The vibrations and sounds of a diesel engine are very complex because of the engine's reciprocating movement and the variations in its operating cycle. It is therefore very difficult to detect mechanical troubles by these signals. This study makes it clear that in many cases, the time domain data monitoring of high frequency signals of over 20 kHZ or of fairly high order natural frequencies of the system are effective detection methods. The study also shows that detection by vibrational signals is much superior to that by acoustic signals. These two kinds of relatively high frequency signals, which are not so large during normal operation, greatly increase during abnormal operation to a greater extent than the low frequency signals or the low order natural frequencies of the system. Therefore, it becomes somewhat easier to detect trouble by monitoring such high frequency signals.(Wassmann)
The detection of troubles in marine Diesel engines by sound and vibration
Die Schadenerkennung bei Schiffsdieselmotoren durch Schall und Schwingungen
ISME '78. THE INTERNAT. SYMP. ON MARINE ENGNG. MESJ-SYMP. ; Nov ; 311-323
1978
13 Seiten, 23 Bilder, 2 Tabellen, 2 Quellen
Aufsatz (Konferenz)
Englisch
Troubles in operation of diesel engines
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