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2 FunctionBay, Inc.

Contents

What’s New in RecurDynTMV6.21……..………………….……….4

Existing Products….………………………………………………....4

RecurDynT M /SOLID…….……………………..……………………..7

RecurDynTM/SOLVER….…………………….……………………...8

RecurDynTM /F-FLEX………………..………………………..…….11

RecurDynTM/R-FLEX………..………………………………..…….14

RecurDynTM/BELT……..……………………..…………………….15

RecurDynTM/CHAIN……..………………………………………….16

RecurDynTM/TRACK_HM….......………………………………….17

RecurDynTM/TRACK_LM……………….………………………….18

RecurDynT M /MTT2D………………………………………………..19

RecurDynT M /MTT3D………….…………………………………….20

RecurDynT M /CRANK……………………………………………….22

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1 What’s New in RecurDynTMV6.21

Existing Products

RecurDynTM / Solid Upgrade Functions Performance upgrade for AVI file creation SubSystem marker display View operation customization Context menu for delete in Database Notice of the edit box where errors occur in dialog

Fixed Problems

RecurDynTM / Solver New Functions Cone in Cone Contact

Fixed Problems

RecurDynTM / F-Flex New Functions Node creation Using out of core option Reduce preprocessor time

Upgraded Functions Strain and stress recovery 2Gbyte file problem Shell thickness in contact Boundary condition

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Layer number of nodal flexible body Synchronize connector options

Fixed Problems Known Problems

RecurDynTM / R-Flex

Upgraded Functions Export of damping coefficients Reference node of Contour Position of CM RFI path RFI Interface for MSC.NASTRAN v2005

RecurDynTM / Belt Upgraded Functions Strain and stress recovery of Belt Shell

Fixed Problems

RecurDynTM / Chain New Functions Contact parameter for each geometry

Fixed Problems

RecurDynTM / TRACK_HM New Functions Contact parameter for each geometry

Fixed Problems

RecurDynTM / TRACK_LM New Functions Contact parameter for each geometry

RecurDynTM / MTT2D Fixed Problems

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RecurDynTM / MTT3D Upgraded Functions Damping characteristics of Sheet Shell Strain and stress recovery

Fixed Problems

RecurDynTM / Crank New Functions Step function in gas force

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2 RecurDynTM /SOLID

Upgraded Functions Performance upgrade for AVI file creation

The performance of AVI file creation was upgraded almost up to animation speed.

SubSystem Marker display The makers in SubSystem are displayed when shift button is pushed during creation, navigation operation etc.

View operation customization View operation can be customized with mouse button mixing.

Context menu for delete in Database Context menu for delete in Database was added.

Notice of the edit box where errors occur in dialog RD can notice the edit box where errors occur in dialog.

Fixed Problems

Fixed some minor bugs in Scope entity Fixed some minor bugs in D.O.E

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3 RecurDynTM/SOLVER

New Functions Cone in Cone Contact

When cone geometry is contacted in another cone geometry, this contact is available as shown in Figure 1. This contact can be applied to the valve-to-valve seat contact. The bottom and top faces of the base cone are opened.

Figure 1. Example of cone in cone contact

Fixed Problems

Fixed the bug that the friction force of Extended surface-to-surface contact has occasionally a peak when the static and dynamic threshold velocity is defined as very small value as shown in Figure 2. This is available when the advanced detection algorithm is checked. Resultant contact force can be different when a contacted body goes to a stiction range as shown in Figure 3.

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Figure 2. Example model of a stiction problem

Figure 3. Difference of a friction force

Figure 4. Example of an initial condition problem in Motion

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Figure 5. Example of an end condition problem in Motion

Fixed the bug that initial conditions are mismatched with user-specified values

when Motion is defined at a level of velocity or acceleration in IMGALPHA integrator. Refer the Figure 4.

Fixed the bug that a solution at the end time is a peak when Motion is defined at a level of acceleration and is a time function. Refer the Figure 4.

Fixed the bug that an initial acceleration of the constrained body with PTCV and CVCV is occasionally wrong.

Fixed the bug that the function of ERRMES has a wrong printing format in a user subroutine.

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4 RecurDynTM/F-FLEX

New Functions Node creation

You can create some necessary nodes. There are three types of creation rules such as a point, 2-points, 3-points. It can help you to generate master node for FDR Element.

Using out of core option Linear Solver can use file swap memory to solve huge D.O.F. problem with “Out Of Core” option. For huge D.O.F. “In Core” cannot handle the memory but “Out Of Core” can do it. “In Core” option uses only memory so it gives faster solution rather than “Out Of Core” option in small D.O.F. problem.

Reduce preprocess time Preprocess takes much time to save memory size used in the solver process. With unselect “Focus On Memory”, the preprocessing time will take less than previous versions.

Upgraded Functions Strain and stress recovery

Nodal strain and stress was always recovered from center of element. It assumed that all nodal strain and stress might be same with center value. This assumption was correct if you use a relatively fine meshed model. But a coarse mesh model will give an incorrect strain and stress solution especially in the stress concentrated nodes. To solve above problem, RecurDyn/F-Flex supports extrapolation method for strain and stress recovery using gauss point values.

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2Gbyte file problem RecurDyn/F-Flex had some limitation of output file size. There were some un-respectable problems whenever it exceeded 2Gbyte. This limitation is vanished.

Shell thickness in contact Flexible surface contacts can support the effect of thickness of finite element. Contact patch can use one of two types of thickness. The first original type is to consider the thickness of shell element, which is defined in property of shell element. The other is a specific type where a user-defined thickness is used.

Layer number of nodal flexible body The capability to set a layer number is added on the nodal flexible body dialog box.

Synchronize connector options In previous version, you have to change FDR connector option each by each. All FDR connector options can be grouping and synchronize them with same parameters.

Fixed Problems

Boundary condition Boundary condition always should be applied to the inertia reference frame. But this rule was broken when the orientation of node was changed. This problem is fixed.

Strain and stress in Beam Element Fixed the bug that program was terminated when the nodes included in beam element exist in output list.

Extracting with Solid26 Element Fixed the bug that program was terminated when the nodes included in beam element exist in output list.

Parametric value usage in connecting parameter Fixed the bug of converting error when connecting parameters are defined by parametric value.

Imposing boundary condition in FDR Element Node Fixed the bug that system became unstable when nodes that are imposed boundary conditions are belonging in FDR element.

Output of node in FDR Element

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Fixed the bug that output gives a garbage value when nodes belonging to FDR element are listed in output data.

Known Problems

Extracting after a modification of nodal position The strain calculated from deformation that means difference between current position and original position. This rule always applied after extracting preformed. But if you modify a node position before extracting, this changing cannot be considered as original position. So strain and stress may be different with your imagine.

Node which has no mass or inertia If a nodal body has no mass or inertia, small mass or inertia is added internally. It occurs when FDR element is connected to solid element or RBE element is connected to solid element. Additionally a node initially has no mass or inertia.

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5 RecurDynTM/R-FLEX

Upgraded Functions Export of damping coefficients

Damping coefficient can be exported.

Reference node of Contour Reference node can be used in deformation type of contour. The contour of the other nodes becomes displayed with respect to that of Reference node.

Position of CM Position of Center Marker indicates the correct position of mass center of the flexible body.

RFI path RFI file can be used in a different folder from the working folder. The RFI path is shown in Body property page of flexible body.

RFI Interface for MSC.NASTRAN v2005 New DMAP file(RecurDyn_rfi.alt) is supported for MSC.NASTRAN version 2005 so that an out file can be generated with this DMAP file. This out file can also be used to create RFI file in RFI interface.

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6 RecurDynTM/BELT

Upgraded Functions Strain and stress recovery

Nodal strain and stress was always recovered from center of element. It assumed that all nodal strain and stress might be same with center value. This assumption was correct if you use a relatively fine meshed model. But a coarse mesh model will give an incorrect strain and stress solution especially in the stress concentrated nodes. Extrapolation method using values at the gauss points is supported to solve above problem.

Fixed Problems Fixed the problem that shell belt systems didn’t normally work when a few shell

belt systems got together.

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7 RecurDynTM/CHAIN

New Functions Contact parameter for each geometry

Contact parameters can be defined at each geometric entity.

Fixed Problems

Fixed the bug that contact between sprocket teeth and silent chain is not performed in some case.

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8 RecurDynTM/TRACK_HM

New Functions Contact parameter for each geometry

Contact parameters can be defined at each geometric entity.

Fixed Problems

Fixed the bug that ‘full search’ function doesn’t work in contact between sprocket teeth and track link.

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9 RecurDynTM/TRACK_LM

New Functions Contact parameter for each geometry

Contact parameters can be defined at each geometric entity.

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10 RecurDynTM/MTT2D

Known Problems Fixed the bug that a simulation is failed when a sheet in sheet-to-sheet contact is

inactive. Fixed the bug that a program is terminated when sensors are selected

simultaneously and then their dialog boxes are opened.

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11 RecurDynTM/MTT3D

Upgraded Functions Damping characteristics of Sheet Shell

When a sheet shell is deformed in a diagonal direction, the damping characteristics are improved as shown in Figure 1.

Figure 1. Damping characteristics in a diagonal direction

Strain and stress recovery Nodal strain and stress was always recovered from center of element. It assumed that all nodal strain and stress might be same with center value. This assumption was correct if you use a relatively fine meshed model. But a coarse mesh model will give an incorrect strain and stress solution especially in the stress concentrated nodes. Extrapolation method using values at the gauss points is supported to solve above problem.

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Fixed Problems Fixed the bug that a contact force of Arc Guide has occasionally a wrong value. Fixed the bug that a sheet contact doesn’t occasionally work when a nodal

flexible body and Sheet Shell are modeled in the same subsystem. Fixed the bug that Boundary Condition is not applied to the inertia reference

frame.

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12 RecurDynTM/CRANK

New Functions Step function in gas force

Step function is supported in dialog box of gas force.

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Copyright 2006 FunctionBay, Inc. All rights reserved User and training documentation from FunctionBay, Inc. is subjected to the copyright laws of the Republic of Korea and other countries and is provided under a license agreement that restricts copying, disclosure, and use of such documentation. FunctionBay, Inc. hereby grants to the licensed user the right to make copies in printed from of this documentation if provided on software media, but only for internal/personal use and in accordance with the license agreement under which the applicable software is licensed. Any copy made shall include the FunctionBay, Inc. copyright notice and any other proprietary notice provided by FunctionBay, Inc. This documentation may not be disclosed, transferred, modified, or reduced to any form, including electronic media, or transmitted or made publicly available by any means without the prior written consent of FunctionBay, Inc. and no authorization is granted to make copies for such purpose. Information described herein is furnished for general information only, is subjected to change without notice, and should not be construed as a warranty or commitment by FunctionBay, Inc. FunctionBay, Inc. assumes no responsibility or liability for any errors or inaccuracies that may appear in this document. The software described in this document is provided under written license agreement, contains valuable trade secrets and proprietary information, and is protected by the copyright laws of the Republic of Korea and other countries. UNAUTHORIZED USE OF SOFTWARE OR ITS DOCUMENTATION CAN RESULT IN CIVIL DAMAGES AND CRIMINAL PROSECUTION. Registered Trademarks of FunctionBay, Inc. or Subsidiary RecurDyn™ is a registered trademark of FunctionBay, Inc.

RecurDyn™/Professional, RecurDyn™/Solver, RecurDyn™/Solid, RecurDyn™/F-Flex, RecurDyn™/R-Flex, RecurDyn™/Linear, RecurDyn™/Control, RecurDyn™/Driver, RecurDyn™/Tire, RecurDyn™/TRACK_HM, RecurDyn™/TRACK_LM, RecurDyn™/Chain, RecurDyn™/MTT2D, RecurDyn™/MTT3D, RecurDyn™/Belt, RecurDyn™/HAT, RecurDyn™/Gear, RecurDyn™/Bearing, RecurDyn™/Crank, RecurDyn™/Piston, RecurDyn™/MMS, RecurDyn™/EHD, RecurDyn™/Hydraulic are trademarks of FunctionBay, Inc.

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Third-Party Trademarks Windows and Windows NT are registered trademarks of Microsoft Corporation. ProENGINEER and ProMECHANICA are registered trademarks of PTC Corp. Unigraphics is a registered trademark of EDS Corp. I-DEAS is a registered trademark of SDRC. SolidWorks is a registered trademark of SolidWorks Corp. AutoCAD is a registered trademark of Autodesk, Inc. CADAM and CATIA are registered trademark of Dassault Systems. FLEXlm is a registered trademark of GLOBEtrotter Software, Inc. All other brand or product names are trademarks or registered trademarks of their respective holders. UNITED STATES GOVERNMENT RESTRICTED RIGHTS LEGEND This document and the software described herein are Commercial Computer Documentation and Software, pursuant to FAR 12.212(a)-(b) or DFARS 227.7202-1(a) and 227.7202-3(a), and are provided to the Government under a limited commercial license only. For procurements predating the above clauses, use, duplication, or disclosure by the Government is subjected to the restrictions set forth in subparagraph (c)(1)(ii) of the Rights in Technical Data and Computer Software Clause at DFARD 252.227-7013 or Commercial Computer Software-Restricted Rights at FAR 52.227-19, as applicable.

Edition Note This document describes the release information of RecurDyn™ V. 6.21