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登錄SECTION的案例
*SECTION_SOLID 中的ALE 算法
*SECTION_SOLID 為三維結(jié)構(gòu)和流體單元定義單元Lagrangian/ALE/Euler算法,通過 ELFORM選項來實現(xiàn)。【之前的關(guān)鍵字是*SECTION_SOLID_ALE,高版本直接合并到 *SECTION_SOLID中】
ALE 算法適合用于解決大變形問題,在 SECTION_SOLID 關(guān)鍵字中定義 ELFORM 為 5、6、7、11、12 均可啟動 ALE 算法,他們之間的不同之處在于:
ELFORM = 5:是單點積分當(dāng)物質(zhì) ALE 算法,適用于具有規(guī)則幾何形狀的模型,且變形不能過大
ELFORM = 6 或 7:僅適用于單流體
ELFORM = 11:最為常用
ELFORM = 11 或 12:都可以用于流固耦合分析,但是ELFORM= 5、6、7都不能用于流固耦合分析
ELFORM = 5、6、7 和 12:基本棄之不用
展開 section的使用和一些問題
在制作一個模型的時候要用到同種材料不同厚度的兩種板,但是14.5里不能用時常數(shù)了,看到section有點困惑。請問section里的layer是什么?是在原來的板上再覆蓋一層嗎?那么是不是要通過兩個section對這兩種版的厚度進行定義?
還有就是我在這個模型上面加載了一個壓力,uniform temp是100,但是求解后發(fā)現(xiàn)只有熱應(yīng)變了,壓力沒作用上去,這是為什么?
T-Section隧道模型(CylinderTSectionWithWall)---應(yīng)力松弛法計算
FLAC3D內(nèi)置的"Building Blocks"模型也能模擬襯砌,這些模型本質(zhì)上是把一系列命令封裝在一起,其中一種在公路隧道廣泛應(yīng)用的模型是T-Section。這個筆記回顧了T-Section模型的使用。
2 模型
T-Section(CylinderTSectionWithWall)模型的建立在《FLAC3D與Python的集成 (3)---網(wǎng)格劃分Building Blocks》中有完整詳細的操作過程,包括使用Python運行完整模型的過程,在此不再贅述。
這個模型的材料包括三部分:Rock, Space, Wall, 其中Rock代表原巖材料,Wall可以代表襯砌或另一種材料(在輸入block時可以改變尺寸),Space代表開挖區(qū)域。
相對應(yīng)的代碼如下:
building-blocks set create "mwu"building-blocks block import from-file "CylinderTSectionWithWall.bset"zone generate from-building-blockszone face skin
3 計算
計算過程如前文所述,首先在自重應(yīng)力下進行平衡計算:
zone initialize-stress
然后使用下面的命令進行開挖計算,
zone relax excavate range group "Space"
這個命令可逐漸減小開挖范圍內(nèi)單元的應(yīng)力,剛度和密度,直到它們對模型產(chǎn)生影響。"
展開 section ID set 1 undefined but referenced by element ...
對儲罐(空罐)進行模態(tài)分析,殼用shell63 ,拱頂鋼骨用beam188單元,在分析時出現(xiàn)以下提示:section ID set 1 undefined but referenced by element ...,然后計算中止,請問這是什么意思?望賜教,非常感謝?

LMS TestLab 如何將不同通道數(shù)據(jù)在同一個Section下重新排序到一個項目文件里面-lon
這個方法適用于LMS Testlab2018以上版本,低于2018版本的首先需要再Add in插件里面,插入Excel Data Driver,然后操作和文檔上步驟相同
LMS 保存數(shù)據(jù)到Excel.jpg
LMS TestLab 如何將不同通道數(shù)據(jù)在同一個Section下重新排序到一個項目文件里面-long.pdf
目的:通過一系列操作,可以使不同通道名字的采集數(shù)據(jù)按照順序排序在新建立的Folder里面。
滾動視差?CSS 不在話下
我們使用,圖文混合排布的方式,實現(xiàn)滾動視差,HTML 結(jié)構(gòu)如下,.g-word 表示內(nèi)容結(jié)構(gòu),.g-img 表示背景圖片結(jié)構(gòu):
<section class="g-word">Header</section> <section class="g-img">IMG1</section> <section class="g-word">Content1</section> <section class="g-img">IMG2</section> <section class="g-word">Content2</section> <section class="g-img">IMG3</section> <section class="g-word">Footer</section> 復(fù)制代碼
關(guān)鍵 CSS:
section { height: 100vh; } .g-img { background-image: url(...); background-attachment: fixed; background-size: cover; background-position: center center; } 復(fù)制代碼
效果如下:
<img src="data:image/svg+xml;utf8,
"/>
CodePen Demo -- https://codepen.io/Chokcoco/pen/JBaQoY
嗯?有點神奇,為什么會是這樣呢?可能很多人會和我一樣,第一次接觸這個屬性對這樣的效果感到懵逼。
展開 基于應(yīng)變監(jiān)測數(shù)據(jù)的大跨度連續(xù)剛構(gòu)橋的可靠性評估(二)( in English)
The cross section of box girder is a single-box and single-chamber. The heights, thickness of base plate and thickness of web plate vary from 8 m to 2.8 m, 1 m to 0.32 m and 0.9 m to 0.45 m respectively in cross sections from the supporting base to the mid-span.
The cross sections with the measuring points of the health monitoring system in girder locate near piers, in mid-span and in 1/4 span, and there are total 20 sections. The embedded locations of strain variety sensor (The sensor is show in Fig. 2) in each section are illustrated in Fig. 3 with given numbers.
展開 Tcl/Tk開發(fā)HyperWork目錄樹結(jié)構(gòu)
圖1
點擊1-1section后,彈出如下所示的面板:
圖2
同樣的,點擊1-2section彈出的面板如下:
圖3
點擊1-3section彈出的面板如下:
圖4
剛性彈丸對板材的侵徹分析(ABAQUS 6.16幫助文檔第2.1.3節(jié))
pl3d_erode_gcont.inp
Model using the default section controls and the general contact capability.
pl3d_erode_ale.inp
Model using the default section controls and the *ADAPTIVE MESH option.
pl3d_erode_ocs.inp
Model using the ORTHOGONAL kinematic and COMBINED hourglass section control options.
pl3d_erode_ocs_gcont.inp
Model using the ORTHOGONAL kinematic and COMBINED hourglass section control options and the general contact capability.
pl3d_erode_oes.inp
Model using the ORTHOGONAL kinematic and ENHANCED hourglass section control options.
pl3d_erode_oes_gcont.inp
Model using the ORTHOGONAL kinematic and ENHANCED hourglass section control options and the general contact capability.
pl3d_erode_anl.inp
Model using an analytical rigid surface and the default section controls.
展開 滲流應(yīng)力耦合分析(幫助文檔節(jié)選)
All of the output variable identifiers are outlined in “Abaqus/Standard output variable identifiers,” Section 4.2.1.
Formula 1 Wing Composite Lay-up Opt
An optimisation has been performed on the lower rear wing section of a formula one car to demonstrate the capabilities of this process.
Design Objective
Minimise the mass of the lower wing section
Loading
500N force in forward direction applied to upper wing section.
Lower wing section constrained at attachment to rear crush cone.
Constraints
Maximum displacement of upper wing section of 1.5mm.
Composite failure index of all parts must not exceed 1.
展開 
Formula 1 Wing Composite Lay-up Opt
An optimisation has been performed on the lower rear wing section of a formula one car to demonstrate the capabilities of this process.
Design Objective
Minimise the mass of the lower wing section
Loading
500N force in forward direction applied to upper wing section.Lower wing section constrained at attachment to rear crush cone.
ConstraintsMaximum displacement of upper wing section of 1.5mm.Composite failure index of all parts must not exceed 1.
Design VariablesLower wing section sectioned into 7 designable regionsPly orientations are varied between ?
展開 hypermesh-ansys聯(lián)合仿真-《梁單元1》
HyperBeam view視圖下開始都是空白的,在左側(cè)右擊空白區(qū)域在彈出的快捷菜單選擇創(chuàng)建,選擇ANSYS下預(yù)設(shè)的截面類型,選擇csolid即為圓形實體截面,新建的截面名稱命名為section_csolid。設(shè)置半徑為2,視圖區(qū)顯示截面效果,右側(cè)顯示截面的幾何屬性。
切換回到Model View視圖下,選中property下的section,將Hyper beam section設(shè)置為剛才新建的section_csolid,此時再通過設(shè)置在圖形區(qū)顯示出了梁的3D效果,如下圖的最下面圖標(biāo)。
>>>>>>>>>>
精彩鏈接:
《hypermesh-ansys聯(lián)合仿真-梁單元2》
《hypermesh-ansys聯(lián)合仿真-梁單元3》
《hypermesh-ansys聯(lián)合仿真-梁單元4》
《正確選擇梁單元及如何考慮梁剪切變形》
展開 opensees模擬滯回
-37.5 100 37.5 100layer straight 1 4 12.57 -422.5 85 -62.5 85layer straight 1 4 12.57 -422.5 105 -62.5 105layer straight 1 4 12.57 62.5 85 422.5 85layer straight 1 4 12.57 62.5 105 422.5 105}#零長度單元纖維模型section Fiber 5 {#核心混凝土patch rect 200 3 8 -37.5 -100 37.5 100#cover concrete fiberspatch rect 300 3 1 -37.5 100 37.5 125patch rect 300 1 10 37.5 -125 62.5 125patch rect 300 3 1 -37.5 -125 37.5 -100patch rect 300 1 10 -62.5 -125 -37.5 125#reinforcing fiberslayer straight 100 4 50.27 -37.5 -100 37.5 -100layer straight 100 4 78.54 -37.5 100 37.5 100}#柱子section Aggregator 1001 201 Vy 301 Vz 401 T -section 1#加密區(qū)(1)section Aggregator 1002 202 Vy 302 Vz 402 T -section 2#非加密區(qū)section Aggregator 1003 202 Vy 302 Vz 402 T -section 3#加密區(qū)(2)section Aggregator 1004 202 Vy 302 Vz 402 T -section 4#零長度section
展開 lsdyna的實體單元彎矩和截面力的提取 ¥20
介紹兩種方法:
1)用*DATABASE_CROSS_SECTION_PLANE+*DADABASE_SECFORC 定義,但是必需在求解之前就定義好, 求解完成后在工作路徑下生成SECFORC文本文件可以直接用origin /exel等軟件讀取 也可以在lspp的ASCII中顯示
When the PLANE option is used to define a cross-section (*DATABASE_CROSS_SECTION_PLANE), LS-DYNA chooses the nodes and elements making up the cross-section. The nodes and elements chosen for that cross-section are reported in the D3HSP file under the heading "interface definition".*DADABASE_SECFORC determines the output interval for the cross-section forces and moments. The forces and moments are output in the global coordinate system, or, optionally, in an updated local coordinate system attached to a rigid body or accelerometer.
這種方法足以解決截面輸出的所有問題,但是每次都要在k文件中定義截面和截面輸出,如果覺得太繁瑣,可以試試第二種方法!
展開 SECTION的相關(guān)專題、標(biāo)簽、搜索
SECTIONsection-beamSECTION_SOLID section must not self-sectionpart type is shell, but the section is not *section_shell(_option)assign section的時候找不到創(chuàng)建的sectionmultiply defined section id section 0 at 3th inputmultiply defined section id section 197 at 162th inputmultiply defined section id section 160205 at 2443th input