摘要：Four-dimensional(4D)printing is an advanced form of three-dimensional(3D)printing with controllable and programmable shape transformation over *** are used as a controlling factor with multi-stage shape recovery,with emerging opportunities to customize the mechanical properties of bio-inspired *** print pattern of shape memory polymer(SMP)fbers strongly afects the achievable resolution,and consequently infuences several other physical and mechanical properties of fabricated ***,the deformations of bio-inspired structures due to actuator layout are more complex because of the presence of the coupling of multi-directional *** this study,the initial structure was designed from closed-shell behavior and divided into a general unit and actuator unit,the latter responsible for driving the *** stress confrontation between the actuator and the general unit was considered in the layout thermodynamic model,in order to eliminate the transformation produced by the uncontrolled shape memory behavior of the general *** critical and efective strategies for the layout design of actuators were proposed and then applied to achieve the desired accurate deformation of 3D-printed bilayer ***,the proposed approach was validated and adopted for fabricating a complex shell-like gripper structure.

摘要：复杂产品的拓扑优化设计可以显著节省材料和节能,有效地降低惯性力和机械振动。本研究以一种大吨位液压机作为典型的复杂产品,用于阐述该优化方法。本文提出了一种基于可靠性与优化解耦模型和基于教学学习的优化(TLBO)算法的可靠性拓扑优化方法。将由板结构形成的支撑物作为拓扑优化对象,重量轻、稳定性好。将不确定性下的可靠性优化和结构拓扑优化协同处理。首先,利用有限差分法将优化问题中的不确定性参数修正为确定性参数。然后,将不确定性可靠性分析和拓扑优化的复杂嵌套解耦。最后,利用TLBO算法求解解耦模型,该算法参数少,求解速度快。TLBO算法采用了自适应教学因子,在初始阶段实现了更快的收敛速度,并在后期进行了更精细的搜索。本文给出了一个液压机基板结构的数值实例,说明了该方法的有效性。

摘要：Traditional modular design methods lead to product maintenance problems, because the module form of a system is created according to either the function requirements or the manufacturing considerations. For solving these problems, a new modular design method is proposed with the considerations of not only the traditional function related attributes, but also the maintenance related ones. First, modularity parameters and modularity scenarios for product modularity are defined. Then the reliability and economic assessment models of product modularity strategies are formulated with the introduction of the effective working age of modules. A mathematical model used to evaluate the difference among the modules of the product so that the optimal module of the product can be established. After that, a multi-objective optimization problem based on metrics for preventive maintenance interval different degrees and preventive maintenance economics is formulated for modular optimization. Multi-objective GA is utilized to rapidly approximate the Pareto set of optimal modularity strategy trade-offs between preventive maintenance cost and preventive maintenance interval difference degree. Finally, a coordinate CNC boring machine is adopted to depict the process of product modularity. In addition, two factorial design experiments based on the modularity parameters are constructed and analyzed. These experiments investigate the impacts of these parameters on the optimal modularity strategies and the structure of module. The research proposes a new modular design method, which may help to improve the maintainability of product in modular design.

摘要：Product customization has been recognized as an effective means to implement mass cus-tomization （MC）. A new theory and method for MC-oriented evolutionary design of configuration product is presented based on the study of developing law of evolutionary design in integrated envi-ronment, which focuses on the innovation and reuse properties of configuration product. The key technologies for general requirement modeling in quick response to customer requirement, multi-level stepwise configuration optimization driven by customer requirement and evolutionary deduction of product variable structure based on configuration association are thoroughly investigated. The suc-cessful application of the presented method in the development of real-life products demonstrates its utility, flexibility and robusticity.

摘要：零件结构是几何元素与附着于几何元素之上设计意图的综合体,如何有效地实现两者统一表示是零件结构进化设计技术研究的一个重要问题。在以联结单元定义实现结构联结约束抽象表达基础上,采用联结语义关联图给出面向进化设计的零件结构模型表示,提出了面向过程进化的联结单元运算操作方法,将进化运算和结构进化模型重构的联动式进化算法相结合,实现零件结构进化模型动态编辑。

摘要：By considering the characteristics of information generation of chemical industry product configuration model,a new method of constructing chemical equipment configuration model based on axiomatic design theory was *** this method,functional domain mapping into physical domain was introduced,functional requirements with constraints were defined as function constraint integrated component(FCIC),design parameters with feature were defined as structure feature integrated component(SFIC),and the configuration model based on SFIC was constructed by establishing database and the characteristic relationship of SFIC *** design made configuration modeling more scientific,and helped the designer decide more quickly and ***,a case study of configuration design for air separation equipment was presented.

摘要：基于产品平台技术,提出了基于混合进化算法的参数化产品族递进式优化设计方法.建立了参数化产品族的递进式优化设计流程,提出改进的强度Pareto进化算法(SPEA2+)与非支配排序遗传算法(NSGA-II)相结合的多目标混合进化算法对参数化产品族设计问题进行优化,混合进化算法使用了两类种群进行求解,解决了同步进化带来的数据扰动问题.在参数化产品族递进式优化设计过程中,首先优化产品族设计平台,建立参数化产品族设计问题的多目标优化数学模型,通过产品设计参数的敏感度分析和变差指数计算,划分产品平台的设计常量和设计变量,形成稳健的产品平台来获得最优参数.然后对产品族中实例产品的多个性能进行优化,在已有的产品平台基础上,优化设计变量的取值.最后,以电动机产品族的递进式优化设计过程为例证明了该方法的有效性和适用性.

摘要：将产品广义性能作为驱动整个机械产品方案设计过程的有效工具,利用'对象结构'公理推导并结合'P-E'体系给出了产品广义性能的定义,将产品广义性能划分为结构性能和行为性能两类。针对两类广义性能分别进行形式化表述,构建产品广义性能相关的产品符号模型。提出一种广义性能驱动的机械产品方案设计方法,分析性能结构映射可能出现的理想映射、冗余映射和耦合映射关系,给出广义性能驱动机械产品方案设计的过程图解与算法。以注塑机产品重要组成部分之一的注射装置方案设计为例,说明该方法在实际机械产品方案设计中的应用,证明了该方法的正确性、有效性与实用性。

摘要：在建立可调节产品族优化模型的基础上,基于独立优化、平台规划、实例产品设计和方案评价的产品族自底向上设计流程,提出基于敏感度分析和模糊聚类的产品族优化再设计方法.在产品平台规划阶段,首先使用变量敏感度分析初步划分可能的平台常量和可调节变量集合;然后对实例产品间由于变量通用所造成的性能、成本和约束满足变化进行模糊C均值聚类,并引入模糊覆盖指数决定最优的聚类数目,合理规划多平台常量的共享.通过建立平台非通用性指数以定量评价产品族方案的通用程度.最后采用通用电机产品族的再设计实例,证明了该方法的正确性与高效性.

摘要：针对产品配置设计过程中存在的客户和设计者之间交互语义一致性以及功能域与结构域之间映射等问题,鉴于事物特性表技术,通过规定产品信息的数据格式使产品数据能在不同系统之间进行交流,提出了基于事物特性表的产品需求信息元方法,构造了面向配置设计的功构模型;着重探讨了模型的优化算法及基于功构模型的产品配置设计流程;最后给出了面向配置设计的产品功构建模应用实例·