Research on the Simulation Method for Equivalent Stiffness of Bolted Connection Thin Plate Structures

Table 7

Bolt nonlinearized equivalent of the first 4th-order natural frequency of the structure.

	1st frequency/Hz error	2nd frequency/Hz error	3rd frequency/Hz error	4th frequency/Hz error
1KN-10 N	20.592	80.242	126.17	230.64
	0.179%	0.539%	0.888%	0.650%
1KN-12.5 N	20.588	79.923	126.14	230.64
	0.199%	0.139%	0.864%	0.650%
1KN-15 N	20.590	80.089	126.15	230.64
	0.189%	0.347%	0.872%	0.650%
2.5KN-10 N	20.636	80.025	126.51	230.51
	0.034%	0.267%	1.159%	0.706%
2.5KN-12.5 N	20.578	80.776	126.06	230.49
	0.247%	1.208%	0.780%	0.715%
2.5KN-15 N	20.558	80.776	126.06	230.49
	0.344%	0.640%	0.672%	0.715%
5KN-10 N	20.593	81.044	126.18	230.23
	0.175%	1.544%	0.900%	0.827%
5KN-12.5 N	20.540	80.920	125.76	230.21
	0.431%	1.388%	0.560%	0.836%
5KN-15 N	20.504	80.567	125.48	20.21
	0.606%	0.946%	0.336%	0.836%
10KN-10 N	20.479	81.044	125.30	229.68
	0.727%	1.544%	0.192%	1.064%
10KN-12.5 N	20.442	80.99	125.01	229.67
	0.906%	1.476%	0.040%	1.068%
10KN-15 N	20.417	80.915	124.83	229.67
	1.028%	1.382%	0.184%	1.068%