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In recent years, attentions on smooth aluminium sheathed cables has continued to increase in China, but at present, the researches on the laying of smooth aluminium sheathed cables are still insufficient. Conductor heating caused by thermo-mechanical stress during laying process of cable may cause safety problems. In this paper, a finite element model of smooth aluminium sheathed cable under vertical serpentine laying was established, and the thermo-mechanical effect of the cable was calculated and analyzed. The results show that the vertical serpentine laying of cable would generate serpentine arc lateral slip, making the axial force induced by thermal effect much smaller than that of the straight laying of cable, which meet the long-term safe operation conditions of cable. With the increase of temperature, the lateral slip of vertical serpentine laying gradually increase, the increase trend is consistent with the theoretical calculation results, and the axial force changes from tensile force to compressive force and then gradually increase. By appropriately increasing the arc width and semi-serpentine pitch of vertical serpentine laying of cable, the axial force of cable can be reduced.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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