共查询到20条相似文献,搜索用时 156 毫秒
1.
通过对某汽车涂装厂中的汽车涂装工艺流程的物流分析,在Witness2008仿真平台上;建立汽车涂装工艺仿真模型,并针对此厂不能如期交货的问题,通过优化成红色车身、绿色车身和黄色车身分别一条生产线对此模型进行仿真优化。本文的研究结果可为汽车涂装厂节能降耗,从较大程度上提高机器运行效率,加强汽车涂装厂核心竞争力。 相似文献
2.
介绍了低速载货汽车驾驶室涂装工艺流程及特点,采用锌系磷化及阳极电泳对驾驶室进行前处理及电泳底漆涂装,并介绍了设备的选用及采取的环保措施. 相似文献
3.
4.
汽车涂装质量的高低直接影响到汽车的整体外观品质,伴随着汽车行业的发展和进步,汽车自动化生产技术的越发成熟,汽车涂装生产线的设置基本上利用了电气控制技术,实现高质量的自动化生产,这种技术方式相比较传统的涂装方式,提升了涂装的质量与品质。在本文的分析中,主要阐述当下汽车涂装生产线电气设备控制技术类型以及相关原理,以此为相关领域的工作人员在进行分析的过程中可以很好地了解到技术的操作要点,满足相应的建设需求。 相似文献
5.
6.
在发动机动态试验台上利用高动态测功器实现了汽车行驶时的道路阻力和空气阻力模拟,通过对动力系统各部件(离合器、变速箱、车轮等)转动惯量的模拟实现了整车的惯性阻力模拟,建立了驾驶员模型及实现整车行驶工况的动态模拟.对如何在发动机动态试验台上建立驾驶员模型及不同驾驶员模型的操纵特性对动力系统性能的影响进行了研究.具体包括不同驾驶员模型的操纵特性对汽车起步、换挡品质和汽车动力性影响的研究,并通过发动机动态试验台的试验得出了其影响的规律. 相似文献
7.
汽车涂装工艺可以使汽车所使用的金属元件延长使用年限和防止被腐蚀,此外它还能使汽车所运用的金属外壳或工件变得十分好看,能起到一定的装饰作用.在汽车涂装工艺中起关键作用是前处理和电泳,其中对涂装质量起决定作用的是前处理,前处理也是发挥涂料功能的先决条件.电泳工序是汽车涂装车间的一道关键工序,电泳的好坏能直接影响涂装和面漆的质量,但是电泳的工艺对设备的技术要求高,它的工艺参数不但多而且难以管理.本文通过对汽车涂装工艺的简介人手,从汽车涂装工艺线的流程和机理、汽车涂装组态设计现状、汽车涂装控制组态常用软件及特点三个方面对汽车涂装控制组态设计进行了描述. 相似文献
8.
9.
10.
11.
Test is one of methods to acquire human-seat pressure distribution in driving, with the deficiency of being uneasy to obtain the stress information of soft tissue inside human body and the sheer force of interface between human and seat, which can be obtained by simulation. But current simulation method focuses mainly on calculation itself other than combining it with posture prediction and cab packaging parameters, which cause it difficult to acquire accurate pressure calculation results without accurate posture of human body, and make it almost meaningless to design optimization. Therefore, a human body geometric model with posture change capability is built and linked up with Cascade Prediction Model(CPM), which takes cab packaging parameters as inputs. A detailed finite element model of driver human body is constructed and used to conduct the driver-seat interaction simulation between human body and seat. Good accordance of pressure distribution is observed between simulation and test, which validates the simulation. In addition to the distribution pattern, curves on key sections are used to analyze the pressure and shear stress on the seat surface, as well as soft tissue stress inside human body. The simulation shows that the maximum stress of buttocks locates under the ischial tuberosity, and the maximum stress of trunk occurs near the scapula posterior and the lower waist. These are the places where fatigue usually occurs. The maximum pressure of seat appears at the driver-seat contact area corresponding to the driver's maximum skin tissue stress. In order to guide the seat design and cab packaging and study the influence of posture to pressure distribution, finite element models for different levels of cab packaging parameters are created by using CPM. The pressure distributions are calculated and their tendencies varying with cab packaging parameters are obtained. The method presented provides a new way to accurately simulate the interaction between driver human body and seat, and to guide the seat design and cab packaging so as to improve seating comfort. 相似文献
12.
13.
14.
15.
对美国多蕾纳电站的金属蜗壳设计中,保证蜗壳三维模型具有较高的光滑性是一个非常必要的环节。因此,本文在蜗壳三维模型建立完成之后,对构建的模型,进行了流场数值仿真。根据仿真的流态情况,验证了模型设计的合理性,为后续模型的展开、下料,生产奠定了理论依据。 相似文献
16.
通过对100QJ 3.2型高速深井离心泵在不同网格数、不同湍流模型、不同模拟级数条件下进行三维定常数值模拟,分析了不同条件对其性能的影响,从而选出合适的数值模拟设置方法。将性能预测结果与样机试验结果对比,验证利用CFX软件预测高速深井离心泵性能的可行性。结果表明:采用叶轮网格数为40万、Standard k-ε湍流模型、两级全流场模型对高速深井离心泵进行全流场三维定常数值模拟最为合适。 相似文献
17.
为了抑制在路面激励下某型重卡驾驶室的振动加速度响应,研究基于磁流变阻尼器驾驶室半主动悬置系统的控制方法。建立了重卡驾驶室半主动悬置集中质量动力学模型,分别采用比例积分微分(proportion integration differentiation,简称PID)控制理论和模糊最优控制理论设计控制器,并利用磁流变阻尼器动力特性实验数据对模糊最优控制器的参数进行优化。以驾驶室质心垂直、侧倾及俯仰3个方向加速度为控制目标,利用ADAMS/Simulink联合仿真方法,对比分析PID控制和模糊最优两种控制策略与被动状态下重卡驾驶室悬置振动控制效果。针对实际重卡进行不同速度路面激励下的振动控制实验。仿真和实验结果表明,采用PID和模糊最优控制方法均能有效抑制重卡驾驶室半主动悬置的振动加速度响应,其中模糊最优控制效果总体优于PID控制。 相似文献
18.
Suresh Alapati Sangmo Kang Yong Kweon Suh 《Journal of Mechanical Science and Technology》2009,23(9):2492-2501
We present a numerical simulation of two-phase flow in a three-dimensional cross-junction microchannel by using the lattice
Boltzmann method (LBM). At first, we validated our LBM code with the velocity profile in a 3-dimensional rectangular channel.
Then, we developed a lattice Boltzmann code based on the free energy model to simulate the immiscible binary fluid flow. The
parallelization of the developed code is implemented on a PC cluster using the MPI program. The numerical results of two-phase
flow in the microchannel reveal droplet formation process, which compares well with corresponding experimental results. The
size of droplet decreases with increase of the flow-rate ratio and the capillary number. The movement of a droplet through
the microchannel induces three-dimensional circulating flow inside the droplet. This complex flow is thought to enhance the
mixing and reaction of reagents. 相似文献
19.
以化学气相沉积Co-Re合金涂层为对象,建立反应室内部数学模型采用计算流体力学CFD方法对化学气相沉积制备Co-Re合金涂层反应室进行三维数值模拟分析,前处理采用ICEM软件划分网格,在fluent15.0中计算了反应室中基底附近流场分布,数值模拟采用非交错网格系统SIMPLE算法,以提高涂层表面均匀性为目的,研究了不同进气口形状、位置、流量大小以及压力对基底附近速度场的影响,模拟结果表明当选用直型喷头、进气口距离基底下表面L为150mm时,进气流量为150mL/min能够得到表面质量相对均匀的涂层,并且压力的变化对基底附近速度场影响不大。 相似文献