SL型装船机卷扬系统扭振特性研究

TORSIONAL CHARACTERISTIC OF SL SHIPLOADER BOOM LUFFING WINCH SYSTEM

针对SL型装船机卷扬系统平台振动问题,采用集中质量法建立卷扬系统轴系的扭振数学模型,此模型考虑卷筒齿轮的非线性综合啮合刚度以及俯仰臂以不同速度摆动时卷筒负载的非线性。采用变步长Runge-Kutta方法分别求解扭振系统在电机典型低速235.5 r/min、中速674.5 r/min、高速958.8 r/min运行时的动力学响应,得到相应的开式小齿轮轴转矩响应曲线,并通过频谱分析得到系统响应的频谱特性。计算结果表明,随着卷扬电机速度升高,齿轮综合啮合刚度非线性对扭振系统影响迅速强化,转矩响应峰值逼近啮合频率。计算结果与实测结果频率特性基本吻合,验证了卷扬系统扭振数学模型的正确性。

For the SL shiploader boom luffing winch system platform vibration,using lumped mass method,the boom luffing winch system shafting torsional vibration model has been built,which considers the nonlinear integrated gear mesh stiffness of the winch gears and winch nonlinear loads when boom luffing swinging at different speeds.Using variable-step Runge-Kutta method the dynamics responses of the torsional vibration system have been solved respectively during typical motor speeds low 235.5 r/min,medium 674.5 r/mi...