共查询到20条相似文献,搜索用时 62 毫秒
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借助有限元分析软件ANSYS建立了货架有限元分析的结构模型和荷载模型,提出了通过输入地震加速度反应谱,采用平方和平方根(SRSS)的模态叠加方法对货架结构进行地震反应分析的方法,并对计算结果进行了变形验算,结构符合抗震设计要求。 相似文献
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针对钢结构屋架在动载荷作用下,可能出现振动,给钢结构建筑物的安全使用带来一定隐患,利用ANSYS软件建立钢结构屋架的有限元模型,对屋架结构进行了模态分析,得出该屋架结构的固有频率和各阶振型,找到结构中的危险区域,为屋架结构改进和优化设计提供依据。 相似文献
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采用ABAQUS软件对某发动机的机油滤清器支架进行模态分析,计算其主要阶次的固有频率及振型,以及支架的应力、应变云图,并对支架的高周疲劳进行了分析,计算结果满足评价指标,表明该支架结构设计合理,能够满足使用要求。 相似文献
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应用模态分析的振动支架优化设计 总被引:1,自引:0,他引:1
振动实验用支架在使用过程中经常出现裂纹,采用大型有限元分析软件ANSYS对支架进行模态分析,获得结构的前三阶频率和振型,根据分析结果提出改进支架结构的方案,并再次进行有限元计算,验证改进方案的可行性.经过优化后的振动支架工作可靠,使用寿命长. 相似文献
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耿玉兰 《江苏机械制造与自动化》2007,36(6):50-51
汽车车身的强度与乘客的安全密切相关,所以在整个汽车设计中车身的强度设计十分重要。利用ANSYS对车身进行了模态分析,了解了车身的固有特性,对其进行优化设计起了重要作用。 相似文献
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以客车车身结构为研究对象,介绍了随机响应的理论基础,讨论了路面不平度的功率谱密度在进行数值计算时的采样特性,对模型进行解耦并施加路面不平度载荷;最后,对随机响应结果进行分析,并用试验进行验证.实例计算表明,随机响应分析对改善车身结构强度具有指导意义. 相似文献
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门式起重机的模态分析 总被引:1,自引:0,他引:1
为了更好地设计门式起重机(简称门机),用ANSYS建立门式起重机的整体有限元模型,对其进行模态分析,得出模型的固有频率和振型。分析了固有频率的影响因素,得出提高固有频率的措施。从避免共振的角度提出了选择起重机部件的参数。 相似文献
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大型钢结构件有限元力学分析方法研究 总被引:4,自引:0,他引:4
大型钢结构件有其独特的结构特点和载荷特点,在对其进行有限元力学分析时也有其相应的方法和特点,但目前具体介绍大型钢结构有限元力学分析方法和技巧的资料几乎没有。结合工程实际,对基于ANSYS软件的大型钢结构件的结构及载荷特点、有限元建模及其力学分析方法进行了研究,为该类结构件有限元力学分析提供借鉴。 相似文献
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Jinn-Tong Chiu Yeou-Yih Lin 《The International Journal of Advanced Manufacturing Technology》2008,37(1-2):83-91
In this study, a three-dimensional finite element model was established to perform modal analysis of the chemical mechanical
polishing process. The contact boundary conditions were considered in the wafer and pad, and the influence of the static load
exerted on the carrier was considered in order to investigate dynamic behaviour of the wafer. The analysis was in two steps.
Firstly, a given pressure was exerted on the carrier and the geometric nonlinear effect and large deformation theory were
used to carry out static analysis. Secondly, the results of the analysis were used to perform modal analysis of the wafer.
The results gave way to four conclusions. (1) Due to the offset configuration of the wafer and pad, the von Mises stress distribution
was asymmetric. Therefore, the stress on the wafer appeared to be almost uniform near its centre, goes through a maximum near
the edge, and decreased as the edge is approached. This tendency is similar to that of the removal rate profile experiment,
which proved that the proposed finite element model for CMP is acceptable. (2) Due to the extremely thin thickness of the
film, wafer and pad, most mode shapes are predominant in out-plane deformation. Furthermore, since the y-axis is symmetric in the three-dimensional model, there were double roots in some modes. (3) When the load was larger, the
tangent stiffness and the natural frequency would also be reduced. The pressure changes did not have much affect on mode shape.
(4) Since the soft materials of the pad and film have significantly different Young’s modulus’ than hard materials, the natural
frequencies of harder materials for the pad and film increase. 相似文献