Description
Test procedures and a mounting configuration have been developed and evaluated for the vibration testing of propeller fans. The static testing procedures are discussed in this paper, and a companion paper discusses dynamic testing. Swept sine, random noise, and impact excitation all provide acceptable results for determining the resonance frequencies. Swept sine excitation usually provides acceleration information that is easiest to interpret. In order to accurately interpret the acceleration data and properly identify the resonance frequencies, it is necessary to obtain a plot of the blade tip acceleration as a function of frequency over the entire frequency range of interest. To identify all the excitable resonance frequencies, it is necessary to individually vibrate the leading tips of all blades and record the acceleration as a function of frequency on the leading tip of the excited blade or an adjacent blade. For some fans with more than four blades, it may only be possible to identify all of the excitable resonance frequencies by measuring the vibration of the leading tip of each excited blade.
Citation: ASHRAE Transactions, 1984, vol. 90, pt. 1A, Atlanta, GA
Product Details
- Published:
- 1984
- Number of Pages:
- 13
- File Size:
- 1 file , 1.1 MB
- Product Code(s):
- D-AT-2819
