Analysis of cantilever by fuzhenfeng

XYZ方向位移如下

/CLEAR,START

/COM,ANSYS RELEASE 14.5??? UP20120918?????? 17:02:28??? 12/24/2020

/input,start145,ans,'C:\Program Files\ANSYS Inc\v145\ANSYS\apdl\'??

!*?

/PREP7?

!*?

ET,1,BEAM189

!*?

!*?

!*?

MPTEMP,,,,,,,,?

MPTEMP,1,0?

MPDATA,EX,1,,2e11??

MPDATA,PRXY,1,,0.2?

MPTEMP,,,,,,,,?

MPTEMP,1,0?

MPDATA,DENS,1,,8000

SECTYPE,?? 1, BEAM, RECT, beam, 0??

SECOFFSET, CENT

SECDATA,0.03,0.1,0,0,0,0,0,0,0,0,0,0

K,1,39,,,??

K,2,41,,,??

LSTR,?????? 1,?????? 2?

LMESH,?????? 1?

FLST,2,1,3,ORDE,1??

FITEM,2,1??

!*?

/GO

DK,P51X, , , ,0,ALL, , , , , ,?

FLST,2,1,3,ORDE,1??

FITEM,2,2??

!*?

/GO

FK,P51X,FY,

FLST,2,1,3,ORDE,1??

FITEM,2,2??

!*?

/GO

FK,P51X,FY,-300

FINISH?

/SOL

/STATUS,SOLU

SOLVE??

FINISH?

/POST1?

!*?

/EFACET,1??

PLNSOL, S,X, 0,1.0?

!*?

/EFACET,1??

PLNSOL, S,Y, 0,1.0?

!*?

/EFACET,1??

PLNSOL, S,Y, 0,1.0?

!*?

/EFACET,1??

PLNSOL, U,X, 0,1.0?

!*?

/EFACET,1??

PLNSOL, U,Y, 0,1.0?

!*?

/EFACET,1??

PLNSOL, U,Z, 0,1.0?

!*?

!*?

/EFACET,1??

PLNSOL, U,X, 0,1.0?

!*?

!*?

/EFACET,1??

PLNSOL, U,Y, 0,1.0?

!*?

/EFACET,1??

PLNSOL, U,Z, 0,1.0?

!*?

WPSTYLE,,,,,,,,1

!*?

/EFACET,1??

PLNSOL, U,Y, 0,1.0?

FLST,2,1,8?

FITEM,2,1,1,1??

WPAVE,P51X?

WPSTYLE,,,,,,,,0

!*?

WPSTYL, STAT

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第二題

Transient analysis of working table by fuzhenfeng

/BATCH?

/COM,ANSYS RELEASE 14.5??? UP20120918?????? 16:36:06??? 12/24/2020

/input,menust,tmp,''

/GRA,POWER

/GST,ON

/PLO,INFO,3

/GRO,CURL,ON

/CPLANE,1??

/REPLOT,RESIZE?

WPSTYLE,,,,,,,,0

RESUME?

/COM,ANSYS RELEASE 14.5??? UP20120918?????? 16:36:56??? 12/24/2020

/FILNAME,fuzhenfeng19920201151439,0

/PREP7?

!*?

ET,1,BEAM188

!*?

ET,2,SHELL181??

!*?

!*?

/NOPR??

KEYW,PR_SET,1??

KEYW,PR_STRUC,1

KEYW,PR_THERM,0

KEYW,PR_FLUID,0

KEYW,PR_ELMAG,0

KEYW,MAGNOD,0??

KEYW,MAGEDG,0??

KEYW,MAGHFE,0??

KEYW,MAGELC,0??

KEYW,PR_MULTI,0

KEYW,PR_CFD,0??

/GO

!*?

/COM,??

/COM,Preferences for GUI filtering have been set to display:

/COM,? Structural??

!*?

FINISH?

/SOL

FINISH?

/PREP7?

!*?

MPTEMP,,,,,,,,?

MPTEMP,1,0?

MPDATA,EX,1,,2e11??

MPDATA,PRXY,1,,0.3?

MPTEMP,,,,,,,,?

MPTEMP,1,0?

MPDATA,DENS,1,,7800

SECTYPE,?? 1, BEAM, RECT, beam, 0??

SECOFFSET, CENT

SECDATA,0.01,0.02,5,5,0,0,0,0,0,0,0,0??

sect,2,shell,,shell

secdata, 0.02,1,0.0,3? ?

secoffset,MID??

seccontrol,,,, , , ,

K,1,,,,

K,2,1.5,,,?

K,3,1.5,1,,

K,4,0,1,,??

/DIST,1,0.924021086472,1

/REP,FAST??

/DIST,1,0.924021086472,1

/REP,FAST??

/DIST,1,0.924021086472,1

/REP,FAST??

/DIST,1,1.08222638492,1

/REP,FAST??

/DIST,1,1.08222638492,1

/REP,FAST??

/DIST,1,1.08222638492,1

/REP,FAST??

/DIST,1,1.08222638492,1

/REP,FAST??

/DIST,1,1.08222638492,1

/REP,FAST??

/DIST,1,1.08222638492,1

/REP,FAST??

/DIST,1,1.08222638492,1

/REP,FAST??

/DIST,1,1.08222638492,1

/REP,FAST??

/DIST,1,1.08222638492,1

/REP,FAST??

FLST,3,4,3,ORDE,2??

FITEM,3,1??

FITEM,3,-4?

KGEN,2,P51X, , , , ,1, ,0??

/USER,? 1??

/VIEW,? 1,? 0.499743677250??? ,? 0.632460883625E-01,? 0.863861209545

/ANG,?? 1,?? 1.40768393449?

/REPLO?

LSTR,?????? 8,?????? 4?

LSTR,?????? 5,?????? 1?

LSTR,?????? 6,?????? 2?

LSTR,?????? 7,?????? 3?

FLST,2,4,3?

FITEM,2,8??

FITEM,2,7??

FITEM,2,6??

FITEM,2,5??

A,P51X?

/VIEW,? 1,? 0.817815709564??? ,? 0.105416652733E-01,? 0.575383644609

/ANG,?? 1,?? 2.69930845940?

/REPLO?

/VIEW,? 1,? 0.937134166154??? , -0.122308043784??? ,? 0.326833745278

/ANG,?? 1,?? 2.14167463155?

/REPLO?

LPLOT??

FLST,5,4,4,ORDE,2??

FITEM,5,1??

FITEM,5,-4?

CM,_Y,LINE?

LSEL, , , ,P51X

CM,_Y1,LINE

CMSEL,S,_Y?

!*?

!*?

CMSEL,S,_Y1

LATT,1, ,1, , , ,1?

CMSEL,S,_Y?

CMDELE,_Y??

CMDELE,_Y1?

!*?

CM,_Y,AREA?

ASEL, , , ,?????? 1

CM,_Y1,AREA

CMSEL,S,_Y?

!*?

CMSEL,S,_Y1

AATT,?????? 1, ,?? 2,?????? 0,?? 2?

CMSEL,S,_Y?

CMDELE,_Y??

CMDELE,_Y1?

!*?

FLST,5,4,4,ORDE,2??

FITEM,5,1??

FITEM,5,-4?

CM,_Y,LINE?

LSEL, , , ,P51X

CM,_Y1,LINE

CMSEL,,_Y??

!*?

LESIZE,_Y1, , ,30, , , , ,1

!*?

FLST,2,4,4,ORDE,2??

FITEM,2,1??

FITEM,2,-4?

LMESH,P51X?

FLST,5,2,4,ORDE,2??

FITEM,5,5??

FITEM,5,7??

CM,_Y,LINE?

LSEL, , , ,P51X

CM,_Y1,LINE

CMSEL,,_Y??

!*?

LESIZE,_Y1, , ,30, , , , ,1

!*?

FLST,5,2,4,ORDE,2??

FITEM,5,6??

FITEM,5,8??

CM,_Y,LINE?

LSEL, , , ,P51X

CM,_Y1,LINE

CMSEL,,_Y??

!*?

LESIZE,_Y1, , ,20, , , , ,1

!* ?

MSHKEY,0

CM,_Y,AREA?

ASEL, , , ,?????? 1

CM,_Y1,AREA

CHKMSH,'AREA'??

CMSEL,S,_Y?

!*?

AMESH,_Y1??

!*?

CMDELE,_Y??

CMDELE,_Y1?

CMDELE,_Y2?

!*?

FINISH?

/SOL

!*?

ANTYPE,4

!*?

TRNOPT,FULL

LUMPM,0

!*?

FLST,2,4,3,ORDE,2??

FITEM,2,1??

FITEM,2,-4?

!*?

/GO

DK,P51X, , , ,0,ALL,UX, , , , ,

NSUBST,50,0,0??

OUTRES,ERASE

OUTRES,ALL,ALL?

AUTOTS,0

TIME,2?

FLST,2,1,5,ORDE,1??

FITEM,2,1??

/GO

!*?

SFA,P51X,1,PRES,10000??

LSWRITE,1,?

FLST,2,1,5,ORDE,1??

FITEM,2,1??

SFADELE,P51X,1,PRES

KBC,1??

TIME,5?

FLST,2,1,5,ORDE,1??

FITEM,2,1??

/GO

!*?

SFA,P51X,1,PRES,10000??

LSWRITE,2,?

FLST,2,1,5,ORDE,1??

FITEM,2,1??

SFADELE,P51X,1,PRES

TIME,8?

FLST,2,1,5,ORDE,1??

FITEM,2,1??

/GO

!*?

SFA,P51X,1,PRES,5000

LSWRITE,3,?

FLST,2,1,5,ORDE,1??

FITEM,2,1??

SFADELE,P51X,1,PRES

LSSOLVE,1,3,1,?

FINISH?

/POST1?

!*?

PLNS,U,Z

ANTIME,10,0.5, ,1,2,0,8

!*?

FINISH?

/SOL

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第三題

譜分析是一種將模態(tài)分析結果和已知譜聯(lián)系起來的計算結構響應的分析方法，主要用于確定結構對隨機載荷或隨時間變化載荷的動力響應。譜分析可分為時間-歷程分析和頻域的譜分析。時間-歷程譜分析主要應用瞬態(tài)動力學分析。譜分析可以代替費時的時間-歷程分析，主要用于確定結構對隨機載荷或時間變化載荷（地震、風載、海洋波浪、噴氣發(fā)動機推力、火箭發(fā)動機振動等）的動力響應情況。 譜分析的主要應用包括核電站（建筑和部件），機載電子設備（飛機/導彈），宇宙飛船部件、飛機構件，任何承受地震或其他不規(guī)則載荷的結構或構件，建筑框架和橋梁等。其主要的步驟是：

1、???????? 建立模型

2、???????? 求得模態(tài)解

3、???????? 求得譜解

4、???????? 擴展模態(tài)

5、???????? 模態(tài)合并

6、???????? 觀察結果

第四題

有限差分：準確的問題模型，近似的解法。

有限元：近似的問題模型，精確（近似精確）的解法。

有限元方法的基礎是變分原理和加權余量法。常見的有限元計算方法是由變分法和加權余量法發(fā)展而來的里茲法和伽遼金法、最小二乘法等。根據所采用的權函數和插值函數的不同，有限元方法也分為多種計算格式。從權函數的選擇來說，有配置法、矩量法、最小二乘法和伽遼金法，從計算單元網格的形狀來劃分，有三角形網格、四邊形網格和多邊形 網格，從插值函數的精度來劃分，又分為線性插值函數和高次插值函數等。不同的組合 同樣構成不同的有限元計算格式。對于權函數，伽遼金(Galerkin)法是將權函數取為逼近函數中的基函數 ；最小二乘法是令權函數等于余量本身，而內積的極小值則為對代求系數的平方誤差最??；在配置法中，先在計算域內選取N個配置點 。令近似解在選定的N個配置點上嚴格滿足微分方程，即在配置點上令方程余量為0。插值函數一般由不同次冪的多項式組成，但也有采用三角函數或指數函數組成的乘積表示，但最常用的多項式插值函數。

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節(jié)點和單元

類似于一個六面體，各頂點在ansys中稱之為節(jié)點(node)，而這個六面體本身被稱之為單元(element).