基于同步失效准则的新型双吊点取料臂研究

OPTIMAL SUSPENSION POINTS BASED ON SYNCHRONOUS FAILURE PRINCIPLE FOR A NEW DOUBLE HOISTING RECLAIMING BOOM

半门式刮板取料机是一种连续高效的散料装卸设备,其桁架式取料臂通过钢丝绳悬吊在半门架下。取料臂的悬吊位置决定其弯矩和应力分布情况,从而直接影响取料臂的安全。本文在单吊点取料臂的基础上,提出一种新型等力双吊点取料臂,具有应力小且分布更合理等优点。基于同步失效准则建立取料臂的悬吊位置设计模型,推导出最优悬吊位置的解析结果。通过实例分析验证了,相比传统单吊点取料臂,等力双吊点取料臂应力分布更加合理、形变更小。

The semi-portal scraper reclaimer is a continuous and efficient bulk material loading equipment,which is widely used in industry.Truss-type reclaiming boom hanging under the semi-portal frame is an important part of the scraper reclaimer.The hanging position of the reclaiming boom determines its bending moment and stress distribution,which directly affects safety.In this paper,a kind of reclaiming boom with dual equal-force hanging point is proposed,which shows better stress distribution than the reclaiming boom with a single hanging point.Based on the simultaneous mode of failure approach,a mathematical model is built for the hanging position design of reclaiming boom,and subsequently the optimal hanging position is determined.Finally,a numerical example demonstrates the superiority of the proposed model.