共查询到18条相似文献,搜索用时 156 毫秒
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本文以车辆座椅的靠背曲面作为研究对象,目的在于寻求一种更加适合人体背部曲面的座椅方案以提高现有车辆座椅舒适度。综合运用人机工程学、三次均匀B样条曲线能量法和机械工程的多学科优化理论,设计出符合人机工程学且曲面光顺的车辆座椅。利用MATLAB软件对曲面曲率进行有限元分析和优化,根据优化后的曲面建立车辆座椅的虚拟模型。 相似文献
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《电子制作.电脑维护与应用》2017,(12)
以某型地铁塞拉门为研究对象,主要针对门扇的结构进行研究,通过ANSYS对门扇进行结构静强度的仿真计算分析,预测结构的变形量、可能的危险区域,从而对车辆门扇的优化和设计提供理论依据。 相似文献
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为实现地铁车辆转向架的轻量化设计,参照国际标准UIC 615-4,计算某地铁车辆转向架构架的主要载荷.将垂向载荷、横向载荷和纵向载荷等6种载荷组合成5种超常载荷工况,经有限元强度分析,找出应力薄弱点.通过优化模型的建立和OptiStruct的优化,实现转向架构架的轻量化设计,总质量减轻约12%. 相似文献
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为了改善农用车、工程车等车辆座椅的减振性能,以电磁作动器为执行器,建立人体座椅—车辆两自由度的主动座椅悬架系统模型。通过对该系统的动力学模型进行线性化处理,并应用二次型最优控制理论,选取合适的加权系数,实现系统的最优控制。在Matlab/Simulink中以白噪声路面激励为系统输入,对主动控制和被动控制的座椅悬架系统仿真分析。结果表明:在不同的激励条件下,基于电磁作动器的主动座椅悬架系统减振效果显著,大幅降低了驾驶员所承受垂直振动加速度,提高了车辆的乘坐舒适性和操纵稳定性。 相似文献
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刘非 《数码设计:surface》2021,(5)
当前地铁中的车辆网络系统是非常关键的,随着国家越来越重视地铁列车的研究工作,地铁车辆网络控制以及诊断系统也得到了逐渐的完善和健全。因此,当前需要对地铁车辆诊断系统进行不断地探究,能够将其中的问题能够及时发现,并且妥善解决,这样才可以保证从根本上提高地铁车辆的运行效率。本文主要结合地铁车辆运行的实际状况,进一步研究地铁车辆网络控制以及诊断系统。 相似文献
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履带车辆乘座舒适性的建模与仿真 总被引:1,自引:0,他引:1
通过建立履带车辆"车辆-座椅-人"系统模型,并用MSC Adams软件仿真在典型路面条件下的履带车辆的垂向振动特性,对车辆乘座舒适性进行评价. 同时研究座椅的刚度、阻尼等动态参数对乘座舒适性的影响. 相似文献
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文章论述了采用8051单片机对工程机械车辆司机座椅动态参数进行控制以实现减振的方法与设计。在分析了座椅悬架系统工作特性之后,设置单片机控制的动态参数一阻尼系统ζ在0-1之间接0。618法优化,确定其最优值。文章还对所编制的控制程序作了介绍。 相似文献
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为实现某四旋翼无人机的轻量化结构设计,采用Inspire进行拓扑优化设计,并对获得的拓扑优化结构进行静力分析和动力学分析。分析结果表明,通过拓扑优化方法获得的无人机结构应力分布合理,结构位移小且频率较高,满足静态和动态结构设计要求。研究结果可为实现低成本、轻量化的四旋翼无人机结构设计提供一条新的途径。 相似文献
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Automobile seat greatly affects the ride comfort of drivers in a prolonged driving. Not only the layout parameters of automobile seats, such as seat height, cushion inclination angle, backrest inclination angle, etc, but also the backrest surface related with lumbar support all affect the seating comfort. The human body-seat system includes the three-dimensional data of body based on anatomy and anthropometry, three-dimensional data of seat and adjustable assembly interaction between body and seat based on human body kinematics. Body height and driving posture are adjusted in POSER software, then the solid model of human skin, skeleton and muscle are created in ANSA software, and the integrated model of body-seat system is created in ABAQUS software. The adjustment of the lumbar support parameters is achieved by setting boundary condition of lumbar support region of seats. The finite element model of human body-seat system is validated by comparison to available literature results. At last the finite element model is applied to analyze the effect of lumbar support parameters of seats on the interaction between body and seat under the action of gravity. The pressure value and distribution, contact area, total force of backrest and intervertebral disc stress are obtained. The result shows that the optimal thickness of seat's lumbar support size for the seating comfort is 10 mm after comprehensive comparison and evaluation.Relevance to industry: This study investigated the effects of lumbar support on seating comfort, and can be used to protect the lumbar health. The modeling and simulation method can be applied for the optimization design of vehicle seats. 相似文献
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基于结构拓扑优化方法的发动机支架轻量化设计 总被引:3,自引:3,他引:0
为实现某发动机支架轻量化设计,在支架总成整体结构有限元分析的基础上,运用等效刚度原则建立支架局部有限元模型,得到不同工况下的支架位移分布结果.基于TOSCA软件,通过提取结构分析结果对支架结构拓扑优化模型进行敏度分析并形成优化模型列式.优化求解后,在每轮循环迭代中将新的单元密度值重新赋予结构模型,直至满足预先给定的收敛判定条件;设置过滤半径和各类制造加工约束,消除结构拓扑优化中的数值不稳定性问题,改善优化结果的可加工性.对优化前后的计算结果进行对比分析. 相似文献
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Automotive applications of topology optimization 总被引:1,自引:0,他引:1
Topology optimization is used for obtaining the best layout of vehicle structural components to achieve predetermined performance goals. An in-house topology optimization software, TOP, has been developed to analyse important automotive components. The topology design problem is formulated as a general optimization problem and is solved by the mathematical programming method. The MSC/NASTRAN finite element code is employed for response analyses. The use of MSC/NASTRAN is significant, because it not only allows engineers to use a wellaccepted and widely-used finite element code with no size limit on the model, but also permits developers to concentrate on the rest of the topology optimization program. Three automotive examples including a simplified truck frame, a deck lid, and a space frame structure are presented. 相似文献
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Digital human modeling is an essential tool to reduce cost and to save time in a design process where humans take the part of users of the design. Considering this phenomenon for a vehicle interior, the importance of the seat track location and adjustment ranges become important. This paper presents the effect of driver and vehicle interaction on vehicle interior layout based on simulation approach. This simulation method includes two optimizations. The first optimization problem is the physics-based seated posture prediction. In order to represent physical drivers, 4,500 virtual drivers are generated based on an anthropometric database-ANSUR. Interaction forces between the digital human and pedal, seat, ground, and steering wheel are incorporated in the physics-based posture prediction. Three different pedal reaction moments (0, 20, and 40 N m) are implemented into the formulation to examine the effect of pedal reaction moment on driver seat location and adjustment ranges. To study the effect of shear forces, the physics-based posture prediction is compared to kinematics-based posture prediction. After posture predictions are completed, individuals' preferred seat locations are used in a second optimization problem to predict the seat track location and adjustment ranges. For a specific vehicle with 20 N m pedal reaction moment, adjustment ranges are predicted as 223 mm and 82 mm in horizontal and vertical directions, respectively. Also, it was shown that shear force due to the interaction between the driver and the seat pan and the pedal reaction moment are both influential to the seat track location and adjustment ranges.Relevance to industryThe simulation model presented in this paper is useful in vehicle and seat design and can be easily used for virtual design assessment in vehicle design. 相似文献