Structural Dynamic Modeling Tool for Virtual Vibration Testing Of External Stores Navy SBIR FY2010.1 Sol No.: Navy SBIR FY2010.1 Topic No.: N101-015 Topic Title: Structural Dynamic Modeling Tool for Virtual Vibration Testing Of External Stores Proposal No.: N101-015-0872 Firm: ACTA Incorporated 2790 Skypark Drive, Suite 310 Torrance, California 90505 Contact: Timothy Hasselman Phone: (310) 530-1008 Web Site: www.actainc.com Abstract: ACTA proposes a SBIR Phase I project to develop an accurate structural dynamic modeling tool for virtual vibration testing of external stores. The goal is to develop a structural dynamics modeling tool which will provide an accurate physics-based solution for predicting non-linear vibration response, and employ the modeling tool for conducting "virtual" vibration testing. This requires a thorough understanding of the relevant physics, the critical technical issues involved, and the resources available to model the physics and address these issues. The proposed technical approach will (1) enable analysis of laboratory test configuration(s) for comparison with "real world" store/aircraft systems and their dynamic environments, (2) facilitate the "tuning" of laboratory test configurations to more accurately represent the physics and service environments of "real world" store/aircraft systems, and (3) enable the "virtual vibration testing" of external stores that have received minor modifications relative to stores that previously have undergone successful vibration testing in the laboratory. Benefits: The proposed structural dynamic modeling tool for virtual vibration testing of external stores will enable the Navy to more accurately simulate flight loads in the test laboratory, thereby avoiding unintended over-testing, and for those stores that have undergone minor modifications relative to stores that have previously undergone successful vibration testing, replace any additional laboratory testing of the modified stores with "virtual testing" based on analysis with the new structural dynamics modeling tool. Potential commercial applications include improvement to all laboratory shock and vibration (S&V) testing procedures intended to simulate in-service environments, especially where test articles exhibit strong isolated nonlinearities. Most S&V testing, including test specification, testing itself and the interpretation of test results is based on linear theory. Methodologies that allow for the treatment of nonlinearities in certain components will advance the state of the art, and benefit commercial suppliers of test equipment as well as their customers. Return