Table 7 The first eight natural... | Emerald Publishing

Table 7

The first eight natural frequencies of the rotary composite laminated plate and conical–cylindrical double cavities coupled system with various rotation angles

ϑ	Mode number
ϑ	1	2	3	4	5	6	7	8
π/4	84.953	149.439	169.809	171.897	180.560	193.876	223.370	226.293
π/2	74.921	84.917	94.274	113.247	149.379	169.133	171.665	180.493
3π/4	49.971	63.493	84.906	98.525	99.807	124.060	130.987	149.368
π	37.484	47.798	74.907	84.901	92.815	94.270	112.224	113.199
5π/4	29.986	38.305	59.949	75.919	84.897	89.848	90.051	103.915
3π/2	24.995	31.956	49.966	63.492	74.908	84.892	88.509	94.267
7π/4	21.429	27.402	42.826	54.561	64.223	81.189	84.894	85.581
2π	37.478	37.626	47.795	47.904	74.897	79.243	84.880	92.769

ϑ	Mode number
ϑ	1	2	3	4	5	6	7	8
π/4	84.953	149.439	169.809	171.897	180.560	193.876	223.370	226.293
π/2	74.921	84.917	94.274	113.247	149.379	169.133	171.665	180.493
3π/4	49.971	63.493	84.906	98.525	99.807	124.060	130.987	149.368
π	37.484	47.798	74.907	84.901	92.815	94.270	112.224	113.199
5π/4	29.986	38.305	59.949	75.919	84.897	89.848	90.051	103.915
3π/2	24.995	31.956	49.966	63.492	74.908	84.892	88.509	94.267
7π/4	21.429	27.402	42.826	54.561	64.223	81.189	84.894	85.581
2π	37.478	37.626	47.795	47.904	74.897	79.243	84.880	92.769