor a listing of the histories and their corresponding numbers.Plotcreat trenchadd contour dispadd axes blackshowclearaddbcontourszzadd axesplot create GravVplot set plane dip=90 dd=0 origin=3,4,0plot set rot 15 0 20plot set center 2.5 4.2 4.0plot add bound behindplot add bcontszz planeplot add axesplot showThis sequence will create a view, which we have called GravV, and make it the current view. We then set a plane for that view oriented at a dip angle of 90◦ (from the xy-plane, assuming that negative-z is “down”), a dip direction of 0◦(measured clockwise from the positive y-axis in the xy-plane) and with one point on the plane at (x = 3, y = 4, z = 0). We add a wire-frame boundary plotted behind the plane and a block contour plot of the vertical stress component, σzz, on the plane. Finally, the model axes are added. The block contour plot, as opposed to an interpolated contour plot, displays the value of the stress calculated at each zone centroid. The color of each zone corresponds directly to the zone-based stress.It is wise to save the initial state so that you can restore it at any time to perform parameter studies.savetrench.savWe can change the current view from GravV to Trench with the commandplot current TrenchNow we can excavate a trench in the soil. First, typepropcoh=1e3 tens=1e3This will set the cohesion and tensile strength for all zones to 1000 Pa. These valuesfor strength arehigh enough to prevent failure in our initial state (i.e., unexcavated), but you shouldalways checkfor possible failure in the initial state by performing a few calculation steps. Toexcavate the trench,entermodel null range x=2,4 y=2,6 z=5,10With a low cohesion and vertical unsupported trench walls, collapse should occur. Because wewant to examine this process realistically, the large-strain logic is specified. This isdone by typingset largeFor plotting purposes, we wish to see only the change in displacements from the trench excavation, and not from the previous gravitational loading, so we zero out the x-, y- and z-displacement components:inixdis=0 ydis=0 zdis=0We purposely set the cohesion low enough to result in failure, so we do not want to use the SOLVE command with a limit for out-of-balance force (which checks for equilibrium). Oursimulation willnever converge to the equilibrium state. Instead, we can step through the simulationprocess onetimestep at a time, and plot and print the results of the collapse as it occurs. This is thereal powerof the explicit method. The model is not required to converge to equilibrium at eachcalculationcycle because we never have to solve a set of linear algebraic equationssimultaneously, as is thecase for implicit codes, with which many engineers are familiar.we use the STEP command: step 2000第三章FLAC 3D基础知识gridpointzonehorizontal boundary stressstructural cables(tiebacks)model boundaryinternal boundaries(excavation)roller bottom boundaryNamed ObjectsMacro Object—Typically, such an object contains a long, complex string that may be used repeatedly in the model. The pre-processor compares a string of command tokens to the list of defined macros and replaces any matching macro object with its fully expanded contents.macro Pt0 ’p0 0 0 0’macro Pt1 ’p1 add 10 0 0’macro Pt2 ’p2 add 0 10 0’macro Pt3 ’p3 add 0 0 10’macroModel_Size ’size 4 5 6’macroBig_Brick ’zone brick Pt0 Pt1 Pt2 Pt3 Model_Size’.genBig_Brick.macro ’Pt0’ ’p0 15 15 15’genBig_BrickThis pre-processing has two effects:(1) macro objects may be nested (but not recursively); and(2) the macro object name is removed from the command string.Model Object—Model objects, such as ranges in space, groups of zones in a model, or plot views, can be given userdefined names. Those objects can then be referred to by their names.gen zone brick size 6 6 6group Tunnel range x 1 5 y 0 6 z 1 5modelmohr..modelnul range group Tunnel.The named range and the named group are two very different model objects. The range pertains toa specified volume of space (or range of values), whereas the group identifies acollection of finitedifference zones in the model.Sign ConventionsDIRECT STRESS —Positive stresses indicate tension; negative stresses indicate compression.第四章初级实体建模技术Grid generation is performed via the GENERATE command and associated keywords that both define the number of zones in a model and shape the grid to fit a specified problem region.The number of zones is specified by the size keyword.It is best to start with a grid that has few zones (say, 1000 to 1500) to perform simple test runs andmake refinements to the grid. Then, increase the number of zones to improve theaccuracy.Using actual coordinatesgen zone brick size 6,8,8 p0 -10, -10, -20 &p1 10, -10, -20 &p2 -10, 10, -20 &p3 -10, -10, 0plot surfOnly four corners are required to define a parallelepiped-shaped mesh. More corners can be specifiedto define an irregular surface. Example 2.14 shows how to make a sloping surface atthe top of themesh.gen zone brick size 6,8,8 p0 -10, -10, -20 &p1 10, -10, -20 p2 -10, 10, -20 &p3 -10, -10, 0 p4 10, 10, -20 &p5 -10, 10, 10 p6 10, -10, 0 &p7 10, 10, 10plot surfIn the tutorial example, we noted that the boundaries of the model were influencing the results (see Figure 2.6). The boundary must be placed far enough away from the excavation to reduce these effects. A gradually graded mesh can be created in FLAC3D to move the model boundaries farther out without significantly increasingthe number of zones. For example, the command GEN zone radbrick creates a radially graded mesh around a brick-shaped mesh. The command in Example 2.15 creates a 3 ×5 ×5 zone brick-shaped mesh surrounded by a 7-zone radially graded mesh.gen zone radbrick&p0 (0,0,0) p1 (10,0,0) p2 (0,10,0) p3 (0,0,10) &size 3,5,5,7 &ratio 1,1,1,1.5 &dim 1 4 2 fillplot surfThe x,y,z coordinate system in FLAC3D is always right-handed and, as a default, the z-axis is drawn in the vertical direction on the screen. In Example 2.14 we assumed the z-axis was pointing in the vertical direction. However, we do not have to interpret the z-axis to mean the up direction. For Example 2.15, we will assume that the y-axis is the vertical direction. As long as we define the model in a right-handed system, we can create the grid in any direction we desire.The size keyword, as used in Example 2.15, specifies the number of zones in the brick and the number radially surrounding the brick (see Figure 2.11). The keyword ratio is given to manipulate the grid spacing. The four values that follow ratio are geometric ratios between successive zone sizes. The first three values are ratios for the zones in the brick, and the fourth value is the ratio for the zones surrounding the brick. In Example 2.15 above, the ratio is 1.0 for the brick zones and1.5 for the zones surrounding the brick. This causes each successive ring of zones surrounding the brick to be 1.5 times larger in the radial direction. The dim keyword defines the dimensions of the brick region (i.e., 1 m ×4 m ×2 m). The fill keyword fills the brick region with zones. If fill is omitted, no zones will be generated within the brick region.Notice that size, ratio and dim all refer to local axes as defined by p0, p1, p2, p3 in Figure 2.11, not to the global x,y,z-axes.Creating a model by reflecting elements on planes of symmetrygen zone radbrick&p0 (0,0,0) p1 (10,0,0) p2 (0,10,0) p3 (0,0,10) &size 3,5,5,7 &ratio 1,1,1,1.5 &dim 1 4 2 fillgen zone reflect dip 0 dd 90gen zone reflect dip 90 dd 90plot surfdip 为倾角的意思，其值大小为面与xy面所夹的倾角，dd为倾向，其值大小为面的法线在xy平面上的投影与y轴的夹角。

flac3d5.0结构单元教程

; ========================================================
; Bring the problem to equilibrium solve ratio=1e-7
如何设置结构单元的跟踪变量！
save equal-concent-loads
; ========================================================
history add id=10 sel node ydisp id=7
history add id=30 sel beamsel moment mz end2 cid=1 ; moment, right of SEL-1
history add id=31 sel beamsel moment mz end1 cid=2 ; moment, left of SEL-2
end @set_vals generate zone cylinder p0=( 0.0, 0.0, 0.0 ) &
p1=( @ptA, 0.0, @ptB ) & p2=( 0.0, 25.0, 0.0 ) & p3=( 0.0, 0.0, 25.0 ) & p4=( @ptA, 25.0, @ptB ) & p5=( 0.0, 25.0, 25.0 ) & size=(1, 2, 2) sel shell id=5 range cylinder end1=(0.0, 0.0,0.0) &
end2=(0.0,25.0,0.0) radius=24.5 not plot add zg plot ad sel geom delete zones ; delete all zones sel node init zpos add -25.0

02-4_FLAC3D5.0_Fish调整网格简析

这是一个小的数学问题：对与任意的直线段l,假设将其分成n份，相邻线段的比例为rat（沿直线段方向），那么求出前i段直线段的长度l0li
l1 l2 l3 li ln
求出前第一段的长度，然后应用等比数列前i项的求和公式即可得到上面代码中的运算式。
利用fish调整规整网格建立交叉隧道
一、建模思路二、建模过程fish语句的分析三、小结
一、建模思路
• 1 首先用内置brick生成砖型规整网格 • 2 在现有网格的基础上调整gridpoint的坐标，坐标的调整依据建模人员期望的网格形状来进行 • 3 规划好网格的调整次序（如先调整端面网格，再调整中间部分的网格）
•
• • •
z0
z1
z2
z3 z4
z5
Gridpoint遍历的次序，循环从内到外
x0y0z0
x0y0z1 x0y0z2 x0y0z3 x0y0z4 x0y0z5 x1y0z0 x1y0z1 x1y0z2
x0y1z0
x0y1z1 x0y1z2 x0y1z3 x0y1z4 x0y1z5 x1y1z0 x1y1z1 x1y1z2
手册中对内存函数用法的解释
• • • • •
lose_mem(n,ad) This function returns n FISH -variable objects to the host. The parameter ad is the address of the start of the array of objects; there is no checking done to verify that ad is a valid address. The returned value is undefined. get_mem(n)This function gets n FISH -variable objects from the host's memory space and returns the address of the start of the contiguous array of objects mem(ad) This function may be used either as a source or destination (i.e., on the right- or left-hand side of an expression): var = mem(ad) The value of the FISH -variable at address ad is transmitted to the regular FISH variable var (together with the type). mem(ad)=var The value and type of the regular FISH variable var is placed in the FISH variable at address ad. It is the user's responsibility to check that the addresses given contain valid FISH variables. During execution, an error message is given if ad is not of type pointer.

FLAC3D5.00培训

指针型：表示单元和节点的存储地址
2. Fish 函数
Fish 函数语句
选择语句 CASEOF 表达式 …默认语句 CASE n1 …表达式值为n1时的语句 CASE n2 …表达式值为n2时的语句 ENDCASE 循环语句 LOOP var (exp1, exp2) … ENDLOOP 或 LOOP WHILE 条件表达式 … ENDLOOP 命令语句 COMMAND … ENDCOMMAND
1. FLAC3D基本操作方法
数值计算一般流程
建立模型
通过外部导入或在FLAC3D中直
材料参数边界条件及初始条件
接建模的方式建立计算模型。
建立模型
材料参数
材料本构材料力学参数
边界条件及初始条件
速1. FLAC3D基本操作方法
建立模型在FLAC3D中，模型的建立通过关键词generate来实现，其基本格式为：
1. FLAC3D基本操作方法
建立模型
FLAC3D建模的基本思路为“堆积木”，即首先建立各种形状的
网格单元，最后将建立的网格单元组合在一起，生成可用于数值计算
的整体模型。 FLAC3D内置13种不同形状的网格，包括brick(砖形), cshell(圆柱状壳网格), cylinder(圆柱状网格), cylint(圆柱状交叉网格), dbrick(退化砖形网格), pyramid(锥形网格), radbrick(砖形辐射网格), radcylinder(圆柱状辐射网格), radtunnel(平行六边形状辐射网格), retrahedron(辐射网格), tunint(砖形交叉网格), uwedge(均匀楔形网格), wedge(楔形网格).
通过对称生成网格

FLAC-FLAC3D基础与应用(结构单元)PPT课件

结构单元
1
FLAC3D中的结构单元
• 有限单元 • 梁(beam)单元
beam
cable
• 锚索(cable)单元
• 桩(pile)单元
○ 锚杆: rockbolt
• 壳(shell)单元
shell geogrid
• 格栅(geogrid)单元
○ 土工织物；土工格栅
pile
liner
2
结构单元的应用
• Link可以与任何位置的
grid进行联系，而不一定
要与grid的坐标一致。群桩 = 插秧
7
默认的连接属性
建模SEL结构模型时，程序自动建立结构 node与zone的连接 (node-zone links)
8
Node-Node Links
• SEL nodes 之间不会自动生成联系. • 必须手动设置node之间的联系 (e.g., beam and cable) 这
13
隧道与土体的相互作用
• 半圆隧道直径3.25m
• 上覆土层厚度5m
ht • 计算范围3r
r
• 土体弹性计算
○ (K=30MPa, G=10MPa)
hb
• 参数化编程
○ 几何尺寸
B
○ 模型参数
○ 网格形状
14
计算步骤
模型网格计算结果
初始应力生成施加管片
15
管片的连接
• 冷连接
○ 弯矩和剪力不能直接在环与环间传递，只能通过其相邻的介质传递
• 土与结构的相互作用
○ 桩基；基坑；边坡锚固 ○ 地下硐室的支撑结构；采矿；盾构 ○ 土工织物；土工合成材料
• 结构不宜复杂
○ 岩土工程软件，不宜单纯的结构分析

04_FLAC3D5.0_结构单元和接触面

3、结构单元的参数取值
某些结构单元参数的取值要视具体情况而定，根据经验且必要时调整参数通过试算来确定。
4、结构单元实例分析
• 4.1、简支梁（beam单元）承受两个相等集中载荷
• 4.2、简支梁（shell单元）承受两个相等集中载荷
4.1、简支梁（beam单元）承受两个相等集中载荷
Simple Beam – Two Equal Concentrated Loads
2、结构单元的建模方法—线型结构单元
先建立节点再联接成单元的方法；
2、结构单元的建模方法—壳型结构单元
壳单元
2、结构单元的建模方法—壳型结构单元
def set_vals global ptA = 25.0 * sin( 40.0*degrad ) ; global ptB = 25.0 * cos( 40.0*degrad ) end @set_vals generate zone cylinder p0=( 0.0, 0.0, 0.0 ) & p1=( @ptA, 0.0, @ptB ) & p2=( 0.0, 25.0, 0.0 ) & p3=( 0.0, 0.0, 25.0 ) & p4=( @ptA, 25.0, @ptB ) & p5=( 0.0, 25.0, 25.0 ) & size=(1, 2, 2) sel shell id=5 range cylinder end1=(0.0, 0.0,0.0) & end2=(0.0,25.0,0.0) radius=24.5 not plot add zg plot ad sel geom delete zones ; delete all zones sel node init zpos add -25.0

Flac3D5.0操作方法笔记

FLAC3D5.0导入dat、txt文件的方法
FLAC3D5.0导入.sav文件的方法
输入命令流：Restore 文件名.sav
FLAC3D5.0导入.f3prj文件的方法
视图窗口关闭后，如何再次呈现？输入命令plot zone
当命令流输错可从这里撤销
点亮相应命令流后才可撤销
透明度的调整
保存项目文件
保存文件的重命名
做切片
倾向和倾角
法向和过一个点
删除切片
Ctrl+R为查看模型后还原
显示接触面，双击I nterface显示接触面
接触面属性项被激活后，可以更改属性
隐藏网格显示
输出网格
如果点击了透明，将不显示Information
只要不点击透明，则显示Information
等同于
点击显示节点坐标
fish简介
@之前要有（空格）之前加@是Flac3D3.0和5.0区别
而在之间没有（空格）
按下列步骤取消fish语言前要加@
点击fish
软件的刷新
如何显示软件最终的安全系数
显示软件节点.
查看应力及最大剪应力的步骤
查看位移云图的步骤
输出云图
设置出图边宽
设置分辨率可设为1080 Reflect镜像restore调用之前的计算结果
Origin原点normal法向量（该点与原点的坐标差）
对于结构单元如桩，若点击Zone将不出现任何模型
按如下步骤才可显示
使用该命令后保存的文件与说建模的文件保存在同一文件夹
查看约束反力的步骤
查看分组的步骤
位移云图的显示颜色相反如何调整
连接两个不同尺寸的单元。

flac3d5.0结构单元教程

flac结构单元用法

FLAC3D5.0_InitialStress(课堂PPT)

(完整版)FLAC3D5.00培训教程

03_FLAC3D5.0_fish应用

(新)Flac3D5.0笔记

-_FLAC3D5.0_InitialStress

FLAC3D5.0模型及输入参数说明教学文案

(2024年)FLAC3D5.0培训教程

Flac 3D 5.0教程

flac3d5.0结构单元教程

02-4_FLAC3D5.0_Fish调整网格简析

FLAC3D5.00培训

FLAC-FLAC3D基础与应用(结构单元)PPT课件

最新FLAC3D5.00培训教程教学讲义ppt课件

04_FLAC3D5.0_结构单元和接触面

Flac3D5.0操作方法笔记