排序方式: 共有11条查询结果,搜索用时 0 毫秒
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变结构变参数设计方法及其在机械CAD中的应用 总被引:4,自引:0,他引:4
提出了一种新颖的机械结构设计思想-变结构变参数设计方法,并结合实例,阐述了变结构变参数设计的概念、原则、实施措施和意义。由此对I-deas软件包进行了二次开发,编制了发动机曲轴专用CAD软件程序,并用某型号发动机曲轴进行了验证。 相似文献
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Modal Test/Calculation Correlation Study on the Lower Crankcase of High-Duty Diesel Engine 总被引:5,自引:2,他引:3
To set up the dynamic FEM model of a high-duty diesel‘s lower crankcase with sufficient precision, modal correlation research on tested and calculated modes have been fulfilled. MACs between each mode pairs, CoMACs and ECoMACs on each node of modal testing model have been calculated. On the assistant of modal shape comparison, MACs could afford information about correlating relations between tested and calculated mode groups. CoMACs and ECoMACs have pointed out the direction of structure modification to FEM model. The resuits of the study show that the analytic model built has a certain degree of accuracy. 相似文献
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自适应形状优化设计研究 总被引:1,自引:0,他引:1
目的提出一种基于结构边界强度的自适应形状优化设计的新方法,利用该方法对一大功率、高效柴油机的主轴承盖进行形状优化。方法以有限元模型中结构边界上的节点应力值来驱动节点位置的变化,利用物体热胀冷缩的数学模型,根据边界节点的应力值与给定的应力目标值,在边界节点上施加相应的温度载荷,使应力大于目标值的节点膨胀,反之收缩,最后达到边界上的节点应力均趋于给定的应力目标值,结果通过对一柴油机主轴承盖的优化,该主轴承盖的拱形外边界部分达到等强度,使之在满足强度要求的情况下质量减少到总量的55%,结论该方法高效、可靠,适用于受机械载荷作用连续体的内、外边界的形状优化设计。 相似文献
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Using the method of the parameter study, some important dimensions of the cylinder head of an internal-combustion engine are analyzed. Under the mechanical load, the variational rules of the yon Mises maximum stress on cylinder head are obtained, which are influenced by the thickness of the floor plate, head plate, jobbing sheet, standing partition board, and side plate of inlet port and exhaust port. A hypothesis is verified that there is an ideal matching point among those above-mentioned main parameters. The quantificational proportion relations,between these key structural parameters and yon Mises maximum stress of cylinder head, can provide a good help for the cylinder head‘s structural design. 相似文献
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Using the method of the pareter study, some important dimensions of the cylinder head of an internal-combustion engine are analyzed. Under the mechanical load, the variational rules of the von Mises maximum stress on cylinder head are obtained, which are influenced by the thickness of the floor plate, head plate, jobbing sheet, standing partition board, and side plate of inlet port and exhaust port. A hypothesis is verified that there is an ideal matching point ong those above-mentioned main pareters. The quantificational proportion relations, between these key structural pareters and von Mises maximum stress of cylinder head, can provide a good help for the cylinder head's structural design. 相似文献