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关于井内弹击器的设想
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作者 余庆 《甘肃科技》 2012年第15期76-77,共2页
在硬脆碎不稳定地层,坍塌掉块卡钻事故经常发生,造成严重损失。利用钻杆和钢绳拉伸后,复原产生的力量,设计了井内弹击器,直接打击卡点,并详细地介绍了设计原理和使用方法,对提高处理事故效率,降低损失有一定的适用价值,同时对开拓处理... 在硬脆碎不稳定地层,坍塌掉块卡钻事故经常发生,造成严重损失。利用钻杆和钢绳拉伸后,复原产生的力量,设计了井内弹击器,直接打击卡点,并详细地介绍了设计原理和使用方法,对提高处理事故效率,降低损失有一定的适用价值,同时对开拓处理事故的思路具有指导意义。 展开更多
关键词 钻孔 卡钻 安全接头 弹击器 行程 性变形
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锥盘——弹击式通用排肥器研究
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作者 陶文兵 许绮川 +1 位作者 夏俊芳 叶峻 《湖北农机化》 2002年第2期23-24,共2页
引言 化肥存在物理机械性状截然不同的两大类:一类是碳酸氢铵与过磷酸钙等粉状化肥,由于它们易吸湿粘结,因而易造成机械排肥时架空和堵塞;另一类是尿素、硫酸铵、硝酸铵、磷酸铵和氯化钾等小颗粒化肥,由于它们流动性好,稍遇... 引言 化肥存在物理机械性状截然不同的两大类:一类是碳酸氢铵与过磷酸钙等粉状化肥,由于它们易吸湿粘结,因而易造成机械排肥时架空和堵塞;另一类是尿素、硫酸铵、硝酸铵、磷酸铵和氯化钾等小颗粒化肥,由于它们流动性好,稍遇缝隙即自流不止,施量…… 展开更多
关键词 锥盘--式通用排肥 结构 工作原理 设计
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Theoretical analysis and experimental investigation of a high-performance viscoelastic material shock absorber 被引量:4
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作者 TONG Zhi-hui SU Tie-xiong LIU Han-tao 《Journal of Measurement Science and Instrumentation》 CAS CSCD 2019年第3期213-218,共6页
To improve the performance of traditional mechanical shock absorber, a new type of high molecular polymer is formulated and applied to overloaded vehicle shock absorber. According to the operating principle of high-pe... To improve the performance of traditional mechanical shock absorber, a new type of high molecular polymer is formulated and applied to overloaded vehicle shock absorber. According to the operating principle of high-performance viscoelastic material shock absorber, the geometrical structure of shock absorber is designed and machined. Then its theoretical model is derived by using analytical method, and the impact test is carried out on high-performance viscoelastic material shock absorber. The results show that experimental and theoretical damping force curves have good agreement, which validates the credibility of theoretical model. The investigation provides a potential way to enhance damping performance and increase vehicle load. 展开更多
关键词 viscoelastic material shock absorber damping force impact test
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Using a SVM to evaluate damage to vibration isolators in an elastic raft system
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作者 JIANG Feng FENG Qi 《Journal of Marine Science and Application》 2007年第4期48-54,共7页
Predicting damage to vibration isolators in a raft experiencing heavy shock loadings from explosions is an important task when designing a raft system. It is also vital to be able to research the vulnerability of heav... Predicting damage to vibration isolators in a raft experiencing heavy shock loadings from explosions is an important task when designing a raft system. It is also vital to be able to research the vulnerability of heavily shocked floating rafts unreliable, especially when the allowable values The conventional approach to prediction has been or ultimate values of vibration isolators of supposedly uniform standard in a raft actually have differing and uncertain values due to defective workmanship. A new model for predicting damage to vibration isolators in a shocked floating raft system is presented in this paper. It is based on a support vector machine(SVM), which uses Artificial Intelligence to characterize complicated nonlinear mapping between the impacting environment and damage to the vibration isolators. The effectiveness of the new method for predicting damage was illustrated by numerical simulations, and shown to be effective when relevant parameters of the model were chosen reasonably. The effect determining parameters, including kernel function and penalty factors, has on prediction results is also discussed. It can be concluded that the SVM will probably become a valid tool to study damage or vulnerability in a shocked raft system. 展开更多
关键词 elastic raft vibration isolator shock DAMAGE SVM
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