针对矿山用泵机组在运行过程中功耗过大的问题,以机组中各泵的流量为自变量,以总流量、单台泵流量、泵开启台数为约束条件,以电机的总输入功率最小为目标函数,建立了矿山用泵机组优化运行的数学模型.利用遗传算法得到泵机组在给定总流量下的最优流量分配,使其经济运行,并改善了泵机组粗调或不调的现状.

针对岸边集装起重机的寿命预估问题,提出了一种基于有限元分析与有效应力强度因子幅的起重机寿命预估方法.利用Ansys Workbench软件对起重机模型进行仿真计算,并获得起重机疲劳校核点的应力-时间历程,运用雨流计数法获得应力循环,以有效应力范围对其进行表征.在起重机寿命预估的过程中,有效应力强度因子幅能够反映载荷循环应力比的影响,相较于传统的Paris模型,基于有效应力因子幅的起重机寿命预估方法更为准确.

In present society, port container transportation is a basic need for the costal country. The quayside container crane plays a vital role in port transportation field. Taking 80t quayside container crane as the subject, the three-dimensional model of crane steel structure with plates was established;the element analysis by means of Workbench and multi-measuring points stress test of quayside container crane steel structure was carried out. The simulationresults werecompared with test results to prove the correctness of the model. On the basis, the strength, rigidity and fatigue property of the crane was analyzed. Finally, some design and manufacture suggestions about craneswere given.