Steady Wind Load on External Surface and Its Effect on Wind-Induced Response for a 200 m High Natural-Draught Cooling Tower

Table 3

The Fourier coefficients of each harmonic of specification curves.

Specification curve	Harmonic coefficient
	a0	a1	a2	a3	a4	a5	a6	a7
China-with rib	−0.3919	0.2581	0.6013	0.5042	0.1052	−0.0955	−0.0194	0.0475
China-without rib	−0.4425	0.2460	0.6757	0.5356	0.0609	−0.1393	0.0010	0.0644
VGB-K1.0	−0.3181	0.4211	0.4841	0.3844	0.1419	−0.0506	−0.0718	0.0014
VGB-K1.1	−0.3421	0.4018	0.5106	0.4142	0.1394	−0.0687	−0.0736	0.0137
VGB-K1.2	−0.3715	0.3773	0.5397	0.4459	0.1351	−0.0861	−0.0714	0.0269
VGB-K1.3	−0.4012	0.3549	0.5723	0.4756	0.1256	−0.1029	−0.0630	0.0419
VGB-K1.5	−0.4616	0.3096	0.6408	0.5378	0.1021	−0.1412	−0.0421	0.0730
VGB-K1.6	−0.4994	0.2937	0.6938	0.5559	0.0711	−0.1467	−0.0200	0.0714