SOLICITATION NOTICE
70 -- CUSTOM SOFTWARE TO SIMULATE DYNAMICS OF A DAMAGED GEAR OR BEARING IN APLANETARY GEAR SYSTEM
- Notice Date
- 12/28/2009
- Notice Type
- Presolicitation
- NAICS
- 541330
— Engineering Services
- Contracting Office
- NASA/Glenn Research Center, 21000 Brookpark Road, Cleveland, OH 44135
- ZIP Code
- 44135
- Solicitation Number
- NNC10320194Q
- Response Due
- 1/7/2010
- Archive Date
- 12/28/2010
- Point of Contact
- Joan V Haug, Purchasing Agent, Phone 216-433-3503, Fax 216-433-2480, Email joan.v.haug@nasa.gov
- E-Mail Address
-
Joan V Haug
(joan.v.haug@nasa.gov)
- Small Business Set-Aside
- N/A
- Description
- The NASA Subsonic Rotary Wing Fundamental Aeronautics Program and the Army ResearchLaboratory Vehicle Technology Directorate have identified a need for a research tooldirected toward improved understanding of gear and bearing surface failure diagnostics inrotorcraft transmissions. More specifically the NASA and Army research team requires ananalytical tool capable of simulating, via appropriate software tool, the vibratorybehavior of gears and bearings having surface defects representative a fatigue spalls. This procurement seeks to obtain a user-friendly computing tool that will represent avirtual test capability for conducting fundamental analytical research for a widevariety of gear and bearing designs arranged as a planetary gear system. Presently the NASA and Army team conducts simulations of gear and bearing dynamics via amultibody dynamic contact analysis code Calyx from Advanced Numerical Solutions. Theexisting analysis tool package can simulate only undamaged gears and bearings whenanalyzing for dynamic behavior. The need is for an analysis tool or tools (softwaremodules) that can make use of existing models for planetary gear systems with anenhancement to modify the model via a user-friendly toolset to define a fault, conduct adynamic simulation, and then post-process the simulation results to summarized thedynamic gear and bearing forces and to also post-process the data to summarize the motion(vibration) at a point on the gear- or bearing- support structure where a vibrationsensor might be mounted for health monitoring.Detailed SOW:The government seeks to purchase a computer simulation tool (software) module or modulesthat can be executed on a personal computing (PC) platform. The intent of the softwaretool (the capability that will be enabled) is to simulate the effect of surface pitslocated on gears or bearings on the synamic behavior of planetary gear systes.Theapproach shall be a two-dimensional finite-element based approach. The software package(executable code, user manuals, and example model sets defining example-model inputs)shall have the following research capabilities and requirements. 1. The vendor shall develop the ability to describe a surface defect as a perturbationto a finite element model of a perfect (undamaged) gear tooth, rolling element, orbearing race. The analytical tool needs to able to specify one or more pits, onindividual teeth (or rollers).The profile of the surface defect must be described insufficient detail such that the providers contact solver will properly emulate thesurface profile for purposes of computing the contact force directions and separations. In other words, the influence of the surface defect on the computed contact vector forcemagnitude and direction must be calculated during the dynamic analysis. 2. The software module or modules for dynamic analysis models having a surface defectsshall incorporate a method to complete calculations until steady state is reached, thenstudy the frequency spectrum of reaction forces. 3. The software module or modules for bearing analysis must be capable of modelingcylindrical rolling element bearing with surface defects, with deformable (finiteelement) contact models incorporating the effect of contact between the rollers andraces. The races small be modeled as deformable. The inertial properties of the cageshould be included. The cage may be modeled as a rigid element. 4. The user shall be able to specify surface defects on individual teeth/rollers orspecific points on the bearing raceway. The user shall be able to specify differentdefects on individual teeth, raceway elements, or rollers. The underlying finite elementmodel must not be modified but the contact solver must model the defect geometry and theresulting change in the contact force vector. The defect specification should be capableof using data imported from a profilometer inspection of a real part. The user shallalso have the option to define a defect using parameters via a Graphical User Interface(GUI).5. The developer shall conduct example analyses to study the effects of surface defectson the races or rollers on the frequency spectrum of the bearing reaction forces. 6. The model definition for the gear must be 100% compatible with the gear softwareprogram CALYX-Planetery2D from Advanced Numerical Solution.The compatibilityrequirement will allow NASA and Army researchers to make use of the extensive database ofmodels already available and built up by the research team.7. The developer shall conduct example cases and document the contact solver resolutionsrequired such as to provide guidance for running analysis cases with appropriate contactsolver solutions.8. The user shall be able to save the analysis results in a file that can later bepost-processed using the including contact forces and contact pressure distributions,stress at any point in the FEA model as a function of time, stress as a function ofposition in the root-fillet region of the gear, and finite element model displacements. The post-processing capabilities and execution shall be presented to the user via aGraphical User Interface. The post-processed data shall be presented as X-Y plots orhistograms as appropriate in a manner that can be copied and pasted in the MicrosoftWindows environment (for example a graph shall be capable of being copied and pastedinto a Microsoft Word document) via a few keyboard keystrokes or mouse device clicks.9. The user shall be able to read the analysis results file and conduct post-processingof the results via the IGlass software tool.This tool allows to create color codedplots of finite element meshes, resultant stresses, and displacement distributions. Theresults in IGlass are depicted on the geometry representations of the gear and bearingmodels.The final deliverables of the purchase will be:1. Executable software code and license that will permit the software to operate on aPersonal Computer (PC)2. At least one example of a planetary gear system having a surface pit located on agear shall be provided in electronic format.3. At least one example of a planetary gear system having a surface pit located on abearing shall be provided in electronic format.4. The vendor shall provide a report that will serve as a user manual. Also the reportshall document example analysis cases results that will demonstrate that the softwaremeets the requirements of the SOW. Required by: Aug 10, 2010NASA/GRC intends to purchase the items from Advanced Numerical Solutions, 3956 Brown ParkDr., Hilliard, OH 43026. The GRC Mechanical Components Branch has access to the CALYX and IGlass software packageexecutables (permanent license) as a result of an Army SBIR project. The CALYX softwarepackage is currently not capable of analyzing a planetary gear system having pittingdamage. The need to do such an analysis has been defined in the Background section ofthe procurement SOW. A requirement of the SOW includes compatibilities with the CALYXand IGlass software modules that were developed via SBIR program. The softwarespecification to allow such compatibility is the exclusive proprietary rights of theAdvanced Numerical Solutions Company and is protected via the provisions of the SBIRprogram. The CALYX software package source code is required to accomplish the task asdefined, and only this contractor has access and control of the source code. Althoughone can imagine developing similar tools to those defined in the SOW for other generalpurpose finite element analysis tools, the cost for purchasing such a license and thetraining of GRC person to operate another software package would greatly exceed theexpected cost of this task. The Government intends to acquire a commercial item using FAR Part 12 and the SimplifiedAcquisition Procedures set forth in FAR Part 13. The Sole Source is under the authority of FAR reference 13.106-1(b)1. Interested organizations may submit their capabilities and qualifications to perform theeffort in writing to the identified point of contact not later than 4:30 p.m. local timeon January 5, 2010. Such capabilities/qualifications will be evaluated solely for thepurpose of determining whether or not to conduct this procurement on a competitive basis. A determination by the Government not to compete this proposed effort on a full and opencompetition basis, based upon responses to this notice, is solely within the discretionof the government.Oral communications are not acceptable in response to this notice.An Ombudsman has been appointed. See NASA Specific Note "B".Any referenced notes may be viewed at the following URLs linked below.
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