考虑门杆耦合效应的反弧门自振特性分析

Self-vibration characteristics analysis of reversed tainter valve considering coupling effect of valve and boom

针对高水头船闸大型反弧门结构动力设计安全问题,进行阀门、门杆系统自振特性三维有限元计算,探讨门杆耦合特性及主要结构尺寸的敏感性。研究表明,门杆耦合系统模态更加丰富,自振特性由吊杆起决定性作用,系统基频11.59 Hz,为吊杆单独弯曲振动,吊杆-门体耦合自振频率略低于门体,吊杆长度对系统自振特性影响较大,支臂外包面板厚度基本没有影响。

In view of the dynamic design safety problem of large reversed tainter valve of high water head ship lock, self-vibration characteristics＇ 3D FEM calculation about the valve and the system of the valve and boom is conducted to study the coupling effectiveness and sensitiveness of the main structure＇s dimension.It reveals that the boom is dominant for the self-vibration characteristics of the system.The basic frequency of the system is 11.59 Hz and vibration mode is bending vibration of the boom itself.The self-vibration frequency of the valve and boom is slightly lower than that of the valve itself.The self-vibration characteristics of the system are affected obviously by the length of the boom and the thickness of the arm plate has little effectiveness.