NASA/Langley Research Center, Mail Stop 144, Industry Assistance Office, Hampton, VA 23681-0001

70 -- COMPUTER CODE FOR FLUTTER ANALYSIS AND SENSITIVITY ANALYSIS SOL SS298 DUE 013199 POC Linda P. Fitzgerald, Procurement Analyst, Phone (757)-864-2461, Fax (757) 864-7898, Email L.P.FITZGERALD@larc.nasa.gov WEB: Click here for the latest information about this notice, http://nais.nasa.gov/EPS/LaRC/date.html#SS298. E-MAIL: Linda P. Fitzgerald, L.P.FITZGERALD@larc.nasa.gov. NASA/LaRC is hereby soliciting information for potential sources for a commercial-grade computer code for dynamic aeroelastic (flutter) analysis and parametric sensitivity analysis with the future objective of providing additional functionality into the Multidisciplinary Optimization Software development project HSCT4.0. The requirements for this code are as stated in below. Technical Requirements -- The computer program is to perform rapid analysis of dynamic aeroelastic instability, also known as flutter, and associated parametric sensitivity analysis, for full aircraft configurations including wing, fuselage, tail, engine mount and attachments. This program will be used in situations requiring large numbers of flutter analyses in multidisciplinary preliminary design and optimization studies. Accurate generalized aerodynamic force calculations must be available for both the subsonic and supersonic flight regimes, with panel discretization sufficient to model complete airplane configurations. A modal superposition approach is to be used to represent the structural elastic response and the program must accept at least fifty to one hundred modes. Efficient methodology for solution of the complex flutter equations must be available, and should include other commonly used methods (e.g p-k solution). Analytical or semi-analytical parametric sensitivity derivatives must be available with respect to selected input parameters, including, but not limited to structural and aerodynamic parameters. Finally, some flutter mode tracking capability must be included to follow modes during design and optimization studies where changes to the design cause active flutter modes to change. Software Requirements -- The computer program should be in modular form suitable for providing possible future functionality into the software development project MDO HSCT4.0. This software project uses standard object oriented architecture for native and object code wrapping, for distributed heterogeneous computer workstation computation and execution. The Database uses local client based mini-SQL. The flutter analysis code is intended to be used in preliminary design or optimization studies where multiple twenty or more flight conditions must be investigated. For example, it should be able to take advantage of the latest developments in parallel and distributed computing and a suitable database architecture to process gegabytes of data. Coarse-grained parallelization approach for improving code computational efficiency may be considered at present. The flutter analysis code execution must be automatic, freeing the user from repeated hands-on operations, particularly once a detailed flutter analysis and sensitivity analysis has been performed for the baseline configuration. The code must be modular and the user must be able, with a minimum amount of interfacing to replace key modules (like generalized aerodynamic force calculations or modal interpolations) with their own modules. Data visualization is required, to display Velocity-structural damping (V-g) diagrams and flutter modes, among others. In general, the code must follow up-to-date IEEE standard code design and implementation practices and shall include complete user manual and programmer documentation. No solicitation exists; therefore, do not request a copy of the solicitation. If a solicitation is released it will be synopsized in the CBD and on the NASA Acquisition Internet Service. It is the potential offerors responsibility to monitor these cites for the release of any solicitation or synopsis. If your company has a computer code which meets NASA's requirements or could be modified to meet NASA's requirements, please respond to this notice and provide the following information: 1) A complete description of the features and capabilities of your code. 2) The cost of licensing your code. 3) The extent to which the code meets NASA's desired requirements as stated above. 4) The extent, cost, and feasibility of modifications which would be required to your code in order to meet NASA'srequirements. 5) Whether your code has been sold, leased, or licensed to the general public or whether it has been used exclusively by the Government. 6) Name and address of firm, size of business; average annual revenue for past 3 years and number of employees; ownership; whether they are large, small, small disadvantaged, 8 (a), and or woman owned. 7) List of customers listing point of contact, address and phone numbers. Technical questions should be directed to: Vivek Mukhopadhyay at 757-864-2835 (FAX: 757-864-9713) or e-mail: v.mukhopadhyay@larc.nasa.gov. Please advise if the requirement is considered to be a commercial or commercial-type product. A commercial item is defined in Internet "Note A". [INTERNET ONLY (commercial product definition)] This synopsis is for information and planning purposes and is not to be construed as a commitment by the Government nor will the Government pay for information solicited. Respondents will not be notified of the results of the evaluation. Respondents deemed fully qualified will be considered in any resultant solicitation for the requirement. The Standard Industrial Classification (SIC) code for this procurement is 7371 with a size standard of $18.0 million. The Government reserves the right to consider a small business or 8(a) set-aside based on responses hereto. All responses shall be submitted to NASA Langley Research Center, Industry Assistance Office, Mail Stop 144, Hampton, VA 23681 no later than January 31, 1999. In responding reference SS298. Any referenced notes can be viewed at the following URL: http://genesis.gsfc.nasa.gov/nasanote.html. Posted 12/01/98 (D-SN275661). (0335)

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