Simply Supported Beam Natural Frequency Formula: SymbolParameterKnA constant where n refers to the mode of vibration. Mode 1 – Kn = 9.87 Mode 2 – Kn = 39.5 Mode 3 – Kn = 88.8 Mode 4 – Kn = 158 Mode 5 – Kn =247Simply Supported Beam Natural Frequency – Amesweb amesweb.info › Vibration › Simply-Supported-Beam-Natural-Frequency-C…