R&D PROJECTS

We have developed numerous innovative solutions for complex engineering problems over the years. Many of these projects have been performed in collaboration with leading academic researchers and are sponsored by US government agencies. Some of these projects are highlighted in this section.

Leak Detection in International Space Station Module

Sponsor:
NASA Langley Research Center

The project initially consisted of calibrating the vibroacoustic model of the International Space Station (ISS) by correlating experimental data, measured by NASA LaRC at specific sensor locations on a module of ISS, with numerical data, predicted using our high frequency energy flow analysis (EFA) software, Comet EnFlowTM.

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Sub-Structured, Meshless and Parametric Modeling of Vibroacoustic Systems

Sponsor:
NASA Langley Research Center

Collaborator:
Wayne State University

Aerospace structures are often subjected to a broad spectrum of mechanical and/or aerodynamic excitations and, therefore, there is a need to develop techniques that is applicable for the resolution of vibroacoustic systems over the entire frequency spectrum.

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Failure Initiation Predictors for Reliability-Based Design of Hybrid Composite Materials

Sponsor:
Air Force Office of Scientific Research

Collaborator:
The University of Michigan

This project is concerned with the development of a novel failure initiation and progressive failure analysis (PFA) modeling method for advanced composite structures, utilizing a fundamental physics based multiscale mechanics model.

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Hybrid Element Method for Mid-Frequency Analysis of Composite Structures Subjected to Boundary Layer Loading

Sponsor:
NASA Langley Research Center

Collaborator:
Calvin College

In many situations, aerospace structures are subjected to a wide frequency spectrum of mechanical and/or acoustic excitations and therefore, there is a need for the development of numerical modeling techniques that are applicable for the resolution of dynamic response of complex systems spanning the entire frequency spectrum.

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Identification and Reduction of Turbomachinery Noise

Sponsor:
NASA Glenn Research Center

Collaborators:
Michigan State University
Purdue University

Propulsion noise is a major contributor to the overall noise level near airports due to low flying aircraft in the takeoff or landing phase of flight.

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Hybrid Element Method for Mid-Frequency Vibroacoustic Analysis

Sponsor:
NASA Langley Research Center

Collaborator:
Calvin College

An innovative, accurate and efficient Hybrid Element Method (HEM) is developed for mid frequency vibroacoustic analysis of non-uniform aerospace structures including metallic/composite configurations.

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Vehicle Noise Predictions Using Energy Finite Element Analysis

Sponsor:
NASA Langley Research Center

Collaborator:
Purdue University

The project is directed towards the development and validation of a numerical technique based on Energy Flow Analysis (EFA) for the analysis of high frequency vibroacoustic problems.

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Boundary and Finite Element Models for the Application of Nearfield Acoustical Holography

Sponsor:
NASA Langley Research Center

Collaborators:
Office of Naval Research
Purdue University

Evaluation of noise sources is difficult when there are multiple sources and the interaction among them is complex.

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Development of a Finite Element Model for Passive and Active Noise Control Design Procedures

Sponsor:
NASA Langley Research Center

Collaborators:
Purdue University

Methods are developed to analyze and optimize sound in elastic-porous (e.g., foam), solid and fluid domains.

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