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草田露銀蟲 (初入文壇)
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[求助]
關于力場的編寫 求擅長towhee的大神指導! 已有1人參與
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打算模擬二氯甲烷的氣液相密度,選用了OPLS-1996中適合二氯甲烷的一些參數,編寫力場如下: towhee_ff Version 14 Number of Nonbonded Types 2 Potential Type Lennard-Jones Classical Mixrule Geometric Atom Type Number 1 Nonbond Coefficients 0.3800000000E+01 0.5937955880E+02 0.3800000000E+01 0.2968977940E+02 Mass 0.1201070000E+02 Element C Bond Pattern null Base Charge 0.5000000000E+00 Polarizability 0.1000000000E+01 Force Field Name OPLS-1996 Atom Names C C C C Atom Type Number 2 Nonbond Coefficients 0.3400000000E+01 0.1509649800E+03 0.3400000000E+01 0.7548249000E+02 Mass 0.3545300000E+02 Element Cl Bond Pattern null Base Charge -0.2500000000E+00 Polarizability 0.1000000000E+01 Force Field Name OPLS-1996 Atom Names Cl Cl Cl Cl Number of Bonded Terms 1 Bond Type Number 1 Bond Style 1 Bond Coefficients 0.1772000000E+01 Vibration Order single Force Field Name OPLS-1996 Number of Atoms with Same Parameters 1 Atom Names C Cl Number of Angle Terms 1 Angle Type Number 1 Angle Style 1 Angle Coefficients 0.1118000000E+03 0.9057898800E+05 Angle Order wild Force Field Name OPLS-1996 Number of Atoms with Same Parameters 1 Atom Names Cl C Cl Number of Torsion Terms 0 Number of Improper Terms 0 Number of Angle-Angle Terms 0 Number of One-Five Types 0 Number of Bond Increments 0 input文件如下: inputformat 'Towhee' ensemble 'nvt' temperature 324.0d0 nmolty 1 nmolectyp 300 numboxes 2 stepstyle 'cycles' nstep 30000 controlstyle 'equilibration' potentialstyle 'internal' ffnumber 1 ff_filename /home/user1/towhee/towhee-7.0.2/ForceFields/towhee_ff_OPLS-1996 classical_potential 'Lennard-Jones' classical_mixrule 'Geometric ' lshift .false. ltailc .true. rmin 0.8d0 rcut 10.0d0 rcutin 10.0d0 electrostatic_form 'coulomb' coulombstyle 'ewald_fixed_kmax' kalp 5.6d0 kmax 5 dielect 1.0d0 linit .ture. initboxtype 'dimensions' initstyle 'full cbmc' 'full cbmc' initlattice 'simple cubic' 'simple cubic' initmol 240 60 inix iniy iniz 8 8 7 4 4 4 hmatrix 29.90d0 0.0d0 0.0d0 0.0d0 29.90d0 0.0d0 0.0d0 0.0d0 29.90d0 121.82d0 0.0d0 0.0d0 0.0d0 121.82d0 0.0d0 0.0d0 0.0d0 121.82d0 pmvol 0.002d0 pmvlpr 1.0d0 rmvol 0.1d0 tavol 0.5d0 pmcb 0.354d0 pmcbmt 1.0d0 pmall 0.0d0 pmtracm 0.675d0 pmtcmt 1.0d0 rmtrac 0.5d0 tatrac 0.5d0 pmrotate 1.0d0 pmromt 1.0d0 rmrot 0.05d0 tarot 0.5d0 cbmc_formulation 'Martin and Frischknecht 2006' cbmc_setting_style 'Martin and Frischknecht' # input_style 'basic connectivity map' nunit 3 nmaxcbmc 3 lpdbnames F forcefield 'OPLS-1996' charge_assignment 'bond increment' unit ntype qqatom 1 'Cl' -0.250d0 vibration 1 2 improper torsion 0 unit ntype qqatom 2 'C' 0.500d0 vibration 2 1 3 improper torsion 0 unit ntype qqatom 3 'Cl' -0.250d0 vibration 1 2 improper torsion 0 在towhee軟件中運行時,outpu文件中出現這樣的錯誤, Building the input file for molecule type: 1 unit: 1 name:Cl unit: 2 name:C unit: 3 name:Cl parameters not found for bond atoms: 1 and: 2 vib: 1 names: Cl C 希望好心人幫忙指點一二 ![]() 另附上力場及input文件 |
木蟲 (正式寫手)
銀蟲 (初入文壇)
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