Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Anti-icing method for open type water delivery trunk canal
The invention discloses an anti-icing method for an open-type water delivery main canal, which is characterized in that the water surface of the open-type water delivery main canal is prevented from icing through anti-icing devices of the open-type water delivery main canal, and the anti-icing devices of the open-type water delivery main canal are distributed in the open-type water delivery main canal in a matrix manner; when transverse wind power bypasses the upper free unconstrained end, Karman vortex type vibration is formed in the leeward direction of the upper free unconstrained end, and a vortex shedding frequency range is generated; when transverse wind blows the upper free unconstrained end, the upper free unconstrained end generates vertical rod natural vibration under the constraint of the constraint device, and a vertical rod natural vibration frequency range is generated; when the vortex falling frequency range and the natural vibration frequency range are overlapped, vortex-induced resonance is generated, the air damping characteristic of the cylindrical vertical rod is changed through the restraining device, vibration-amplified torque is formed, the vibration-amplified torque is transmitted to the lower free unrestrained end in the length direction of the cylindrical vertical rod, vibration is generated by overcoming the hydraulic constraint on the water surface, and therefore the vortex-induced resonance is generated. Therefore, the water surface of the open type water delivery trunk canal is prevented from freezing.
本发明公开了一种敞式输水干渠的防结冰方法，它通过开敞式输水干渠的防结冰装置防止开敞式输水干渠水面结冰，所述开敞式输水干渠的防结冰装置在开敞式输水干渠中呈矩阵分布；当横向风力绕过上自由无约束端时，上自由无约束端的背风向形成卡门涡型振动，生成漩涡脱落频率范围；当横向风力吹动上自由无约束端时，上自由无约束端在约束装置约束下产生立杆自振，生成立杆自振频率范围；当漩涡脱落频率范围与自振频率范围重叠时，产生涡激共振，并通过约束装置改变圆柱状立杆的空气阻尼特性，形成振动放大的力矩，振动放大的力矩沿圆柱状立杆长度方向传递至下自由无约束端，通过克服水表面的水力约束产生振动，从而防止开敞式输水干渠水面结冰。
Anti-icing method for open type water delivery trunk canal
The invention discloses an anti-icing method for an open-type water delivery main canal, which is characterized in that the water surface of the open-type water delivery main canal is prevented from icing through anti-icing devices of the open-type water delivery main canal, and the anti-icing devices of the open-type water delivery main canal are distributed in the open-type water delivery main canal in a matrix manner; when transverse wind power bypasses the upper free unconstrained end, Karman vortex type vibration is formed in the leeward direction of the upper free unconstrained end, and a vortex shedding frequency range is generated; when transverse wind blows the upper free unconstrained end, the upper free unconstrained end generates vertical rod natural vibration under the constraint of the constraint device, and a vertical rod natural vibration frequency range is generated; when the vortex falling frequency range and the natural vibration frequency range are overlapped, vortex-induced resonance is generated, the air damping characteristic of the cylindrical vertical rod is changed through the restraining device, vibration-amplified torque is formed, the vibration-amplified torque is transmitted to the lower free unrestrained end in the length direction of the cylindrical vertical rod, vibration is generated by overcoming the hydraulic constraint on the water surface, and therefore the vortex-induced resonance is generated. Therefore, the water surface of the open type water delivery trunk canal is prevented from freezing.
本发明公开了一种敞式输水干渠的防结冰方法，它通过开敞式输水干渠的防结冰装置防止开敞式输水干渠水面结冰，所述开敞式输水干渠的防结冰装置在开敞式输水干渠中呈矩阵分布；当横向风力绕过上自由无约束端时，上自由无约束端的背风向形成卡门涡型振动，生成漩涡脱落频率范围；当横向风力吹动上自由无约束端时，上自由无约束端在约束装置约束下产生立杆自振，生成立杆自振频率范围；当漩涡脱落频率范围与自振频率范围重叠时，产生涡激共振，并通过约束装置改变圆柱状立杆的空气阻尼特性，形成振动放大的力矩，振动放大的力矩沿圆柱状立杆长度方向传递至下自由无约束端，通过克服水表面的水力约束产生振动，从而防止开敞式输水干渠水面结冰。
Anti-icing method for open type water delivery trunk canal
开敞式输水干渠的防结冰方法
LIANG BO (Autor:in) / CUI LEI (Autor:in) / QIN YALAN (Autor:in) / CHEN RUI (Autor:in) / XIE FANGXIANG (Autor:in) / YUE LINGLING (Autor:in) / LIU DENGFENG (Autor:in)
05.05.2023
Patent
Elektronische Ressource
Chinesisch
IPC:
E02B
HYDRAULIC ENGINEERING
,
Wasserbau
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