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基于灵敏度分析的门式起重机结构优化设计 总被引:1,自引:0,他引:1
针对门式起重机的结构特点,运用ANSYS软件的APDL语言创建了门式起重机参数化有限元模型,在两种危险工况下对其进行有限元分析,获得了门式起重机在这两种危险工况下的最大等效应力与变形分布。根据分析结果,对门式起重机的结构进行灵敏度分析,得到对门式起重机总体积影响较大的截面尺寸和外形尺寸,基于此,运用ANSYS软件内部的sub-problem优化算法对这些尺寸进行优化设计。在满足刚度和强度要求的前提下,使优化后的门式起重机总质量减轻了19.3%,取得了较好的优化效果。 相似文献
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大型造船门式起重机是一种设计要求很高的起重机,特以600 t造船门式起重机为例,介绍了金属结构设计过程中工况的选取和载荷计算方法,并运用ANSYS软件对该起重机进行有限元分析。计算结果满足强度和刚度要求,这种仿真方法为设计校核提供指导,提高设计效率。 相似文献
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以Pro/Engineer 4.0为建模工具,结合Top Down装配原则和双梁门式起重机的结构特征,创建双梁门式起重机主要结构件和子装配件。通过虚拟装配技术组建双梁门式起重机的三维设计模型,对双梁门式起重机进行尺寸分析与干涉分析,为后期的CAE做模型准备。 相似文献
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《机械工程学报(英文版)》2010,(6)
Steel structure system of crane deteriorates over time due to environmental effects,material fatigue,and overloading.System structural reliability and remaining service life assessment methods are developed during the few decades.But until now estimating remaining service life methods of crane steel system by reliability theory begin to develop.Safety assessment of existing steel structure system requires the development of a methodology that allows for an accurate evaluation of reliability and prediction of the remaining life.Steel structures are the supporting elements in the special equipment such as hoisting machinery.Structure reliability and remaining service life safe assessment are important for steel structures.For finding the reason which caused the failure modes(such as fatigue strength failure,stiffness failure and stability failure),incremental loading method based on possibilistic reliability is applied into dynamic structure failure path research.Through reliability analyzing and calculating for crane,it is demonstrated that fatigue damage is the most common failure mode.Fuzzy fatigue damage accumulation theory is used for basis theory and Paris-Eadogan equations are used for mathematical modeling.All fatigue parameter values of the welding box girder of bridge cranes are determined and fatigue remaining life formulas are deduced.After field test and collecting working parameters of numerous cranes,typical fatigue load spectrum was compiled for the dangerous point of box girders used in the area.Fatigue remaining life is assessed for different types and lifting capacities.Safety for steel structure system of bridge crane is assessed by two quantitative indexs:reliability and remaining life.Therefore,the evaluation means is more comprehensive and reasonable.The example shows that the two quantitative indexs are mutually correlated.Through analyzing the 120 t-22.5 m bridge crane of a certain enterprise,a new methodology to estimate remaining service life of steel structure by possibilistic reliability theory is introduced for safety evaluation of structure system. 相似文献
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用有限元方法安全评估水库门式启闭机的金属结构 总被引:1,自引:0,他引:1
刚度和强度是评价金属结构安全性能的重要指标.本文利用三维有限元软件ALGOR,对某水库坝顶门式启闭机的金属结构进行了模拟和计算分析,并根据规范对其主梁刚度的要求和在役启闭机的强度判别标准,阐述了如何运用计算结果对门式启闭机金属结构的刚度和强度进行校核. 相似文献
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铸造起重机一般为四梁双小车结构,主要用于炼钢车间吊运铁水包和钢水包,且铁水包和钢水包的耳轴方向在整个流程中保持不变,翻包时只能平行主梁方向倾翻.但是,当铁水包和钢水包的耳轴方向需要旋转90°时,必须采用四梁双小车吊钩旋转铸造起重机.为解决这一问题,开发设计了双主梁单小车垂直主梁倾翻铸造起重机,其结构特点是主、副钩排列由... 相似文献
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强度和刚度是评价金属结构安全性能的重要指标。本文以某厂180/50T铸造吊为例,根据桥架金属结构的特点,采用三维有限元软件ALGOR对其进行了模拟和计算,并根据在役桥架的强度刚度判别标准和《起重机设计规范》对桥架金属结构强度和刚度的要求,阐述了如何运用计算结果对其强度和刚度进行校核。 相似文献
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基于对金属结构的稳定性分析,并对南通1号集装箱桥机测试结构进行分析,对该机改造提出了建议.这些建议对其他同类型的集装箱桥机的维护管理也有一定的借鉴意义. 相似文献
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本文针对目前部分新型桥式起重机金属结构,在设计制造与受力分析方面存在较大的难题.以180/50t铸造吊为例,采用现代设计方法对箱形梁桥架主梁进行了有限元分析,保证了设备的安全性和合理性. 相似文献