INM_Basics_sp08

INM_Basics_sp08 - INM - Integrated Noise Model Basics CEE...

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Copyright - A.A. Trani INM - Integrated Noise Model Basics CEE 4674 - Airport Planning and Design Dr. Antonio A. Trani Associate Professor of Civil Engineering Virginia Tech
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Copyright - A.A. Trani 2 of 44 Basics on INM Developed by FAA Office of Energy and Environment and EPA The initial versions of INM was developed in FORTRAN and ported to the PC in 1982 Newest version is 7.0 (runs on Windows XP or Vista OS) The model includes a good database (101 aircraft currently) to analyze civilian airports A similar model has been developed by the human factors group at Wright Patterson AFB to predict noise contours around military bases (NOISEMAP 6.1)
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Copyright - A.A. Trani 3 of 44 Justification for INM After 1969 every transportation project (including airport upgrades and plans) require a detailed environmental study The only way to convey information to communities around an airport is to compute potential noise levels before constructing a facility Noise prediction is a tedious process for real airports as there are too many aircraft and tracks that need to be analyzed in determining the noise at a point on the ground
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Copyright - A.A. Trani 4 of 44 Inputs to INM Airport characteristics (runways, orientation, etc.) Approach and departure profiles + Procedural (aerodynamic based profiles) + Fixed point profiles Flight tracks + Approach + Departure + Touch-and-go + Circling + Overflights
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Copyright - A.A. Trani 5 of 44 Inputs to INM Flight operations + Numbers of aircraft assigned to each track + Percent aircraft assigned to each track + Runup operations (engine test operations) Noise Metric + Select among DNL, CNEL, NEF, TNEL, and 12 others.
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Copyright - A.A. Trani 6 of 44 INM Output Noise contours (contours of equal values of a noise metric like DNL) Complex metric population point calculations (i.e. DNL level at a specific city block) Population living within a given complex noise metric (i.e., how many people live within DNL 55 contour)
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Copyright - A.A. Trani 7 of 44 Detailed Procedures for INM 1) Open a New Case Study from the File menu 2) Select the airport in question in the Setup Window 3) Verify all runway data (including altitudes and displaced thresholds) 4) Go to the Aircraft Window to select all the aircraft to be modeled in your case study 5) Apply aircraft substitutions as needed 6) Select the noise metric to be used in the computational procedure (from Setup - Metrics menu)
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Copyright - A.A. Trani 8 of 44
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This note was uploaded on 01/07/2012 for the course CEE 4674 taught by Professor Staff during the Fall '11 term at Virginia Tech.

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INM_Basics_sp08 - INM - Integrated Noise Model Basics CEE...

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