Study on Preload of Bolted Connections in Pitch Bearing Based on Vibration Modal Analysis

Table 4

Convergent data.

Solution number	Nodes	Elements	1st mode frequency (Hz)	Change (%)
1	1542	388	22286	−0.781; −0.515; −0.038
2	10067	5940	22114
3	69285	46143	22001
4	488218	346350	21995