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cpylovelove銅蟲 (小有名氣)
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[求助]
動力學(xué)模擬固定鍵長 已有2人參與
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| 用Discover做動力學(xué)模擬的時候想固定部分鍵長再跑動力學(xué),那固定原子的時候應(yīng)該固定笛卡爾坐標還是分數(shù)坐標?還是兩個都固定?試了一下兩個都固定,先跑了1ns,晶胞參數(shù)沒變,接著跑1ns,參數(shù)變了很多,而且開始的時候能量和溫度還是有很大起伏,與前1ns類似。 |
主管區(qū)長 (職業(yè)作家)
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專家經(jīng)驗: +1059 |
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The Edit Constraints dialog also allows measurements and cell parameters to be constrained, however Discover ignores such constraints. Discover: Supports atom positions fixed in Cartesian space, but ignores partial constraints on the x, y, or z components of Cartesian atom positions, constraints on fractional positions, and geometric constraints. |

專家顧問 (著名寫手)
伊卡斯特的小豬
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專家經(jīng)驗: +503 |

專家顧問 (著名寫手)
伊卡斯特的小豬
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專家經(jīng)驗: +503 |
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好像說錯了…… DMol3: Supports atom positions fixed in Cartesian space, and partial constraints on the x, y, or z components of Cartesian atom positions, but ignores constraints on fractional positions and lattice parameters. Additionally, DMol3 supports fixed interatomic distances, angles, and torsions in nonperiodic structures. Forcite: Supports atom positions fixed in Cartesian or fractional space and fixed lattice parameters, but ignores partial constraints on the x, y, or z components of Cartesian atom positions and geometric constraints. Fractional constraints are not supported for Dynamics calculations. 好像forcite沒明確說支持distance限制……只能試試看了 |

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