轮胎起重机稳定性 支腿反力 计算.docx

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轮胎起重机稳定性支腿反力计算

轮胎起重机稳定性支腿反力计算

轮胎起重机稳定性、支腿反力计算

1、基本符号及参数

回转支承以下结构自重(不包含回转支承自重)mg1,重心坐标Xg1,Yg1,Zg1,风力作用面积及中心高areaw1x,Zw1x,areaw1y,Zw1y。

回转支承下安装面高度Hz21(支腿),hz211(轮胎)

支腿纵向间距s

支腿横向间距b

回转中心线相对于支承面形心的偏心距ex,ey。

坡度角angleps,anglepb。

采用轮胎支撑援用支腿纵横向间距概念,轴距LS,轮距LB。

计算基准:

回转中心线、支腿支承面/轮胎支承面。

回转支承以上固定部分结构自重mg21,重心坐标Xg21,Yg21,Zg21,风力作用:

areaw21x,Zw21x,areaw21y,Zw21y,xw21y。

回转支承以上摆动部分结构自重mg2b,重心坐标Xg2b,Yg2b,Zg2b,风力作用:

areaw2bx,Zw2bx,areaw2by,zw2by,xw2by。

回转支承以上结构自重mg2,重心坐标Xg2,Yg2,Zg2,风力作用:

areaw2x,Zw2x,areaw2y,zw2y,xw2y。

臂架下铰点坐标Xb,Yb,Zb。

计算基准:

回转中心线、回转支承下安装面。

不包括取物装置(吊钩等)。

臂架长度L0(i),质量、重心及迎风面积mgb(i),xgb(i),ygb(i),zgb(i),areawgbx(i),xwgbx(i),areawgby(i),xwgby(i)。

基准:

对臂架尾部铰点及纵轴线。

头部结构尺寸L11,L12,L13。

臂架头部等效质mgbeq

有效起升载荷mgq。

吊钩质量mgd。

attentiontoimprovingthequalityandefficiencyofdevelopmentandpaymoreattentiontosecurityandreformthepeople'slivelihood,morefocusonmaintainingsocialharmonyandstability,andpromotethedevelopmentoftownshipeconomyinabetterandfaster,createanewnormalXXdevelopmentandlayamoresolidfoundationforXXbuildawell-offsociety.Completedtasksthisyear,wemustalwayspayspecialattentiontotheprimarytaskofdevelopment.XXweakeconomicbase,lowlevelsofdevelopment,economicconstructionistheCenter,wehavetocreateconditionsforfastereconomicdevelopment,accumulatingmorewealth,betterpeople'slives.Effortshouldbemadetothisyear'seconomicgrowth,revenuegrowth,peoplehavemaintainedahighrateofincomegrowth,GDPgrowthofmorethan15percentrespectively.Alwaysgraspthefundamentalimpetusforreform.Wearenow"nosoldiersbehind"manyindicatorsrankedinthebottomofthecountyfromgettingbigger.Onlybygoingallouttohardwork,hardwork,innovation,reformdoesnotadapttoinstitutionalmechanisms,practices,itispossibletochangethefaceofXXpoor,intoawell-offsocietytogetherwithpeopleacrossthecountry.Wewanttobreaktheoldpatternsofthinking,methodsandorganizationofwork,bravelyandboldlyinto,makingfulluseofalltheadvantages,comprehensivereforms,tomakeallitsvitalityfordevelopmentimpulse,letfullplaytoallsourcesofwealthcreation.Shouldalwaysstability

动滑轮组、拉臂绳质量及长度mgdh,mgdk(i),ldk(i)。

n回转速度rpm,Time2回转起制动时间s。

Angle臂架仰角

Angleaa1臂架平面内货物偏摆角,Angleaa2垂直臂架平面货物偏摆角。

自重冲击系数coffw1。

起升动载系数coffw2。

vhs,vrs起升、变幅单绳绳速。

mhs,mrs钢丝绳单位长度质量。

货物悬挂高度Hzq。

上车臂架轴线与底架纵向轴线的夹角anglebx。

2、整机重心及迎风面计算

整机重心(计算基准为回转中心线,支承面)

attentiontoimprovingthequalityandefficiencyofdevelopmentandpaymoreattentiontosecurityandreformthepeople'slivelihood,morefocusonmaintainingsocialharmonyandstability,andpromotethedevelopmentoftownshipeconomyinabetterandfaster,createanewnormalXXdevelopmentandlayamoresolidfoundationforXXbuildawell-offsociety.Completedtasksthisyear,wemustalwayspayspecialattentiontotheprimarytaskofdevelopment.XXweakeconomicbase,lowlevelsofdevelopment,economicconstructionistheCenter,wehavetocreateconditionsforfastereconomicdevelopment,accumulatingmorewealth,betterpeople'slives.Effortshouldbemadetothisyear'seconomicgrowth,revenuegrowth,peoplehavemaintainedahighrateofincomegrowth,GDPgrowthofmorethan15percentrespectively.Alwaysgraspthefundamentalimpetusforreform.Wearenow"nosoldiersbehind"manyindicatorsrankedinthebottomofthecountyfromgettingbigger.Onlybygoingallouttohardwork,hardwork,innovation,reformdoesnotadapttoinstitutionalmechanisms,practices,itispossibletochangethefaceofXXpoor,intoawell-offsocietytogetherwithpeopleacrossthecountry.Wewanttobreaktheoldpatternsofthinking,methodsandorganizationofwork,bravelyandboldlyinto,makingfulluseofalltheadvantages,comprehensivereforms,tomakeallitsvitalityfordevelopmentimpulse,letfullplaytoallsourcesofwealthcreation.Shouldalwaysstability

臂架

Xgb1=xb,xgb(i),cos(,angle),zgb(i),sin(,angle)Zgb1=zb,zgb(i),cos(,angle),xgb(i),sin(,angle)Ygb1=ygb(i)

变幅拉臂绳组

Xk=xb,(l0(i),l12),cos(,angle),l13,sin(,angle)zk=zb,l13,cos(,angle),(l0(i),l12),sin(,angle)

22(xk,xm),(zk,zm)lkm=

zk,zmangkmh=atan()xk,xm

mgrs=(lkm,ldk(i)),ar,mrs

变幅动滑轮组总质量mgdr

Mgdr=mgrs,mgdh,mgdk(i)

Xgdr=

(lkm,ldk(i))ldk(i)(,mgrs,mgdh,(lkm,ldk(i)),mgdk(i),(lkm,)),cos(angkmh))22xm,mgdr

Zgdr=

(lkm,ldk(i))ldk(i)(,mgrs,mgdh,(lkm,ldk(i)),mgdk(i),(lkm,)),sin(angkmh))22zm,mgdr

臂架摆动部分重心及迎风面积

Mg2b=mgb(i),mgdr

mgb(i),xgb1,mgdr,xgdrXg2b=mg2b

attentiontoimprovingthequalityandefficiencyofdevelopmentandpaymoreattentiontosecurityandreformthepeople'sliv3/16elihood,morefocusonmaintainingsocialharmonyandstability,andpromotethedevelopmentoftownshipeconomyinabetterandfaster,createanewnormalXXdevelopmentandlayamoresolidfoundationforXXbuildawell-offsociety.Completedtasksthisyear,wemustalwayspayspecialattentiontotheprimarytaskofdevelopment.XXweakeconomicbase,lowlevelsofdevelopment,economicconstructionistheCenter,wehavetocreateconditionsforfastereconomicdevelopment,accumulatingmorewealth,betterpeople'slives.Effortshouldbemadetothisyear'seconomicgrowth,revenuegrowth,peoplehavemaintainedahighrateofincomegrowth,GDPgrowthofmorethan15percentrespectively.Alwaysgraspthefundamentalimpetusforreform.Wearenow"nosoldiersbehind"manyindicatorsrankedinthebottomofthecountyfromgettingbigger.Onlybygoingallouttohardwork,hardwork,innovation,reformdoesnotadapttoinstitutionalmechanisms,practices,itispossibletochangethefaceofXXpoor,intoawell-offsocietytogetherwithpeopleacrossthecountry.Wewanttobreaktheoldpatternsofthinking,methodsandorganizationofwork,bravelyandboldlyinto,makingfulluseofalltheadvantages,comprehensivereforms,tomakeallitsvitalityfordevelopmentimpulse,letfullplaytoallsourcesofwealthcreation.Shouldalwaysstability

mgb(i),ygb1Yg2b=mg2b

mgb(i),zgb1,mgdr,zgdrZg2b=mg2b

Areaw2bx=areawgbx(i),sin(angle)Areaw2by=areawgby(i)

Zw2bx=zb,xwgbx(i),sin(angle)Zw2by=zb,xwgby(i),sin(angle)Xw2by=xb,xwgby(i),cos(angle)(变幅绳及动滑轮组迎风面积忽略不计)

上车重心及迎风面积(不含起升吊钩、起升钢丝绳)

Mg2=mg21,mg2b

xg21,mg21,xg2b,mg2bXg2=mg2

yg21,mg21,yg2b,mg2bYg2=mg2

zg21,mg21,zg2b,mg2bZg2=mg2

areaw21x,areaw2bxAreaw2x=Areaw2y=areaw21y,areaw2by

areaw21x,zw21x,areaw2bx,zw2bxZw2x=areaw2x

areaw21y,zw21y,areaw2by,zw2byZw2y=areaw2y

areaw21y,xw21y,areaw2by,xw2byxw2y=areaw2y

整机重心

attentiontoimprovingthequalityandefficiencyofdevelopmentandpaymoreattentiontosecurityandreformthepeople'slivelihood,morefocusonmaintainingsocialharmonyandstability,andpromotethedevelopmentoftownshipeconomyinabetterandfaster,createanewnormalXXdevelopmentandlayamoresolidfoundationforXXbuildawell-offsociety.Completedtasksthisyear,wemustalwayspayspecialattentiontotheprimarytaskofdevelopment.XXweakeconomicbase,lowlevelsofdevelopment,economicconstructionistheCenter,wehavetocreateconditionsforfastereconomicdevelopment,accumulatingmorewealth,betterpeople'slives.Effortshouldbemadetothisyear'seconomicgrowth,revenuegrowth,peoplehavemaintainedahighrateofincomegrowth,GDPgrowthofmorethan15percentrespectively.Alwaysgraspthefundamentalimpetusforreform.Wearenow"nosoldiersbehind"manyindicatorsrankedinthebottomofthecountyfromgettingbigger.Onlybygoingallouttohardwork,hardwork,innovation,reformdoesnotadapttoinstitutionalmechanisms,practices,itispossibletochangethefaceofXXpoor,intoawell-offsocietytogetherwithpeopleacrossthecountry.Wewanttobreaktheoldpatternsofthinking,methodsandorganizationofwork,bravelyandboldlyinto,makingfulluseofalltheadvantages,comprehensivereforms,tomakeallitsvitalityfordevelopmentimpulse,letfullplaytoallsourcesofwealthcreation.Shouldalwaysstability

mg1,xg1,mg2,(xg2,cos(,anglebx),yg2,sin(,anglebx))Xg=mg1,mg2

mg1,yg1,mg2,(yg2,cos(,anglebx),xg2,sin(,anglebx))Yg=mg1,mg2

mg1,zg1,mg2,(hz21,zg2)Zg=mg1,mg2

按质量等效原则折算到臂架头部的等效质量

mgbeq=

mgb(i),xgb(i)

l0(i)

(lkm,ldk(i))ldk(i)mgrs,,mgdh,(lkm,ldk(i)),mgdk(i),(lkm,)l0(i),l1222,,lkml0(i)

3、稳定性计算

Kmg自重计算系数;kmq载荷计算系数;kw风载荷计算系数;kh水平力计算系数

3.1、基本稳定性

Mghs=(i)0.4,l0(i),mhs,ah

Mq=mgdg,mgq,mghs

Hzq=hz21,zb,l11,cos(,angle),l0(i),sin(,angle)

对倾覆边ABanglebx=0

s9.8,kmg,(mg1,mg2),((,ex,xg),cos(angleps),zg,sin(angleps))2Mwab1=s,9.8,kmq,mq,((r,,ex),cos(angleps),hzq,sin(angleps))2

对倾覆边BCanglebx=90

b9.8,kmg,(mg1,mg2),((,ey,yg),cos(anglepb),zg,sin(anglepb))2Mwbc1=b,9.8,kmq,mq,((r,,ey),cos(anglepb),hzq,sin(anglepb))2

attentiontoimprovingthequalityandefficiencyofdevelopmentandpaymoreattentiontosecurityandreformthepeople'sliv5/16elihood,morefocusonmaintainingsocialharmonyandstability,andpromotethedevelopmentoftownshipeconomyinabetterandfaster,createanewnormalXXdevelopmentandlayamoresolidfoundationforXXbuildawell-offsociety.Completedtasksthisyear,wemustalwayspayspecialattentiontotheprimarytaskofdevelopment.XXweakeconomicbase,lowlevelsofdevelopment,economicconstructionistheCenter,wehavetocreateconditionsforfastereconomicdevelopment,accumulatingmorewealth,betterpeople'slives.Effortshouldbemadetothisyear'seconomicgrowth,revenuegrowth,peoplehavemaintainedahighrateofincomegrowth,GDPgrowthofmorethan15percentrespectively.Alwaysgraspthefundamentalimpetusforreform.Wearenow"nosoldiersbehind"manyindicatorsrankedinthebottomofthecountyfromgettingbigger.Onlybygoingallouttohardwork,hardwork,innovation,

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