1-03_--_SOW_--_RFP_N00173-16-R-SE02_Unclassified.docx

DRAFT

)Solicitation Number: N00173-16-R-SE02 Attachment (1)

STATEMENT OF WORK (SOW)

LABORATORY AND AT SEA

ACOUSTIC TECHNIQUES

Version 0

03/30/2016

STATEMENT OF WORK (SOW)

LABORATORY AND AT SEA

ACOUSTIC TECHNIQUES

INTRODUCTION

1.1. BACKGROUND

The Physical Acoustics Branch at Naval Research Laboratory (NRL) carries out theoretical and experimental studies of acousto-elastic systems and parameters by means of physical techniques, and of physical systems and parameters by means of acousto-elastic techniques. The Branch’s main laboratory capability is on the Washington DC campus of NRL. The theoretical programs are carried out in acoustics, in acousto-elastic interactions and in structural acoustics. A primary area of focus is acousto-elastic scattering and radiation. In this regard techniques are utilized to model the elastic vibration of fluid-loaded structures and the resulting scattered and radiated fields. In particular there is an interest in modeling the response of complex structures of arbitrary geometry over a frequency range for which such modeling has not previously been possible. This entails the development of radically new approaches and formulations. Other topics currently of interest include: 1) inverse scattering, and optimization, and 2) image enhancement, detection, identification, and automated target recognition.

The experimental programs are carried out in a laboratory setting with a number of at-sea and field components involving technology demonstration objectives. The Government owned experimental facilities include large indoor water tanks and associated instrumentation and computer networks for acoustic studies. It also includes electronic and mechanical fabrication and design work spaces, clean rooms, and associated computer network computational capabilities. Regarding computational capabilities, access to national high performance computing capabilities are also employed. A large component of the work is carried out in two holographically-based acoustic pool facilities developed and operated by NRL, and its low temperature phonon-microstructure laboratory. Major focuses include structural acoustics of large scale, complex systems and the elasto-dynamics of micro-structures. The fundamental studies are complemented by more applied programs, which include programs on fiber-optic sensors, Micro Electro Mechanical Systems (MEMS) and Nano Electro Mechanical Systems (NEMS) sensing/processing, high-Q oscillators, target model studies, submarine acoustics, unmanned underwater vehicle acoustics (UUVs), seismic/acoustic intruder detection and detection of sea mine deployments, buried mine identification, Unexploded Ordnance (UXO) identification, Improvised Explosive Device (IED) detection, anechoic coating, acoustic visualization, and ship/aircraft interior acoustic noise reduction.

In carrying out the above programs, the Physical Acoustics Branch invents, develops, implements, and upgrades a number of acoustic measurement techniques and facilities. Examples include: the Branch’s new structural acoustics air facility and acoustic pool facilities with their associated robotic scanners, near field holography processing systems, and digital processing and display equipment; the Branch’s low temperature micro-structures laboratory; the Branch’s state-of-the-art scanning Lase Doppler Vibrometer (LDV) and Near-Field Scanning Optical Microscope (NSOM) capabilities; the Branch’s fiber optic/electro-optic sensor system laboratory; several unique at-sea measurements systems; and the Branch’s computer network servicing these various facilities.

1.2. SCOPE

This statement of work (SOW) defines the tasks, deliverables, and general goals for carrying out the programs for laboratory and at sea based acoustics techniques studies for the NRL in Washington, DC, (NRL-DC) in the areas described below:

1. Upgrades and improvements to acoustic laboratories and computer programs

2. Non-contact motion measurement techniques

3. Software development, testing, and demonstration

4. Measurement of acousto-elastic, acousto-magnetic, acousto-electric, and acousto-optic material properties

5. Testing of new formalisms

6. Data visualization techniques

7. Perform engineering efforts during scuba exercises

8. Micro-nano structures studies

9. High-order adaptive finite element algorithm and model development for large-scale applications

10. Properly instrumented UUV’s for acoustic studies

11. Technology transfer

12. Documentation and training

13. Geometry and mesh-generation for physics-based analyses and design

Efforts in support of the tasks delineated in Section 3, Requirements, below will be conducted in coordination with Principal Investigator (PI) led research teams that may include Government Scientists and Engineers, and other Contractors. Quality and timeliness of the provider’s contribution to the work will be evaluated in terms of its impact on the success of the overall project.

APPLICABLE DOCUMENTS

2.1. DEPARTMENT OF DEFENSE STANDARDS

- None

2.2. DEPARTMENT OF DEFENSE SPECIFICATIONS

-None

2.3. NON-GOVERNMENT STANDARDS AND OTHER PUBLICATIONS

- None

REQUIREMENTS (A004)

3.1. UPGRADES AND IMPROVEMENTS TO ACOUSTIC LABORATORIES AND COMPUTER PROGRAMS (A002, A003)

The Contractor shall design, develop, validate and implement upgrades and improvements to the acoustic laboratories and data processing programs in support of research and development (R&D) being performed for laboratory and at sea based acoustic techniques studies:

3.1.1. The Contractor shall develop and implement state-of-the-art robotic systems and measurement techniques compatible with NRL’s In-Air Structural Acoustics Laboratory, NRL’s major Near Field Holography Pool Facilities, its unique at-sea measurement systems that include unmanned underwater vehicle (UUV) based systems; and the Branch’s micro/nano structures mechanical dynamics laboratories. The work includes development of robotic scanner technology compatible with non-contact probes which extract acoustic pressure, in-plane and normal components of structure vibrations;

3.1.2. The Contractor shall measure underwater and in-air structural vibration fields;

3.1.3. The Contractor shall develop and implement improvements to conformal scan technologies, which include complex structural and solid geometries and those geometries that are not separable;

3.1.4. The Contractor shall implement scattering and radiation measurement techniques based upon development by NRL of conformal holographic sound reconstruction for complex geometries;

3.1.5. The Contractor shall implement data acquisition, signal processing and display systems for use in “at-sea” environments and

3.1.6. The Contractor shall implement data acquisition, signal processing and display systems for use to UUV and distributed autonomous systems based research efforts.

3.1.7. The Contractor shall implement data acquisition, signal processing and display systems for use to support ship/aircraft interior noise research efforts.

3.1.8. The Contractor shall develop and implement data acquisition, signal processing, and display systems for use in the nano-mechanics and low temperature high Q resonator laboratories.

3.2. NON-CONTACT MOTION MEASUREMENT TECHNIQUES (A002)

The Contractor shall employ suitable measurement techniques, in conducting experiments, generate processing and display software, and develop databases pursuant to investigating the use of non-contact motion measurements techniques in such disparate areas as the littoral ocean bottom itself and other complex physical systems such as micro-resonators and micro-voided polymers. The work to be performed under this task includes (a) employment of multi-axis LDV surface measurements; Magnetic Resonance Imaging (MRI) techniques to extract 3-D volumetric motions; and e-beam interferometry.

3.3. SOFTWARE DEVELOPMENT, TESTING, AND DEMONSTRATION (A002, A003)

The Contractor shall write software packages to address NRL’s specified calculations and test, demonstrate, and deliver with documentation these software packages to NRL for efficient numerical calculation on NRL specified hardware. The functions required from any software developed under this task include formation of numerical solutions based upon acoustic echo and radiation formation, structural acoustic formalisms, and models developed to describe the mechanical dynamics of high Q resonators developed by the Naval Research Laboratory.

3.4. MEASUREMENT OF ACOUSTO-ELASTIC, ACOUSTO-MAGNETIC, ACOUSTO-ELECTRIC, AND ACOUSTO-OPTIC MATERIAL PROPERTIES (A002)

The Contractor shall design and fabricate equipment in order to perform measurements of acousto-elastic, acousto-optic, acousto-electric, and acousto-magnetic properties in material systems. Work to be performed under this task includes (a) development of system software as required to reduce the data and provide meaningful displays of resulting behavior; (b) construction and calibration of special-purpose acoustic sources/actuators and sensors essential for these measurements; and (c) construction of special composite systems to analyze the limitations of the measurement procedures.

3.5. TESTING OF NEW FORMALISMS (A002)

The Contractor shall carry out studies to test new structural acoustic formalisms and associated techniques developed by NRL. Work to be performed under this task includes (a) testing of new formalisms and techniques for inverse acoustic processing and scattering/radiation problems, (b) application of the new NRL developed formalisms and techniques to various experimentally/numerically generated databases; and (c) application of the new NRL formalisms and techniques for modeling acoustic scattering and radiation from elastic structures in the mid-frequency region.

3.6. DATA VISUALIZATION TECHNIQUES (A002)

The Contractor shall apply existing experimental and numerical modeling capabilities to (a) develop data visualization techniques for observing results of underwater and in-air acoustic experiments and numerical models; and (b) develop post experiment analysis tools to assist in the validation of such data.

3.7. PERFORM ENGINEERING EFFORTS DURING SCUBA EXERCISES (A002)

The Contractor shall provide expert engineering-related scuba diving services. The work to be performed under this task includes diving exercises to install new equipment and modify existing apparatus in-water, such as attachment of new probes to in-water robots already deployed.

3.8. MICRO-NANO STRUCTURES STUDIES (A002)

The Contractor shall conduct NRL designed and specified studies in the area concerning the acoustic, ultrasonic, elastic, and vibratory response of micro and nano structures. This work will include both theoretical and experimental studies (some at Sub-Kelvin temperatures) of MEMS, NEMS, and nano-tubule systems. The work includes the following examples: the implementation of advanced sub-micron vibration probes based on nearfield optical fiber sensors; based on measurements made on the micro-nano structures, the testing of a physics based understanding of the mechanical dynamics of these micro and nanostructures including such things as the intrinsic vibratory dissipation mechanisms, mechanical energy coupling amongst the various components, and energy localization; and utilization of suitable approaches to obtain appropriate micro and nano structures for the experimental studies.

The Contractor shall also perform NRL specified measurements involving high frequency phonon propagation. Work to be performed under this task include (a) measurement involving high frequency phonon propagation in thin film and other microstructures; and (b) analysis of resulting measurement data to optimize microstructure pursuant to tailoring behavior of high frequency phonon mechanisms.

3.9. HIGH-ORDER ADAPTIVE FINITE ELEMENT ALGORITHM AND MODEL DEVELOPMENT FOR LARGE-SCALE APPLICATIONS (A002, A003)

The Theoretical Acoustics Section is in the process of developing and validating high-order adaptive techniques for radiation and scattering from targets in complex environments.

3.9.1. The Contractor shall develop and implement appropriate element formulations and carry out the validation of the model against experimental measurements for application scenarios of interest that involve scattering from complex targets in complex environments.

3.9.2. The Contractor shall develop and implement numerical solution algorithms suitable for ultra, large-scale numerical problems.

3.9.3. The Contractor shall develop solution algorithms, which can work in an accurate and scalable manner on the latest high-performance computing (HPC) platforms.

3.9.4. The Contractor shall complete all development in a manner that enables it to interface with existing modeling tools and capabilities.

3.10. PROPERLY INSTRUMENTED UUV’S FOR ACOUSTIC STUDIES (A002, A003)

The Contractor shall perform hardware and software engineering to support the creation of instrumentation for in-water instrumentation. In-water instrumentation may include unmanned underwater vehicles (UUV) used in acoustic Mine Counter Measures (MCM), counter UUV (CUUV), Harbor Protection. and Anti-Submarine Warfare (ASW) related research. As part of this effort, new low frequency environmental acoustic databases will be collected to enable NRL to analyze and characterize the propagation of acoustic energy in shallow water multi-path rich environments.

3.10.1. The Contractor shall design, build test, and install new low frequency sonar equipment required to demonstrate new NRL-developed concepts to include possible integration on UUVs.

3.10.2. The Contractor shall collect, retrieve, post process and analyze data taken on the vehicles at sea. This processing analysis involves the authoring of software to automate unique NRL-developed identification algorithms developed as part of NRL's ongoing research in this area.

3.11. TECHNOLOGY TRANSFER (A002, A003)

3.11.1. The contractor shall transfer all techniques and methodologies developed under the contract to NRL with documentation progressively throughout the course of the contract.

3.11.2. The Contractor shall conduct seminars and technical meetings for NRL personnel to expedite the transfer of information to NRL employees.

3.11.3. The Contractor shall provide frequent demonstrations of software under development.

3.11.4. The Contractor shall provide equipment necessary for this technology transfer, including visual aid equipment, work stations, and word processing hardware and software.

3.12. DOCUMENTATION AND TRAINING (A002)

The Contractor shall provide documentation and training for all software and hardware developed under this contract.

3.13. GEOMETRY AND MESH-GENERATION FOR PHYSICS-BASED ANALYSES AND DESIGN (A002, A003)

The Theoretical and Computational Acoustics Section is developing a computational platform to support the representation of geometry and mesh information needed for complex physics-based computational analyses for fluid-dynamics, structural analyses and acoustic and electromagnetic radiation and scattering.

3.13.1. The Contractor shall develop and implement algorithms for generating analysis-appropriate geometry and producing high-quality meshes.

3.13.2. The Contractor shall develop approaches to repair and clean geometry that may be invalid or not suitable for an intended analysis.

3.13.3. The Contractor shall also identify and develop effective geometric modeling and mesh generation approaches that are effective for all stages of the design of major defense platforms spanning conceptual design to operational assessment and retrofits.

SPECIAL REQUIREMENTS

4.1. SECURITY

All contractor personnel with access to unclassified information systems, including e-mail, require at a minimum a favorable National Agency Check (NAC).

APPENDIX –ACRONYM LIST