ADAMS 初级培训

1、1 2 lBasic Concept lUsing Software lApplication Examples 3 lADAMS : Automatic Dynamic Analysis Mechanical System lResearch Object：mechanical system lResearch Area：kinematics and dynamics 4 uStudy of motion of a system without regard to motivating forces uAll degrees of freedom are prescribed as func

2、tions of time uConcentration on the right hand side of F=MA uForces cannot affect motion uForces calculated as a consequence of motion uDisplacement, velocity, acceleration and reaction force solution is algebraic in nature uNo need to solve differential equations Consequence Definition 5 uStudy of

3、motion of a system as a consequence of applied forces and inertia forces uConcentration on both sides of F=MA uDisplacement, velocity, acceleration and reaction force calculation of single or multiple degree of freedom systems uForces affect accelerations uAccelerations are integrated to velocities

4、uVelocities are iterated to give displacements u2nd order differential equations are to be solved Consequence Definition 6 Mainly modules： lADAMS/View lADAMS/Solver lADAMS/Postprocessor 7 build test validate refine iterate optimize 1.Creat parts 2.constrain the parts 3.define forces action on the pa

5、rts 1.Measure characteristics 2.simulation 3.animations 4.results plots Import test data 1. friction 2.flexible body 3.force functions 1.Add parametric 2.define design variables 1.sensitivity 2.design study 3.optimization compare？ Y N 8 Set units Set gravity 9 Coordinate systemStatus barCoordination

6、 window titleWork grid menu 10 lRigid bodies lFlexible bodies lPoint mass lGround 11 Build parts: 1.Tool box 2.Cad software 12 TypeToolGraphicParameter s Boxes Cylinders Spheres/ Ellipsoids Frustums Torus Length (x), Height (y), Depth(z), Anchor CSM, Parent Part Length (z), Radius, Anchor CSM, Paren

7、t Part 3-Diameters, Anchor CSM, Parent Part Radius of Ring (xy plane), Radius of Circular Cross- section ( to xy plane), Anchor CSM, Parent Part Length(z), Bottom and Top Radii, Anchor CSM, Parent Part 13 TypeToolGraphicParameters Links Plates Extrusions Revolutions Width, Depth,2 Anchor CSM (Length

8、), Parent Part Thickness, Radius, Vertex Locations, Anchor CSM, Parent Part Open/Closed Profile, Depth, Anchor CSM, Parent Part Open/Closed Profile, Sweep Angle, Anchor CSM, Parent Part 14 Chamfer Fillet Hole Boss ShellShell 15 lGeometry (locations of nodes and node connectivity) lNodal mass and ine

9、rtia lMode shapes lGeneralized mass and stiffness for mode shapes 16 lAbaqus adams job=jobname input=input-file se_recovery_job=se_recovery_job-name units=mmks | mks | cgs | ips length=length-units-name mass=mass-units-name time=time-units-name force=force-units-name lAbaqus job=jobname interactive

10、lAbaqus adams job=jobname input=input-file make_se_recovery stress_modes=ON | OFF strain_modes=ON | OFF section_point=section_point_number 17 * - *NSET,NSET=RETNODES node1, node2,node3 *STEP *FREQUENCY,EIGENSOLVER=LANCZOS 20, *BOUNDARY RETNODES, 1,6 *ELEMENT MATRIX OUTPUT, MASS=YES, ELSET=ALL *NODE

11、FILE U *EL FILE, POSITION=NODES, DIRECTIONS=YES 1, S, E *END STEP * * - * * SUBSTRUCTURE GENERATION * *STEP *SUBSTRUCTURE GENERATE, TYPE=Z1, RECOVERY MATRIX=YES, MASS MATRIX=YES, OVERWRITE *RETAINED NODAL DOFS, SORTED=NO RETNODES, 1,6 *RETAINED EIGENMODES, GENERATE 1,20 *SUBSTRUCTURE MATRIX OUTPUT,

12、STIFFNESS=YES, MASS=YES, RECOVERY=YES *END STEP 18 lIdealized joints lJoint primitives lMotions generators lContact 19 Build | Forces 1. Apply forces 2. Flexible connectors 3. Special forces 4. Contact forces 20 Build measures lBuild| Measure all measures lpoint-to-point and included angle measures

13、lright cursor measure object and point measures 21 run reset stop start control 22 1.Plot objects 2.Plot measures 3.Plot results 4.Plot requests 23 lKinemics simulation lDynamic analysis lFE fatigue 24 25 1 2 3 4 5 6 8 7 26 27 28 29 30 lFs+Gh+T x=0 F-hand force G-gravity T-air spring force 31 32 Mot

14、ion:fun=30sin(5*time) Motion:fun=10sin(10*time) 33 34 Mnf files Dynamic simulation Export modal coordinates(*.dac) And n-code format FES files Start ncode View results(*.unv) 35 flexible body Rigid body 36 37 1.Ground 2.Dummy 3.Flexbody 1 (shaft) 4.Flexbody 2 (rod) 5.piston shaft rod piston Parts: Constrain: Joint 1: (ball) Ground and dummy Joint 2: (fix) Dummy and shaft Joint 3: (rev) shaft and rod Joint 4: (ball) shaft and grond Joint 5: (rev) rod and piston Joint 6: (trans) piston and ground 38 Motion: velo(time) Step(time,0,0,0.05,32000d) Angular velocity (joint 1) t