基于拓扑优化的举高消防车转台轻量化设计

针对某举高消防车转台材料冗余的问题,利用ANSYS中拓扑优化模块对举高消防车转台进行结构优化,在保证结构刚度、强度、稳定性要求的前提下,优化后转台减重26%,为举高消防车整车提供了设计余量,同时提升了整车经济性。     

驱动电机转子结构优化分析

对某电动车的驱动电机转子进行了结构强度分析,针对强度分析结果进行结构拓扑优化和形状优化分析,优化后方案与原方案相比减重18.8%。仿真和试验结果表明优化后的电机转子各项性能满足设计要求。     

基于拓扑优化的扭力梁式轿车后桥结构轻量化设计

在某轿车原扭力梁后桥的基础上,建立了扭力梁式后桥的结构力学模型,具体分析了原车后桥的模态及在静止、制动或启动及侧翻工况下的强度。在此基础上进行原车后桥的拓扑结构轻量化设计,通过在原后桥的基础上获得后桥空间设计域及非设计域,定义设计目标、设计函数、加载条件及响应,迭代计算获得了最佳的结构拓扑方案。根据结构拓扑优化的最终结果,通过CAD重构获得了拓扑结构轻量化的后桥设计。模态及强度计算结果显示,优化后的后桥前三阶模态频率较原后桥有大幅减小,不同工况下后桥的应力分布更趋合理,在设计域内及安装位置不变的条件下,新后桥的质量由原后桥的19.06 kg减少到17.67 kg,减重7.29%。     

双前轴车辆Ⅱ簧前支架CAE分析

本文通过对某双前轴车辆的Ⅱ簧前支架进行强度有限元分析,结果显示该支架的强度完全满足设计要求。应轻量化要求,对原支架进行拓扑优化,优化后的支架在满足结构强度的同时,成功减重2kg,达到轻量化目标。     

某商用车驾驶室内饰件的轻量化设计

对某商用车驾驶室地毯和上、下卧铺3个主要内饰件进行轻量化设计:在不改变装饰性和不增加车内噪声的情况下,地毯减重3.42 kg;对卧铺骨架进行尺寸优化和拓扑优化,对卧铺铺板进行减重设计,在满足上、下卧铺设计要求和使用性能的条件下,共减重12.92 kg。通过实车试验证实了上述轻量化设计方案的可行性,同时车内噪声略有改善。     

某电动客车骨架综合轻量化设计

纯电动客车骨架轻量化对于提升其续驶里程具有重要作用。本文首先基于变密度法对整车骨架进行拓扑结构优化,然后通过灵敏度分析和尺寸优化方法对骨架主要杆件的厚度进行优化。经过综合优化后的某纯电动客车骨架的刚强度性能均有提高,且减重效果明显。     

某小型客车车身骨架轻量化综合优化设计

建立某小型客车骨架的隐式参数化有限元模型,以骨架扭转刚度、弯曲刚度、扭转模态及强度为约束条件,重量最低为目标,选取侧围结构进行局部拓扑优化,然后对骨架型材的截面和壁厚进行尺寸优化.最终,车身骨架实现减重26.7 kg.     

轿车手制动臂总成支座拓扑优化设计

采用拓扑优化技术对轿车手制动臂总成支座进行拓扑优化设计,在满足强度刚度要求的情况下,优化后结构相比原结构重量降低了38.3%.     

基于OptiStruct的某电瓶箱支架优化设计

文章基于Opti Struct软件对某汽车电瓶箱支架进行了拓扑形貌联合优化及尺寸优化,并对优化前后的一阶模态频率、最大应力以及质量进行对比。结果表明,优化后结构的一阶模态频率与原结构相等,最大应力增加5%,但仍处于安全许用范围内,优化后电瓶箱质量比优化前减小23.6%,减重效果明显。     

双横臂悬架上、下摆臂轻量化设计

利用Catia软件对悬架系统进行实体建模,并利用HyperMesh软件进行拓扑优化分析和刚、强度分析,同时结合对未来轻量化材料的探讨,寻找双横臂悬架轻量化设计方法。     

基于拓扑优化的某重卡轮毂轻量化设计

对某重卡前轴轮毂在设计工况下的静强度性能进行了有限元分析,并对该轮毂结构进行了轻量化设计.采用拓扑优化方法,以最大设计空间为优化的基结构,以重量最轻为目标函数,以结构的静强度性能为约束条件,进行了优化迭代计算.轻量化设计后,减轻了轮毂的重量,且轻量化结构满足强度要求.     

基于拓扑优化的某重型车桥桥壳轻量化设计

对某重型车桥桥壳在设计工况下的静强度性能进行了有限元分析,并对该桥壳结构进行了轻量化设计。采用拓扑优化方法,以初始设计作为优化的基结构,以重量最轻为目标函数,以结构的静强度性能为约束条件,进行了优化迭代计算。轻量化设计后,减轻了桥壳的重量,且轻量化结构满足强度要求。     

某重卡下支架有限元分析及轻量化设计

对某重卡下支架在设计工况下的静强度性能进行了有限元分析,并对该下支架结构进行了轻量化设计。采用拓扑优化方法,以最大设计空间为优化的基结构,以重量最轻为目标函数,以结构的静强度性能为约束条件,进行了优化迭代计算。轻量化设计后,减轻了下支架的重量,且轻量化结构满足强度要求。     

重型专用车车架轻量化结构优化设计

采用有限元法结合数学规划法对重型专用车车架进行了轻量化结构优化设计。该优化模型以车架的总重量最小为优化目标,以纵梁各段的板厚为优化设计变量,而以车架的强度值作为优化状态变量进行优化,并对优化后的模型进行刚度校核,最终得到的车架结构在满足强度和刚度要求的前提下,与原结构相比重量减轻约13%,取得了较好的轻量化效果。     

Development of a fiber-reinforced plastic armrest frame for weight-reduced automobiles

This paper presents the design optimization process of a short fiber-reinforced plastic armrest frame to minimize its weight by replacing the steel frame with a plastic frame. The analysis was carried out with the equivalent mechanical model and design of experiment (DOE) method. Instead of considering the whole structure, it is divided into three simpler regions to reduce the complexity of the problem through examining its structural characteristics and load conditions. The maximum stress and deflection of the regions that carry the normal load are calculated by the analytical mathematical form derived from an equivalent model. The other regions loaded by contact stress are handled by FEM (finite element method), the DOE method, and the RSM (response surface model). To optimize the design variables in both cases, the object functions derived from these calculations are solved with a CAE (computer aided engineering) tool. This method clearly shows the mechanical and mathematical representation of structural optimization and reduces the computing costs. After design optimization, the weight of the optimum plastic-based armrest frame is reduced by about 18% compared to the initial design of a plastic frame and is decreased by 50% in comparison with the steel frame. Some prototypical armrest frames were also made by injection molding and tested. The research results fulfilled all of the design requirements.     

Structural design of an outer tie rod for a passenger car

This study proposes a structural design method for an outer tie rod installed in a passenger car. The weight of the outer tie rod is optimized by using the aluminum alloy Al6082M, which is developed as a steel-substitute material, and applying structural optimization techniques. The high strength aluminum with improved mechanical properties was developed to reduce the weight of the outer tie rod. The newly developed aluminum alloy Al6082M is applied as the material of the outer tie rod. The static strength due to inertia force, durability and buckling performances are considered in the structural design of the outer tie rod. At the proto design stage of a new outer tie rod, it is cost-effective to utilize FE (finite element) analysis to predict each of these performances. In addition, the current trend in the structural design of automobile parts is to use optimization techniques to reduce the weights of the parts. First, for an arbitrary base design, the static strength, the life cycle and the buckling load are calculated to check whether the design satisfies its criteria. Then, the critical performance is selected so as to include its loading condition only in the optimization process. In this study, the metamodel based optimization process using kriging is adopted to obtain the minimum weight satisfying the critical design requirement. Then, the feasibility of the determined optimum shape is investigated against the other performances. Finally, the optimum design of outer tie rod is modified by considering forging efficiency. The performances of the final design are investigated through simulation and experiment.     

基于伪密度法的汽车悬架摆臂拓扑优化

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。     

灵敏度分析在铸件优化设计中的应用

在铸件设计时一般都是先经过拓扑优化然后再进行结构设计,但拓扑优化无法得到确定结构的最优尺寸,仅能得到给定边界条件下的基本形式,因此在拓扑优化后如何进行详细尺寸设计对设计者要求较高,有时会设计出很多方案进行强度验证,且这些方案往往不是最优方案。在拓扑优化分析完毕后再加入灵敏度优化技术,可以快速得到满足设计要求且重量最轻结构的详细尺寸,大大提高了设计效率。     

基于遗传算法的提梁机主梁优化设计

以450t偏轨提梁机的主梁为优化对象,以主梁自重为目标函数,采用遗传算法对其进行结构优化,得到提梁机主梁参数的最优解。用有限元分析软件对优化后的提梁机结构进行强度、刚度及稳定性的验证,结果表明：在满足结构设计的前提下,主梁结构自重减少了11．8％,优化效果明显。     

45m混凝土泵车结构强度研究

以45 m混凝土泵车为研究对象,利用ANSYS有限元软件,采用实体单元与接触单元相结合的方法模拟各个臂架之间的连接,用板壳单元和梁单元模拟泵车其余结构,建立了整车有限元模型.分析泵车在3种典型工况下的结构强度,发现混凝土泵车臂架在危险工况局部结构强度不能满足设计要求,通过计算分析提出了结构补强方案.改进后的结构实际使用情况良好.