866-B330-03_Rev 1_MACHINERY AND WINCH FOUNDATIONS CALCULATIONS pdf.pdf

Proj No.

Date:

10/5/2021

AIR COMPRESSOR PARTICULARS:

1 Make BOSS Model FT4 210 DUS 210 CFM Final Tier 4 Diesel Air Compressor Weight (Static) 2620 lbs Max. load acting on a mount (dynamic) 1915.61 lbs

RPM 2400

Disturbing frequency of system (fd) 40.00 Hz Maximum transmissibility allowed (T) 10 %

Ratio of disturbing frequency to natural frequency,(fd/fn) 3.32 in

Spring stiffness required to obtain the desired natural frequency, = 28441.03 lbs/in

( 4977.18 ) kN/m

2 Make SAYLOR BEALL Model UL-758-14

21.2 CFM Final Tier 4 Diesel Air Compressor Weight (static) 670 lbs Max. load acting on a mount (dynamic) 446.51 lbs

RPM 900

Disturbing frequency of system (fd) 15.00 Hz

(fn) 4.52 Hz

Static deflection (ds) 0.4790 in Spring stiffness (K) 932.25 lbs/in

( 163.14 ) kN/m Note:

UNIT CONVERSION: Prep By BS Chk By CT App By

PROJECT TITLE:

TAI-1240 CRANE BARGE

SUBJECT:

RESILIENT MOUNT SELECTION AND TRANSMISSIBILITY CHECK

When the vibration frequency is not known, calculations of the disturbing frequency (Hz) can be done based on the operating speed (RPM).

1 lbs/inch = 0.175 kN/m

Natural frequency

Required static deflection (in) is calculated based on the natural frequency (Hz) of system which needs for 90% isolation or 10% transmissibility, (ds)

For selecting resilient mount, it is advisable to select a mount with a maximum load rating equal or greater than the calculated load per mount and a spring rate (K) less than the calculated spring rate.

= 0.0674

12.06 HzNatural frequency, considering the system needs 90% isolation, (fn)

Selected Standard Items

1 AIR COMPRESSOR, BOSS MAKE

REF: Prep By BS Chk By CT Apv By

2 AIR COMPRESSOR, SAYLOR BEALL MAKE

REF: Prep By BS Chk By CT Apv By