| 大型筒式柴油打桩锤冲击活塞动应力分析 |
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| 引用本文： | 王金彦,周细应,龚秀刚. 大型筒式柴油打桩锤冲击活塞动应力分析[J]. 中国工程机械学报, 2012, 10(1): 54-57 |
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| 作者姓名： | 王金彦 周细应 龚秀刚 |
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| 作者单位： | 1. 上海工程技术大学材料工程学院,上海,201620
2. 上海工程机械厂有限公司,上海,200072 |
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| 基金项目： | 上海市科委科研攻关资助项目（09QT1405800）; 上海市重点学科建设资助项目（J51402） |
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| 摘 要： | 分析了柴油桩锤的工作原理及现代桩锤动力学研究现状.运用能量守恒原理推导了上、下活塞受冲击后冲击面上的速度及应力波的传递过程,并运用波动理论计算了大型柴油桩锤上活塞的动应力,指出了上活塞的主要破坏形式及改进方法.
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| 关 键 词： | 波动理论 桩锤 应力波 疲劳断裂 |
Dynamic stress analysis on impact piston of large-scale cylindrical diesel pile hammer |
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| WANG Jin-yan , ZHOU Xi-ying , GONG Xiu-gang. Dynamic stress analysis on impact piston of large-scale cylindrical diesel pile hammer[J]. Chinese Journal of Construction Machinery, 2012, 10(1): 54-57 |
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| Authors: | WANG Jin-yan ZHOU Xi-ying GONG Xiu-gang |
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| Affiliation: | 1.School of Materials Engineering,Shanghai University of Engineering Science,Shanghai 201620,China; 2.Shanghai Engineering Machinery Co.,Ltd.,Shanghai 200072,China) |
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| Abstract: | Firstly,the working principle of diesel pile hammers,together with dynamical advances of pile hammers,is presented.Then,the velocities on impact surfaces of upper and lower pistons are deduced based on the law of energy conservation.By analyzing the transfer process of stress waves and calculating the upper hammer dynamic stress via wave theory,the major damage forms and corresponding improvement methods are pinpointed. |
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| Keywords: | wave theory pile hammer stress wave fatigue crack |
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