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zhouyongaoe鐵蟲(chóng) (初入文壇)
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[求助]
請(qǐng)問(wèn)ANSYS中LSSOLVE命令與SOLVE的區(qū)別 已有2人參與
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(1)當(dāng)千斤頂?shù)膲毫≤5.1噸時(shí),采用較大的增量步長(zhǎng),迭代算法選用Newton-Raphson方法與附加載荷法。 (2)P>5.1噸時(shí),結(jié)構(gòu)已較大范圍發(fā)生開(kāi)裂,接近于極限承載狀態(tài),并可能有材料進(jìn)入塑性屈服的下降段,為使計(jì)算法順利進(jìn)行,用弧長(zhǎng)法計(jì)算,并且用較小的增量步長(zhǎng)。 這個(gè)是我在進(jìn)行鋼筋混凝土簡(jiǎn)支梁的極限荷載求解時(shí)的方法。我打算用LSSOLVE命令來(lái)實(shí)現(xiàn)。 |
鐵蟲(chóng) (初入文壇)
鐵蟲(chóng) (初入文壇)
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命令流沒(méi)什么好看的了,就是跟著我前面說(shuō)的來(lái)設(shè)置的。 /SOLU ANTYPE,0 !施加約束 NSEL,S,LOC,Z,80,240 NSEL,R,LOC,Y,0 D,ALL,UY ALLSEL,ALL !施加荷載 PO=100000 /PSF,PRES,NORM,2,0,1 ESEL,S,ELEM,,1104,1156,26 ESEL,A,ELEM,,1234,1312,26 ESEL,A,ELEM,,1200 SFE,ALL,4,PRES,,PO/160/1060 ALLSEL,ALL TIME,1 OUTRES,ALL,ALL KBC,0!設(shè)定荷載為斜坡荷載 NSUBST,500!荷載子步為500 AUTOTS,ON!打開(kāi)自動(dòng)時(shí)間步 NROPT,FULL!完全的NR法 NEQIT,20!每個(gè)荷載子步迭代次數(shù)為40 CNVTOL,F,,0.05!使用位移收斂準(zhǔn)則,收斂誤差為5% ALLSEL,ALL LSWRITE,1 PO=150000 /PSF,PRES,NORM,2,0,1 ESEL,S,ELEM,,1104,1156,26 ESEL,A,ELEM,,1234,1312,26 ESEL,A,ELEM,,1200 SFE,ALL,4,PRES,,PO/160/1060 ALLSEL,ALL TIME,2 OUTRES,ALL,ALL KBC,0!設(shè)定荷載為斜坡荷載 NSUBST,1000!荷載子步為1000 AUTOTS,ON!打開(kāi)自動(dòng)時(shí)間步 NROPT,FULL!完全的NR法 NEQIT,40!每個(gè)荷載子步迭代次數(shù)為40 CNVTOL,F,,0.05!使用位移收斂準(zhǔn)則,收斂誤差為5% ALLSEL,ALL LSWRITE,2 OUTRES,ALL,ALL NCNV,2 LSSOLVE,1,2 最后在后處理里面查看荷載和時(shí)間步,發(fā)現(xiàn)當(dāng)TIME=1時(shí)的荷載為第二個(gè)荷載即150000,當(dāng)TIME=2時(shí)的荷載為第二個(gè)荷載的兩倍即300000。跟我設(shè)置的第一個(gè)荷載步完全沒(méi)關(guān)系了 |
金蟲(chóng) (正式寫(xiě)手)
[尾張傻瓜]

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