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转炉倾动机构扭力杆的有限元分析 总被引:2,自引:0,他引:2
应用UG三维仿真程序中scenario有限元分析模块对转炉倾动机构缓冲装置的扭力杆进行了理论研究,分析了扭力杆受力状况及应力分布状态,探讨了其结构力学特性,为扭力杆的设计和使用提供了理论依据。 相似文献
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扭力杆是全悬挂转炉倾动装置中的关键设备,其原理是利用扭力杆本体的扭转弹性变形来平衡转炉转动工作时的倾动力矩,确保了整个倾动装置的安全、平稳、长寿地运行。转炉倾动装置扭力杆在实际选用时,如果选用不当或设计不合理,会对倾动自身设备带来损伤,若扭力杆若刚度太大,反向的冲击力对倾动齿轮损害较大,如齿形断裂,大大减少齿轮箱的使用寿命,相反,扭力杆设计选用直径偏小,造成其工作扭转角度过大,超过单位扭转角,又或疲劳损伤造成扭力杆的断裂,引起重大生产安全事故,所以扭力杆的设计尤为关键,合理的扭力杆设计能使转炉倾动时晃动小,运行平稳,无异响,倾动齿轮箱设备寿命长,生产维护也少。通过运用实例,分别运用传统力学计算和三维建模有限元分析方法,对转炉扩容后的扭力杆的强度和刚度进行了核算;并根据核算结果,对扭力杆的结构进行了优化设计,解决了转炉倾动过程中的异响和磨损问题,使得扭力杆的设计更加合理,整个倾动装置运行平稳,扭力杆寿命显著提高。 相似文献
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通过实车试验,获得自行火炮扭力轴的随机载荷谱。采用材料的分段折线式循环应力、应变幅曲线,将改进的二阶矩法与Neuber法结合,提出计算扭力轴应力集中处局部应力、应变随机性的方法。根据随机性分析结果,获得由材料和载荷随机性引起的扭力轴局部应力、应变的概率密度函数,通过二重积分得到联合概率密度函数。结果表明,扭力轴同时具有高周和低周疲劳现象。结合工程实际提出计算不同工况下两种疲劳模式概率的方法,通过进一步研究可以得到自行火炮扭力轴的疲劳可靠性。研究方法对于工程机械装备疲劳可靠性分析和评估具有参考价值。 相似文献
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某钢厂扭力杆装置与事故支座之间增加了橡胶垫,针对增加橡胶垫后扭力杆装置与事故支座之间初始间隙能否满足扭力杆柔性缓冲性能要求的问题以及增加橡胶垫对扭力杆装置的影响,文中采用理论分析与有限元计算的方法,首先对扭力杆装置的柔性性能进行校核,再通过有限元计算进行验证,最后分析了橡胶垫对扭力杆装置的影响,并提出了合理的改进方案。 相似文献
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转炉系统中防转装置用以确保旋转接头的安全运转,对比分析转炉H架型旋转接头防转装置和扭力杆型防转装置,应用有限元法对扭力杆型防转装置的重要部件——外套和扭力杆系统进行了正常工作下两种工况的应力应变仿真分析,计算结果表明,20000N-m和40000Nm载荷下,外套的安全系数分别为,n1=9.42和n2:4.7,扭力杆装置安全系数分别为n3=3.2和n4=1.6,旋转接头扭力杆型防转装置主要部件应力均低于材料的许用应力,满足实际使用要求,能有效的缓冲旋转冲击负荷,安全性、可靠性高,具有较好的工程应用价值。 相似文献
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研究自动变速箱壳体强度分析的方法,即利用应力测定的方法进行变速箱壳体的静扭转测试。分析采用应变片测定变速箱壳体应力的原理,通过扭转机对变速箱总成施加扭力,进行变速箱壳体应变量、应力的测定,实施壳体强度耐久测试,以验证变速箱壳体的强度。比较各测点的实测应力与有限元分析得到的应力,结果表明:各测点实测应力与有限元分析得到的应力值相当,验证了有限元模型的正确性。根据该施加扭力的测试方法,实施变速箱壳体的强度耐久测试,能有效验证变速箱壳体的疲劳损伤及寿命。 相似文献
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介绍了小型扭杆弹簧倾斜仪的工作原理,使用ANSYS有限元分析软件对扭杆弹簧振子进行了静态、模态等分析,给出了应力云图和各阶振型图。从理论和实验方面研究了扭杆弹簧振子的固有频率,结果表明,实验测试与理论估算值同ANSYS分析值大体吻合。分析了倾斜仪的灵敏度与电容传感电路的灵敏度、扭杆弹簧振子几何尺寸等之间的关系,提出了一种新的振子弹性结构,有限元分析结果表明:此结构有利于提高倾斜仪的机械灵敏度,减少交叉耦合误差,增加了仪器机械本体的稳定性。 相似文献
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吴带迪 《现代制造技术与装备》2012,(4):51-52
运用结构分析、CATIA软件建模、运动学分析,同时结合理论计算,对某轻型载货汽车扭杆弹簧及其悬架进行了设计与开发;通过实验验证,证明扭杆弹簧的设计符合整车的开发要求。 相似文献
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V.G. Mokos 《International Journal of Mechanical Sciences》2011,53(10):897-909
In this paper, a boundary element method is developed for the nonuniform torsion of simply or multiply connected bars of doubly symmetrical arbitrary constant cross section, taking into account secondary torsional moment deformation effect. The bar is subjected to arbitrarily distributed or concentrated twisting and warping moments, while its edges are restrained by the most general torsional boundary conditions. To account for secondary shear deformations, the concept of shear deformation coefficient is used leading to a secondary torsion constant. Four boundary value problems with respect to the variable along the bar primary and secondary angles of twist and to the primary and secondary warping functions are formulated and solved employing a pure BEM approach, that is only boundary discretization is used. The warping and the primary torsion constants are evaluated employing the aforementioned primary and secondary warping functions using only boundary integration, while the secondary torsion constant is computed employing an effective automatic domain integration. Numerical examples with great practical interest are worked out to illustrate the efficiency and the range of applications of the developed method. The influence of the secondary torsional moment deformation effect of closed shaped cross sections is verified, while the accuracy of the proposed numerical procedure for the calculation of the secondary torsion constant compared with a FEM one is noteworthy. 相似文献
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Lijun Zhang Jincheng Zhao 《The International Journal of Advanced Manufacturing Technology》2013,68(9-12):1919-1925
In precise cropping of the metal bars with different geometrical parameters, it is very important to obtain the reasonable initial external forces required by the bars rapidly and accurately. Stress concentration factor and stress intensity factor are proposed to calculate the initial external force accurately in this paper according to geometrical sizes of metal bars. By means of numerical simulation and linear fitting method, the correctional expressions of stress concentration factor and stress intensity factor of V-shaped notch tip, which include the geometric parameters of the bar, are obtained respectively and the error analyses are also performed. The ratio of the depth of V-shaped notch to the diameter of the bar is presented to be a condition parameter. The numerical analytical results show that the method of stress concentration factor can be used to calculate the initial external force accurately when the ratio of the depth of V-shaped notch to the diameter of the bar is more than 0.05, and the method of the stress intensity factor can be used when the ratio is less than 0.05. The calculating formulas of reasonable initial external forces for the bars with different geometrical parameters are also given. The cropping experimental results have confirmed that it is feasible that the reasonable initial external forces required by the bars with different geometrical parameters are calculated effectively by using the stress concentration factor or the stress intensity factor in precision cropping. 相似文献