DOD STTR 24.B Annual

Active
No
Status
Open
Release Date
April 17th, 2024
Open Date
May 15th, 2024
Due Date(s)
June 12th, 2024
Close Date
June 12th, 2024
Topic No.
A24B-T008

Topic

Modeling Tools for Army Vehicle (tanks and rotorcraft) Mobility Applications

Agency

Department of DefenseN/A

Program

Type: STTRPhase: Phase IYear: 2024

Summary

The Department of Defense (DOD) is seeking proposals for the Small Business Innovation Research (SBIR) Phase I program. The specific topic of the solicitation is "Modeling Tools for Army Vehicle (tanks and rotorcraft) Mobility Applications". The objective of this topic is to incorporate new mathematical constructs and high-fidelity design tools to predict fluid-structure interactions of Army vehicles. The United States Army has a critical need to understand and optimize flight characteristics across various mobility applications, including gas-turbine engine flow and heat transfer analysis. The Army is looking to develop high-fidelity, computationally efficient solvers for the aerodynamic analysis and design of vehicles ranging from rotary-wing aircraft to medium/long-range hypersonic projectiles. The Phase I effort will assess effective unstructured IGA discretization and mesh refinement tools, advanced IGA mesh moving tools, tools for fluid mechanics and FSI simulations, and visualization tools. The Phase II effort will focus on developing the mid-processing tools identified in Phase I. The Phase III dual-use applications involve collaborating with model and software developers to integrate the products into a Long-Range Precision Fires application and optimizing the toolset for high-speed weapons in anti-access/area-denial environments. The technology will be transitioned to an appropriate government agency or prime defense contractor for integration and testing. The solicitation is open until June 12, 2024. For more information, visit the SBIR topic link or the solicitation agency website.

Description

OUSD (R&E) CRITICAL TECHNOLOGY AREA(S): Trusted AI and Autonomy, Hypersonics

 

The technology within this topic is restricted under the International Traffic in Arms Regulation (ITAR), 22 CFR Parts 120-130, which controls the export and import of defense-related material and services, including export of sensitive technical data, or the Export Administration Regulation (EAR), 15 CFR Parts 730-774, which controls dual use items. Offerors must disclose any proposed use of foreign nationals (FNs), their country(ies) of origin, the type of visa or work permit possessed, and the statement of work (SOW) tasks intended for accomplishment by the FN(s) in accordance with the Announcement. Offerors are advised foreign nationals proposed to perform on this topic may be restricted due to the technical data under US Export Control Laws.

OBJECTIVE: To incorporate new mathematical constructs and high-fidelity design tools to predict Fluid-Structure interactions of Army vehicle (tanks and rotorcraft)

 

DESCRIPTION: The United States Army is actively seeking to advance its capabilities in aerodynamic analysis and design for a wide range of vehicles spanning from rotary-wing aircraft to medium/long-range hypersonic projectiles. A critical need to understand and optimize flight characteristics across various mobility applications is behind this initiative.  The United States Army has a need to develop high-fidelity, computationally efficient solvers for the aerodynamic analysis and design of vehicles ranging from rotary-wing aircrafts to medium/long-range hypersonic projectiles. The Army has unique gaps in understanding the flight characteristics (e.g., mobility applications, including gas-turbine engine flow and heat transfer analysis for vehicles that include these propulsion systems) and Extreme-event mitigation including air-blast FSI modeling and simulation for Army vehicles and structures.  Isogeometric Analysis (IGA) has brought superior accuracy to spatial and temporal discretization in fluid and structural mechanics simulations. Complex-geometry NURBS mesh (Non-Uniform Rational B-Spline Surfaces) generation tools developed in recent years are making IGA simulations more applicable to real-world problems in fluids, structures, and fluid–structure interaction (FSI) and thus more practical and widespread. Bringing even higher fidelity and higher efficiency to IGA FSI simulations will require mid-processing tools. The mid-processing tools should include those listed below. i) More effective unstructured IGA discretization and mesh refinement tools, such as T-splines, subdivision, and locally refined B-splines. Correct prediction of hypersonic boundary layer transition locations, turbulent heat fluxes and vortical structures of high-speed wakes are of paramount importance in enabling the prediction of a next generation hypersonic vehicle’s performance.

 

In conclusion, enhancing the fidelity and efficiency of IGA FSI simulations represents a critical competency that provides the United States Army with advanced aerodynamic analysis and design capabilities.

 

PHASE I: The Phase 1 effort shall carefully assess the i) More effective unstructured IGA discretization and mesh refinement tools, such as T-splines, subdivision, and locally refined B-splines.

ii) Advanced IGA mesh moving tools, such as the method based on fiber-reinforced hyper elasticity, that significantly increase the scope and accuracy of the IGA FSI computations with body-fitted methods.

iii) Tools that will make it simpler in fluid mechanics and FSI simulations carried out with the Variational Multiscale (VMS) method to use more sophisticated and better-performing stabilization parameters, such as those targeting IGA discretization. These parameters play a key role in the stability and accuracy of VMS computations.

iv) Visualization tools that will give the users a better understanding of the performance of the IGA computational methods they are using and help them steer the simulations to even higher fidelity.

 

One of the Phase 1 outcomes will be outline of Phase 2 schedule for implementation of Advanced IGA mesh moving tools. Another outcome will be a report summarizing the assessments, a plan to move forward, an estimate of the increased fidelity possible through i-iv, or a recommendation for a prioritization of which tools would be most likely to significantly enhance design tools.

 

PHASE II: In Phase II the mid-processing tools itemized below will be developed.

Advanced IGA mesh moving tools, such as the method based on fiber-reinforced hyper elasticity, that significantly increase the scope and accuracy of the IGA FSI computations with body-fitted methods.
Tools that will make it simpler in FSI simulations carried out with the Variational Multiscale (VMS) method to use more sophisticated and better-performing stabilization parameters, such as those targeting IGA discretization. These parameters play a key role in the stability and accuracy of the VMS computations.
Visualization tools that will give the users a better understanding of the performance of the IGA computational methods they are using and help them steer the simulations to even higher fidelity.

 

PHASE III DUAL USE APPLICATIONS: Collaborate with model, software developers, and users on integration of products into a Long-Range Precision Fires application.  Optimize toolset to accommodate new advances in the technology delivering high-speed weapons in anti-access/area-denial environments.  Transition the technology to an appropriate government agency or prime defense contractor for integration and testing.  Integrate and validate the functional aerothermodynamic tools into a real-world development or acquisition program.

 

REFERENCES:

T.J.R. Hughes, J.A. Cottrell, and Y. Bazilevs,“Isogeometric analysis: CAD, finite elements, NURBS, exact geometry, and mesh refinement”, Computer Methods in Applied Mechanics and Engineering, 194 (2005) 4135-4195.; 
Y. Otoguro, K. Takizawa, and T.E. Tezduyar, “Space–time VMS computational flow analysis with isogeometric discretization and a general-purpose NURBS mesh generation method”, Computers & Fluids, 158 (2017) 189-200.; 
T.E. Tezduyar, K. Takizawa, and Y. Bazilevs, “Isogeometric analysis in computation of complex-geometry flow problems with moving boundaries and interfaces”, Mathematical Models and Methods in Applied Sciences, to appear (2023).; 
E. Wobbes, Y. Bazilevs, T. Kuraishi, Y. Otoguro, K. Takizawa, and T.E. Tezduyar, “Advanced IGA mesh generation and application to structural vibrations”, to appear as a chapter in Frontiers in Computational Fluid-Structure Interaction and Flow Simulation: Research from Lead Investigators under Forty – 2023, Modeling and Simulation in Science, Engineering and Technology, Springer (2023).; 
T. Kuraishi, Z. Xu, K. Takizawa, T.E. Tezduyar, and S. Yamasaki, “High-resolution multi-domain space-time isogeometric analysis of car and tire aerodynamics with road contact and tire deformation and rotation”, Computational Mechanics, 70 (2022) 1257-1279.; 
Y. Bazilevs, V.M. Calo, J.A. Cottrell, J. Evans, T.J.R. Hughes, S. Lipton, M.A. Scott, and T.W. Sederberg, “Isogeometric analysis using T-splines,” Computer Methods in Applied Mechanics and Engineering, 199 (2010) 229-263.; 
F. Cirak, M.J. Scott, E.K. Antonsson, M. Ortiz, and P. Schröder, “Integrated modeling, finite-element analysis, and engineering design for thin-shell structures using subdivision”, Computer Aided Design, 34 (2002) 137-148.; 
K.A. Johannessen, T. Kvamsdal, and T. Dokken, “Isogeometric analysis using LR B-splines”, Computer Methods in Applied Mechanics and Engineering, 269 (2014) 471-514.; 
K. Takizawa, T.E. Tezduyar, and R. Avsar, “A low-distortion mesh moving method based on fiber-reinforced hyperelasticity and optimized zero-stress state”, Computational Mechanics, 65 (2020) 1567-1591.; 
Y. Otoguro, K. Takizawa, and T.E. Tezduyar, “Element length calculation in B-spline meshes for complex geometries”, Computational Mechanics, 65 (2020) 1085-1103.

 

KEYWORDS: Fluid-Structure interactions, hyperelasticity, modeling, design, tools, air vehicles

Similar Opportunities

DOD SBIR 24.4 Annual - Artificial Intelligence/ Machine Learning (AI/ML) Focused Open Topic
Department of Defense
The Department of Defense (DOD) is seeking proposals for an Artificial Intelligence/Machine Learning (AI/ML) Focused Open Topic. The purpose of this open topic is to bring potentially valuable small business innovations to the Army and expand the relevance of the Army SBIR program to firms who do not normally compete for SBIR awards. The topic accepts both Phase I and Direct to Phase II submissions. Phase I proposals are accepted for a cost up to $250,000 for a 6-month period of performance, while Direct to Phase II proposals are accepted for a cost up to $2,000,000 for a 24-month period of performance. The research areas of focus include synthetic data generation, data validation and verification, AI risk mitigation, large language models, retrieval augmented generation, and collaborative AI technologies. Phase I submissions require a 5-page technical volume, an 8-slide commercialization plan, and a statement of work outlining deliverables. Phase II submissions require a 10-page technical volume, a 5-page feasibility documentation, an 8-slide commercialization plan, and a statement of work. During Phase II, firms must produce prototype solutions that are practical and feasible to operate in edge and austere environments. Phase III focuses on the maturation of the technology to TRL 6/7 and the production of prototypes to support further development and commercialization. The Army will evaluate each product in a realistic field environment and provide solutions to stakeholders for further evaluation. The submission deadline is March 31, 2025. For more information, visit the [solicitation link](https://www.sbir.gov/node/2651299).