共查询到18条相似文献,搜索用时 62 毫秒
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为了提高某载货车车架的力学性能并减轻重量,将可靠性理论引入车架结构的优化设计。考虑了多种行驶工况的冲击载荷对车架的破坏作用,给出多工况条件下拓扑优化结果,建立满足各总成的布置和实际行驶要求的新设计结构,基于结构可靠性和有限元法对新设计车架的结构参数进行了可靠性优化设计。理论分析和车架的实际应用情况表明,该车架设计合理,说明该优化设计方法进行车架结构设计的有效性和可行性,为结构优化设计提供一种思路。 相似文献
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提出了车架传统设计的不足,利用ANSYS软件,首先对车架进行拓扑优化得到各梁的大致分布位置,再对各横梁进行形状尺寸优化,使得在满足强度要求下用料最省,最后再进一步对车架进行拓扑优化,并对最终的模型进行强度校核。 相似文献
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对某货车车架进行有限元分析,通过有限元法和试验验证该车架存在局部应力过大的问题,但是整体可进行轻量化改进,利用拓扑优化理论进行优化分析,根据优化结果和生产实际,给车架增加一根横梁以消除其应力集中现象;根据静态灵敏度分析确定弯曲应力和体积对厚度的灵敏度,并找出敏感部位,通过优化计算提出轻量化修改方案。 相似文献
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以多工况下的柔度(静态)和振动固有频率(动态)为目标函数,对某越野车车架进行多目标拓扑优化。依据固体各向同性惩罚(SIMP)理论,采用带权重的折衷规划法建立多工况、多目标优化模型,通过迭代计算得到新的越野车车架。通过仿真分析表明新车架能同时满足静态柔度最小和低阶振动频率最高的要求。 相似文献
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回顾了混合增减制造、面向混合增减制造的拓扑优化的最新发展,以及面向混合增减制造的拓扑优化中存在的权衡关系,还讨论了这些主题的挑战和未来趋势.希望能够激励学术界为连接多目标拓扑优化(MOTO)和混合增减制造做出更多贡献. 相似文献
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通过建立汽车悬架的三维运动模型,运用COSMOSmotion进行动力学仿真,获取零件结构优化所需的载荷条件,以上摆臂为例,在HyperWorks中建立拓扑优化模型,确定设计区域,并针对摆臂的不同制造工艺,采取相应的制造约束条件,采用多工况单一目标的方案,基于伪密度法对摆臂的结构进行拓扑优化,实现了摆臂的概念设计目标。 相似文献
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Optimization for Vehicle Suspension II: Frequency Domain 总被引:4,自引:0,他引:4
J.M. Del Castillo Research Assistant P. Pintado Assistant Professor F.G. Benitez Professor 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》1990,19(6):331-352
The objective of this study is optimizing the components design of a vehicle suspension system under excitation due to road roughness. The vehicle is modelled as a dynamic system made of masses interconnected by, linear, springs and dampers. The optimizing code provides values corresponding to the caracteristics of masses, dampers and springs which, within a range, minimize the objective function for a defined excitation. This objective function auantifies the vehicle comfort level.
The optimization method used is the sequential linear programming by iteratively applying the Simplex algorithm. The model response is obtained in frequency domain and the vehicle excitation can be either random or deterministic.
The exact nature of the optimization problem, objective function and restrictions, depend on the type of excitation considered.
In succeeding paragraphs, the problem formulation together with a comparison with other authors is presented. 相似文献
The optimization method used is the sequential linear programming by iteratively applying the Simplex algorithm. The model response is obtained in frequency domain and the vehicle excitation can be either random or deterministic.
The exact nature of the optimization problem, objective function and restrictions, depend on the type of excitation considered.
In succeeding paragraphs, the problem formulation together with a comparison with other authors is presented. 相似文献
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《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2012,50(5):273-288
SUMMARY A numerical procedure for finding the optimum values of a number of parameters describing a model vehicle suspension has been studied. The vehicle has been modelled by dynamic systems of linear springs and dampers, and the goal is to obtain lower acceleration peaks at an elected design point in the vehicle. The problem is stated as a mathematical programming problem which can be solved by means of the sequential linear programming technique. The procedure has been implemented for a four wheel independent suspension model capable of being subjected to road irregularities and to centrifugal and braking accelerations. 相似文献
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Optimization for Vehicle Suspension I: Time Domain 总被引:4,自引:0,他引:4
P. Pintado Assistant Professor F.G. Benitez Professor 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》1990,19(5):273-288
A numerical procedure for finding the optimum values of a number of parameters describing a model vehicle suspension has been studied. The vehicle has been modelled by dynamic systems of linear springs and dampers, and the goal is to obtain lower acceleration peaks at an elected design point in the vehicle.
The problem is stated as a mathematical programming problem which can be solved by means of the sequential linear programming technique. The procedure has been implemented for a four wheel independent suspension model capable of being subjected to road irregularities and to centrifugal and braking accelerations. 相似文献
The problem is stated as a mathematical programming problem which can be solved by means of the sequential linear programming technique. The procedure has been implemented for a four wheel independent suspension model capable of being subjected to road irregularities and to centrifugal and braking accelerations. 相似文献
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将拓扑优化方法扩展至离散空间,采用板件优化后的某轻型商用车车身模型进行焊点拓扑优化和联合拓扑优化,并采用优化后的焊点分布进行车身静、动态分析.结果表明,在焊点数量不变的情况下,拓扑优化可提高车身刚度10%以上;通过板件厚度与焊点拓扑联合优化,可减轻车身质量29%. 相似文献
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商用车发动机在怠速和工作中会产生较大的振动和噪声,分析其相关零部件的振动特性就显得尤为重要。发动机电子泵支架属于铸造块体结构,运用Altair公司的OptiStruct优化分析软件中的拓扑优化分析(Topology Optimization)方法,在满足最低设计频率的要求下,对某型号发动机电子泵支架进行了拓扑优化分析,根据优化分析结果确定其材料的合理布局方式,最终在满足设计要求的情况下成功确定合理、经济的设计方案。 相似文献