Development of Multi-Hit Nonlinear Progressive Collapse Models for Fixed Targets

Weidlinger Associates Inc. (WAI) proposes to develop a High Fidelity Physics Based (HFPB) Fast Running Model (FRM) to assess the potential for Progressive Collapse (PC) of aboveground fixed structures as a result of targeting by air-to-ground munitions. Both single and multi-hit targeting scenarios will be supported. This effort will produce a prototype PC assessment tool that may be incorporated into AFRL's MEVA (Modular Effectiveness Vulnerability Assessment) software environment in a later development phase. The availability of an HFPB FRM for PC assessment will facilitate the development of optimized targeting plans that minimize the potential for collateral damage. WAI's FLEX finite element software, extensively verified and validated for blast and progressive collapse applications, will be used to provide the HFPB component of this work. A theoretical approach first explored in the ProCAT FRM tool for progressive collapse will be adapted to meet MEVA's targeting requirements and structural modeling demands. The FRM developed in this effort will have a short run time and 80% statistical reliability