POWER PLANT ACOUSTICS Episode 4 potx

... building with the engine (or in a nearby building); and pow- er plant noise is disturbing to residential neighbors living near the plant. Noise control is directed to- ward meeting and solving ... the isolated assembly. — 3-14 ARMY TM 5-805-9 AIR FORCE AFM 88-20 NAVY NAVFAC DM-3.14 POWER PLANT ACOUSTICS DEPARTMENTS OF THE ARMY, THE AIR FORCE, AND THE NAVY DECEMBER 1983 duct mufflers...

Ngày tải lên: 13/02/2014, 23:20

... C-1 Page 1-1 1-1 1-1 1-2 2-1 2-1 2-2 2-2 2-2 2-3 2-3 2-8 2–13 2-13 3-1 3-2 3-3 3-4 3-12 3-12 3-15 3-15 3-15 3-16 3-16 4-1 4-1 4-43 4-52 i UFC 3-450-02 15 May 2003 UNIFIED FACILITIES CRITERIA (UFC) POWER PLANT ACOUSTICS APPROVED FOR ... radiated sound power the total PWL minus the table 3–1 values. is then out the flow...

Ngày tải lên: 27/06/2014, 23:20

... entersfleaves the system per unit of time) as a function of the buffer size b. Further Reading One of the first books on Monte Carlo simulation is by Hammersley and Handscomb [3]. Kalos and Whitlock ... Handscomb. Monte Carlo Methods. John Wiley & Sons, New 4. M. H. Kalos and P. A. Whitlock. Monte Carlo Methods, Volume I: Basics. John Wiley &...

Ngày tải lên: 12/08/2014, 07:22

... 50.8 0. 04 1.80 29.8–1, 342 .3 16 40 .6 0.08–2.97 59.7–2,2 14. 7 12 30.5 0.22–5.87 1 64. 1 4, 377.3 10 25 .4 0.378.29 275.96,181.9 8 20.3 0.6611.71 49 2.28,732.1 0 .49 9.07 365 .46 ,763.5 6 15.2 Đ 1 .44 19.15 ... 0. 04 0.37 0.030–0.276 12 30.5 0. 14 2.96 0.1 04 2.207 0.07–1.77 0.052–1.320 10 25 .4 0.39–3 .47 0.291–2.588 0.23–2.07 0.172–1. 544 Steel and cast-iron bevel gears Ratio hp W...

Ngày tải lên: 12/08/2014, 07:22

... Instructor-lead discussions. C. Student-centered Discussions. 118 CHAPTER 7: NONTECHNOLOGICAL ALTERNATIVES TO LECTURES Teaching Engineering - Wankat & Oreovicz methods are one of the appropriate teaching ... Conducting Discussions 1 14 CHAPTER 7: NONTECHNOLOGICAL ALTERNATIVES TO LECTURES Teaching Engineering - Wankat & Oreovicz CHAPTER 7 NONTECHNOLOGICAL A...

Ngày tải lên: 12/08/2014, 08:22

... 4- 2 UFC 3 -41 0-04N 25 October 20 04 Figure 4- 4. MK -46 workbench hood. Figure 4- 5. MK -46 parts washer hood. 4- 4 UFC 3 -41 0-04N 25 October 20 04 c. Install an automatic ... floor. 4- 9 UFC 3 -41 0-04N 25 October 20 04 Figure 4- 1. Layout for the MK -46 fuel/defuel and afterbody breakdown room. Figure 4- 2. Series of hood in the...

Ngày tải lên: 12/08/2014, 16:20

... C -1 Page 1- 1 1- 1 1- 1 1- 2 2 -1 2 -1 2-2 2-2 2-2 2-3 2-3 2-8 2 13 2 -13 3 -1 3-2 3-3 3-4 3 -12 3 -12 3 -15 3 -15 3 -15 3 -16 3 -16 4 -1 4 -1 4-43 4-52 i ARMY TM 5-805-9 AIR FORCE AFM 88-20 NAVY NAVFAC DM-3 .14 POWER ... by \1\ /1/ ) Change No. Date Location This UFC supersedes TM 5-805-9, dated 30 December 19 83. The format o...

Ngày tải lên: 12/08/2014, 16:21

... 3–8 of this manual. 2- 5. Indoor sound distribution. Sound from an indoor sound source spreads around 2- 2 TM 5–805-9/AFM 88 20 1NAVFAC DM–3.14 CHAPTER 2 SOUND ANALYSIS PROCEDURE 2- 1. Contents of ... source. 2- 1 Octave-band PWLs can be obtained by subtracting rections are different for the different engine speed the table 2 2 values from the overall PWL given groups. by table 2 l...

Ngày tải lên: 12/08/2014, 16:21

... is (from eq. 7-18 in the N&V manual) (3- 2) where A is the area of the radiating wall, in ft. 2 Equation 3 3 combines equations 3 1 and 3- 2: (3- 3) This equation must be used carefully. For ... used in engine-driven power plants. Re- fer to chapter 7 of the N&V manual for noise data on these sources. 2- 13 Since the directivity is also related to wavelength 3- 3. Reactive...

Ngày tải lên: 12/08/2014, 16:21

... category 4 or 5 area. Pad details are given in paragraph d(1) below. (3) For engines above 1200 rpm and under 40 0 hp. A concrete inertia block is not required for this 3–13 engine speed and power ... speed and power. b. On-grade location. The chart in figure 3–2 shows the paragraphs below that give recom- mended vibration isolation treatments for various combinations of engine speed...

Ngày tải lên: 12/08/2014, 16:21

... the power plant. This would reduce indoor SPLs but would not change the outdoor SPLs. If possible, other large buildings on the base could be used to shield the housing area from the power plant. ... control the noise. a. Description of power plant. In this example, a 15-MW plant is supplied by the manufacturer in a packaged form as shown in figure 4– 29. Item 13 shows an indoor...

Ngày tải lên: 12/08/2014, 16:21

... dense woods between the power plant and the hospital. The woods are about 500 ft. deep, and the trees are about 40 ft. high. The top of the exhaust stack of the power plant is about 30 ft. above ... Finally, Item 2 is the algebraic sum of Items 3 and 4. Thus, Item 2 represents the total PWL of the power plant sound that would just produce an NC–20 in- door criterion at the hospita...

Ngày tải lên: 12/08/2014, 16:21

... both continous tool paths and commands of feed and speed rates, it is possible to drive the mechanic functions of a machine tool to much higher speeds, accelerations and decelerations. This can ... permits very high table feeds. These cutters are suitable for machining interrupted cast-iron surfaces, roughing cast-iron and small depth of cut in steel. Also in materials where the cuttin...

Ngày tải lên: 13/08/2014, 05:20

... rings protect the bearing unit from the penetration of water in the seating area of the cup. 46 : Axle box roller bearings of the ICE driving unit 37 Driven and non-steered rear wheel of a rear ... shaft bearings and stern tube bearings . . . . . . . . . . . . . . . . . . . . . . . . . .4/ 8 63-64Ship shaft thrust blocks . . . . . . . . . . . . . .4/ 8 The Design...

Ngày tải lên: 13/08/2014, 05:21

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Ngày tải lên: 13/08/2014, 05:22