【摘要】 针对全平衡卷扬式垂直升船机在液压动态调平下的纵倾稳定性问题,对承船厢的纵倾稳定性、钢丝绳临界吊点中心距的计算、各子系统的稳定特性及响应快速性进行了研究,提出了一种承船厢耦合系统纵倾稳定特性的分析方法。建立了浅水晃动子系统、液压调平子系统、主提升机械子系统与承船厢结构子系统相互耦合的机-液-固-流耦合系统动力学模型,并运用变步长龙格库塔法对耦合系统进行了位移响应计算。研究结果表明:龙格库塔法计算的临界吊点中心距与李雅普诺夫运动稳定性判据得到的结果接近,误差小于4%;各子系统中最容易失稳的是浅水晃动子系统;响应调整至稳态的速度由快到慢依次为液压调平子系统、承船厢结构子系统、主提升机械子系统与浅水晃动子系统。更多还原

【Abstract】 Aiming at the problem of pitch stability of the fully balanced hoist vertical shiplift under hydraulic dynamic leveling, the pitch stability of ship chamber, the calculation of wire rope critical distance of suspension points, the stability characteristics of each subsystem and the rapidity of response were studied. An analytical method for pitch stability characteristics analysis of ship chamber coupling system was presented. The mechanical-hydraulic-structural-fluid coupling dynamics model was established by coupling the shallow water sloshing subsystem, the hydraulic leveling subsystem, the main hoist mechanical subsystem and the ship chamber subsystem. The variable step Runge-Kutta method was used to solve the system displacement response.The results indicate that the wire rope critical distance of suspension points calculated by the presented method is close to the result obtained by the Lyapunov motion stability criterion(the error is less than 4%).Furthermore, the most vulnerable to instability is the shallow water sloshing subsystem, the speed of response adjusted to steady statefrom fast to slow is hydraulic leveling subsystem, ship chamber structural subsystem, main hoist mechanical subsystem and shallow water sloshing subsystem.更多还原