履带起重机提升过程中臂架系统的动载荷计算

A Calculation of the Crawler Crane Boom System' s Dynamic Load in the Lifting Process

为了求提升过程中斜坡脉冲载荷作用下的弹性件动载荷,将履带起重机的臂架系统简化为两个自由度的线性振动模型;采用运动分析法建立了由振动引起弹性件变形的几何方程,运用能量法建立斜坡脉冲载荷的振动数学模型,并运用叠加法分别计算出斜坡脉冲载荷作用下的线性振动系统在最大加载的提升过程中弹性件的响应——位移、速度、加速度、动载荷及动载荷系数;针对影响动载荷的主要因素提出有效的控制方法,为保证设备平稳的工作提供了有效依据.

To obtain the elastic element＇ s dynamic load under the action of slope pulse load in the lifting process, we simplified the crawler crane boom system as a linear vibration model with two degrees of freedom. Through the motion analysis, the geometry equations of deformation caused by elastic element＇ s vibration was established. The vibration mathematical model of the slope pulse load was established through energy＇ s method, and we also used superposition principle method to calculate elastic element＇ s the response, including displacement, velocity, acceleration and dynamic load coefficients of the linear vibration system with the greatest loading, under the slope pulse load. The effective control method can not only connect with the major factors about the dynamic load, but also provide practical basis for the equipment＇ s working performance.