基于ANSYS的护镜门振动特性分析

护镜门作为大孔口跨度的新式闸门,特殊的力学结构导致其振动特性较为复杂。以南京三汊河双孔护镜门为实例,针对闸门在动水中启闭时,闸门振动频率与闸门开度和振型阶数的关系,基于ANSYS模态分析模块,采用广义Westergaard公式模拟流固耦合中的附加质量,对于护镜门的振动特性进行研究。结果表明:在低阶模态时,考虑附加质量法的流固耦合模型基本符合真实工况;闸门有发生共振和动力失稳的风险,需要优化闸门结构和改进启闭机构。文章可为之后护镜门设计和优化提供参考。

Analysis on vibration characteristics of goggles gate based on ANSYS

As a new type long-span gate, goggles gate''s special mechanical structure result in its complex vibration characteristics. This article took Nanjing Sancha River double hole goggles gate as an example, revealed the relation between gate''s vibrational frequency, gate opening and modal order when the gate is opened and closed in the flowing water, simulated the added mass in fluid-structure interaction by generalized Westergaard formula based on ANSYS modal analysis module, and researched on goggles gate''s vibration characteristics. The results indicate that fluid-structure interaction which considered added mass conforms to real working condition in the low order modes. The gate is discovered that it has risk of resonance and dynamic instability. Gate structure and hoist mechanism need to be improved. The article can provide a reference for later design and optimization on goggles gate.