夯管锤结构优化设计及有限元计算分析

Optimizing Design and Finite Element Analyses of the Structure of Pipe Hammer

对YH-300A型夯管锤的工作过程建立了力学模型及优化设计的数学模型,利用复合形法,以冲击功的倒数作为目标函数,对结构进行了优化设计,并对原设计进行了冲击功和冲击频率的计算。经过优化设计并同原设计进行对比,冲击功提高19%,冲击频率略有提高。同时,对其活塞进行了有限元计算,对原设计和优化后的活塞进行有限元分析均表明,除冲击面的应力较大外,最大应力均发生在活塞的进、排气孔处。因此,在应用应力波理论进行强度校核的同时,还应该利用有限元法进行强度校核计算,以补充应力波理论在强度计算应用方面的不足。

This page has set up a mechanics model and a optimized mathematics model of the working process for the YH-300A Pipe Hammer Using compound model method. Regarding the impaction energy as object number, we can make an optimizing design to the structure. This page also makes a calculation of impaction energy and impaction frequency of the original structure. After the optimize calculation, comparing to the original design the impaction energy has improve at least 19% and the impaction frequency has improve a little. At the same time, we make the finite element calculation to the piston of the YH-300A Pipe Hammer. After the finite element calculation, both the original design and the optimized design have proved the biggest stress located in the vent. And the stress on the impaction side is great. So we should use the finite element method to collate the intension of the body as we use the shock wave method to collate the intention. It can improve the shortage of the using of shock wave method in the intention calculation.