ANSYS Motion 2019 R3

[mitsumi]

ANSYS Motion 2019 R3 | 1.1 Gb

The Ansys product team is pleased to announce the availability of Motion 2019 R3 is a next generation engineering solution based on flexible multibody dynamics. It enables fast and accurate analysis of rigid and flexible bodies within a single solver system.

ANSYS Motion 2019 R3 Release Note

This chapter will introduce new functions in ANSYS Motion 2019 R1/R2/R3.

GearSetForce Displayin Drivetrain
The force vector of gear tooth contact will be displayed on an actual contact face by using Force Display function. Lots of detail behaviors  between  gear pair can be monitored using the normal and friction force displaying.
Using of GearSetForce Display
In order to display GearSet Force, a pair of gears that is subjected to display must be selected in  Assembly  Manager  before  the  simulation.  Due to the using a "*.uvec"  file for displaying vectors, previous simulation result can't be used and the new analysis is required.
User Subroutine for Vector Display (Display Functions)
A force display functions have been developed for a user subroutine and its function name are as follows.'SET_USERDEFINEDVECTOR_FORCE''SET_USERDEFINEDVECTOR_TORQUE'

Cylindrical Roller Bearing
Cylindrical Roller  Bearing  libraries have  been added  in  Drivetrain.  It  also  supportsthe  life cycle and strength based on ISO281 and ISO16281.

GapBushing
Gap Bushing option is available if v-F Spline is used instead of K Coefficientin Bushing Property. Gap Bushing option makes the damping coefficient becomes zero when its stiffness becomes zero during simulation so that damping force is not happened even the relative velocity exist

Pacejka Tire
Pacejka Tireis added in Tire force. Pacejka Tire uses the formulation based on MF Tire/Swift 6.1.2.To use Pacejka Tire, the value of 'PROPERTY_FILE_FORMAT'must be changed to 'pac'in *.tir file.

PCG Solver
A new iteration solver of PCG(Preconditioned Conjugate Gradients) has been developed. PCG solver is generally good for a large scale problem roughly greater than 100,000 D.O.F. The PCG Solver has generally a good scalability on multi-core and multi-CPU computers.
Solving Performance
Several  modelshavebeencompared  to see the performance. FE Nodal body model is tested.
Limitation of usage
Thecurrent  PCG  solver has released as a beta version. If non-avialable body is included in the model and  PCG  solver  is  checked,the  solver  type  is automatically changed to Sparse solver.
License of PCG solver
During beta testing, you can freely use the solver. When the beta test is finished, this solver will require new license.

Elasto-Hydro Dynamic Bearing
Journal  bearing  based  onEHD  (Elasto-Hydro  Dynamic)  analysis  is  available  in  the Drivetrain toolkit. The new function solvesthe Reynolds equation to calculatepressure pattern applied between twosurfacesseparated by lubricationoil.  Thewell-known equation for  the  EHD  bearing is simplifiedfrom  the  Navier-Stokes  equation  under following  assumptions of a Newtonian  fluid, thin-film thickness, and laminar flow. The  new  function supports a cylindrical journal type  on the rigid body and  flexible body(nodal  & modal) except for the EasyFlex bodyas.
Pre & post processor
In order to define EHD bearing, oil properties, surface properties and geometry conditions  for both  of  an  action  &  base  body  must  be  defined  via  EHD  Bearing  property  dialog.  EHD  Bearing solver calculates pressure pattern using these properties and applies force to the corresponding node ofsurfaces. The pressure pattern will be displayed in the postprocessor.

Soil Interaction
Soil Interaction function is available in the Linkstoolkit. A lot of tracked vehicles are operating not only under the hard ground but also the soft ground which usually called soil. Thoughthe Hertz contact  and  Coulomb  friction  approach  was  enough  to  represent  the  hard  ground,  they  were insufficient for the soft soil.Contact formulations of Bekker's normal pressure, Wong's shear stress, and Dynamic sinkageare used to represent the soft soil.
Soil Library
Properties of various soils are supported with the soil library file. Since the library is a text format file, you can modify and use the  revised  file  in  the  soil  modeler.  Parameters  of  normal pressure are taken from the reference of "Theory of Ground Vehicles (J.Y.Wong-3rd)" and the parameters of dynamics sinkage and shear stress have been defined empirically.
Road Data File (RDF)
Since the road can be modeled with the surface on soild or sheet geometry, various road shapes and obstacles can be considered in the driving simulation of the trakced or wheeled vehicle. The "Soil interaction" function generates the RDF file which is used to define the soil property and road shape.

Motor EM Force
In the  motorsystem, current around the  permanent  magnet between rotor and stator generates the electromagnetic force is  changed  byRPM  and  their  rotation  angle.Motor  EM  Force  function  can model  the  forceswhich  are appliedon the statorand  rotorbodiesin  the Drivetrain  toolkit. The force should be defined as the UNV file format and the file should contain the force vector and nodal position which are the results and geometry model of ANSYS Maxwell simulation.This function requires other additional data to describe a motor system simply and the more detail information about that is in the preprocessor manual.

Export a Modal body result
Modal  Flexible  body  has  been  widely  used  to reduce  acomplex flexibility  of  body intoa  small degree offreedom system and it gives highefficiency than the original model.Even  its  high  solving  efficiency,  expanding  usability  for  the  additional  simulation  such  as  sound pressure analysis using its surface velocity was limited due to huge output file size. A newapproachhas  been  proposedto  recover  the  kinematic  value.  Recovering  surface  velocity  or  acceleration  by using  modal coordinate and basic  kinematics results such as a position and its time  derivatives can be the more optimal way for that. The new version exports these necessary data into binary format in order  to  recover  nodal  position,  velocity,  and  acceleration  on  the  modal  flexible  body  for  FE  and EasyFlexbodies.

Convert High order element into Linear element
A function for eliminating mid nodes in the high order element to reduce its order to linear has been developed.  High  order  element  has  been  used  to  get  a  high  accuracy  solution.  In  the  case  of  the modal  flexible  body  which  usesthe  only  eigenvalue(frequency)  and  mode  shapes  for  the  solving process, it doesn't need to maintain the high order element.If this option turned on, all  mid nodes will be removed and the order transformed into linear. And the mode shape data only for thelinear element node will be read while generating a *.dfmf    file.More  small  size  *.dfmf  file  will  be  generated  if  the  option  used  while  keeps  a  highly  accurate solution  for  the  modal  flexible  body.  But  there  is  no  way  to  go  back  to  high  order  element  model without importing again.

Static Correction Mode for Rotational D.O.F.
In general, the unit displacements for the six d.o.f. are tested to get the static correction mode by the force  or joint connection. The resultant  modes improve the solution accuracy  of  the  modal  flexible body.However,  in some  case  that  torque  is  not  applied  such  as  motor  stator, it is  needlessto calculate  the  correction  modes  for  the rotational d.o.f. By  unchecking  the  option  of "Impose Rotational  Unit  Disp.", you  can  speed  up  the  body  eigenvalue  analysis  of  motor  stator  bodyby removing  the  calculation  of  the unnecessarystatic  correction  modes  associated with  therotational degree of freedom.The  option  is  available  for ANSYS  Motioneigenvalue  analysis  as  well  as  ANSYS  eigenvalue analysis for ANSYS Motioninterface.

Pyramid element
Lots of pyramid elementaregeneratedwhile automeshing in ANSYS. DAFUL had been imported it  after  separating  into  two  tetra  elements.  New  version  supports  a linear  type  of pyramid  element and import ANSYS one without transformation. A higher orderelementwill betransformedto linearorderif higher order pyramid elementis imported.   

        This chapter will introduce improvements of existing entities

Motion

Contact Stiction usability
Contact stiction algorithm has been improved. The stiction had correctly worked when the sliding distance  is  small  in  the  previous  version.But  the  new  version  gives  an  accurate  solution  for  the stiction problem after long sliding distance happened such as fastening &loosening a bolt too.
Restriction on Joint
The joint restriction function was only available when the joint has a motion. But no matter it has a motion  or  not, the function  works  correctly. Making a limitation  of  moving range  can be easily set even in a joint.
Contact force from GET_OBJECT_FORCE
The  contact  force  can  be measured from  theGET_OBJECT_FORCEfunctionwithin  an  user subroutine.Using a special keyword defined in the "defusub.h" located in the installation folder, each 6 directional force components can be obtained in every report time step.With this function, the contact  force  can  be  used  for  the  performance  index  in  the  DOE  as  well  as  other  optimization processors can easily get the contact force data by reading a *.out file.
Penalty Method of Hyperelastic Material for FE body.
The  formulation  for  the  Hyperelastic  Material  has  been  improved  and  availability  also  has been expanded to Solid15 and Solid 20 element. The improvement reduces a simulation time up to 40% while maintaining its accuracy within 1%.
Additiona loutputs for Flexible Body.
Contact  pressure  contour and  curve  areavailable  for  all  types  of  the  flexible  body  include EasyFlex one. Contour animation can be shown after choosing a "contact pressure" type. Resultant  nodal  forces  of C-load and P-loadare  displayed  on  the  animation  view  and theirsummation forces can be drawn as a graph on the Description view.

Improved functions of drivetrain

User input Rduction Raton for Power Flow.
Powerflow function had been not worked for several cases such as a planetary gear system because calculation of reduction ratio was impossible.Now,  manual  input  for  the  reduction  ratio  is  available  so  that  Assemble  manager  can  set  the output load as well as calculate transmission error.
Transmission Error ofPlanetary Gear
Transmission  Error  of Planetary  gear  has  developed  and  several  outputs  that  changed  depend on  a  input-output  combination  reported  at  the  same  time.
Gear Tolerance
Tolerance  tab  has  been  added  in the  gear  property  dialog.  More  detail  tooth  design has  been possible by changing the GPSC(Generating Profile Shift Coefficient).The GPSC is decided by usingone option among base tangent length, ball& pin diameters, tooth thickness tolerance, and backlash. approachor input the value directly. The parameter of GPSC has been widely used in the gear design application field,and lots of gear design software have usedthe same wayfor detail tooth design.   

ANSYS Motion    is a third-generation engineering solution based on an advanced multibody dynamics solver. It enables fast and accurate analysis of rigid and flexible bodies and gives accurate evaluation of physical events through the analysis of the mechanical system as a whole.

ANSYS Motion uses four tightly integrated solving schemes: rigid body, flexible body, modal and meshfree EasyFlex. This gives you unparalleled capabilities to analyze systems and mechanisms in any combination you want. Large assemblies with many millions of degrees of freedom can be studied with the effects of flexibility and contact included. Standard connections and joints then allow these systems to be connected and loaded.

In addition to the basic package, ANSYS Motion offers additional toolkits so users working in areas with specific multibody dynamic needs can work faster and more efficiently.

Story about ANSYS Motion on DEVELOP3D LIVE 2019

  ANSYS Inc. Founded in 1970,    ANSYS employs nearly 3,000 professionals, many of whom are expert M.S. and Ph.D.-level engineers in finite element analysis, computational fluid dynamics, electronics, semiconductors, embedded software and design optimization. Our exceptional staff is passionate about pushing the limits of world-class simulation technology so our customers can turn their design concepts into successful, innovative products faster and at                                                                                                                                                                                                          lower cost. As a measure of our success in attaining these goals, ANSYS has been recognized as one of the world's most innovative companies by prestigious publications such as Bloomberg Businessweek and FORTUNE magazines.

Product: ANSYS Motion
Version: 2019 R3
Supported Architectures: x64
Website Home Page :

Só visivel para registados e com resposta ao tópico.

Only visible to registered and with a reply to the topic.

Language: multilanguage
System Requirements: PC *
Supported Operating Systems: *
Size: 1.1 Gb

Download link:

Só visivel para registados e com resposta ao tópico.

Only visible to registered and with a reply to the topic.

Links are Interchangeable - No Password - Single Extraction