关键词： 机械工程  

ISBN: (纸本)9787111758204

摘要： 本书以Ansys 2024为平台，对应用A nsys进行机械与结构有限元分析的基本思路、操作步骤和应用技巧进行了详细介绍，全书从实际应用出发，结合编者使用该软件的经验，对实例部分的操作过程采用GUI方式逐步进行了讲解。为了帮助读者熟悉Ansys的相关操作命令，在每个实例的后面均列出了分析过程的命令流文件。 全书共10章，第1章为绪论，第2章介绍了Ansys 2024图形用户界面；第3章介绍了建立实体模型，第4章介绍了ANSYS分析基本步骤，第5章介绍了静力分析，第6章介绍了非线性分析，第7章介绍了动力学分析，第8章介绍了热分析，第9章介绍了参数化与单元的生和死，第10章介绍了子模型。

关键词： Multiobjective optimization  

摘要： Due to the complexity of the mathematical models of aerodynamics and control, it is a challenge inherent in the traditional serial design process to fully account for their multi-objective optimization. To address the challenge, a method for aerodynamic control coupling optimization tailored to high-speed vehicles is proposed. Leveraging the surrogate-based optimization (SBO) algorithm, this approach integrates the principles of active control technology (ACT) with multidisciplinary design optimization (MDO) techniques to establish an aerodynamic control coupling multi-objective optimization process for high-speed vehicles. Under Mach 2 flow conditions, aerodynamic control coupling optimization studies are conducted on a double-cone model equipped with control surfaces to enhance the aerodynamic performance and control capability of the vehicles. The results reveal that after aerodynamic control coupling optimization, the optimal model demonstrates a 0.401% increase in lift coefficient and a 2.999% improvement in lift-to-drag ratio in the supersonic environment. Additionally, there is a reduction of 2.769% in overshoot and 0.655% in control gain. These enhancements in aerodynamic performance and control capability affirm the viability of the coupling strategy. Furthermore, the optimal model streamlines subsequent control system design, thereby enhancing overall vehicle design efficiency. The aerodynamic/control coupling optimization design method proposed in this paper serves as crucial technical support for the advanced design of high-speed vehicles. © 2024 Xi'an Jiaotong University. All rights reserved.

关键词： ABAQUS   circular tube forming   hardening model   multi-point roller   secondary development  

摘要： A new multi-point roller flexible roll forming process of circular tube with different sizes using the same set of rollers was proposed, and finite element simulation of the process was carried out. Because the finite element modeling process needs to assemble a large number of rollers and set related attributes, which is tedious and error-prone, so the pre-processing secondary development of the forming process was carried out in ABAQUS nonlinear finite element software based on Python language. The automatic finite element modeling of roller drawing, material properties, boundary conditions, operations and other properties of circular tube with different forming sizes was realized, which greatly improves the efficiency and accuracy of finite element simulation modeling. Aiming at the process of repeated loading, unloading and reloading of materials in circular tube forming process, the circular tube model with different forming process parameters was adjusted and generated based on the developed pre-processing plug-in, and the influence of isotropic hardening model and kinematic hardening model on the simulation of multi-point roller flexible roll forming of circular tube was analyzed. It is found that the simulation results of multi-point roller flexible roll forming of circular tube with the kinematic hardening model are more consistent with the objective forming shape. © 2024 Beijing Res. Inst. of Mechanical and Elec. Technology. All rights reserved.

关键词： 有限元分析  

ISBN: (纸本)9787111759294

摘要： 本书基于ANSYS Workbench软件平台，详细介绍结构动力学仿真分析计算方法和技术应用。首先讲解了ANSYS Workbench工程数据、网格划分、Mechanical通用设置的使用方法，然后对基本模态分析、循环对称模态分析、谐响应分析、线性扰动分析、子结构CMS法分析、响应谱分析、随机振动分析、刚体动力学分析、瞬态动力学分析、显式动力学分析、转子动力学分析、拓扑优化与设计、疲劳分析等各种分析类型一进行说明。对每种结构动力学分析类型的讲解中，首先介绍其基本理论，其次对ANSYS Workbench相关分析模块的仿真建模方法、分析设置流程中的具体选项进行详细说明，最后给出相应的结构动力学工程案例进行操作流程演示和结论评价。

关键词： 有限元分析  

ISBN: (纸本)9787111759461

摘要： 本书共10章, 包括耦合场分析简介、直接耦合场分析、直接耦合场实例分析、多场 (TM) 求解器MFS单代码耦合、使用代码耦合的多场求解分析、多场求解器MFS单代码的耦合实例分析、载荷传递耦合物理分析、载荷传递耦合物理场实例分析、耦合物理电路分析和耦合物理电路模拟实例分析。

关键词： 热力学  

ISBN: (纸本)9787111758679

摘要： 本书以Ansys 2024为平台, 对Ansys热分析和与热相关的耦合场分析的基本思路、操作步骤和应用技巧进行了介绍, 并结合工程应用实例讲述了Ansys的具体使用方法。本书实例部分采用GUI方式, 逐步讲解了操作步骤, 在每个实例的后面列出了分析过程的命令流文件。

关键词： 螺栓联接   三维分形   弹塑性接触   结合面刚度   有限元分析   实验研究  

摘要： 为更准确地分析螺栓联接体的静动态特性,根据三维分形理论,考虑微凸体弹塑性接触在内的4种变形阶段,分别得到螺栓联接结合面的法向载荷与切向载荷,进而建立了螺栓联接结合面法向刚度与切向刚度模型,并分析了各参数对螺栓联接结合面刚度模型的影响关系。开展了有限元分析与实验研究,应用所建立的法向刚度与切向刚度模型,将考虑结合面影响的螺栓联接体有限元分析结果分别与忽略结合面影响的螺栓联接体有限元分析结果以及实验结果对比。研究结果显示,增大预紧力、工作载荷、分形维数、材料特性参数,或是减小分形尺度参数,可增大螺栓联接结合面的刚度;应用所建立结合面刚度模型的螺栓联接体有限元分析结果与实验结果误差在8%以内,远小于忽略结合面影响的有限元分析误差。