搜索结果: 1-15 共查到“知识库 机械设计其他学科”相关记录29条 . 查询时间(5.518 秒)
标准解读《注浆式螺旋桩基础设计与施工规范》
中国电工技术学会 注浆式 螺旋桩基础设计 施工规范
2022/6/17
中国电工技术学会团体标准T/CES 089-2021《注浆式螺旋桩基础设计与施工规范》由国网江苏省电力有限公司连云港供电分公司牵头编制完成。该标准对注浆式螺旋桩基础设计与施工的基本原则和方法、架空电力线路杆塔的注浆式螺旋桩基础设计与施工进行了规范性要求，填补了国行标在该领域空白。该标准可解决连云港地区海相软土地基存在的问题，具有重大的社会、经济和生态效益。
生测喷雾塔特点：WPSH-500D型生测喷雾塔和3WPSH-500E型potter喷雾塔主要用于农药生物测定。系统以最佳喷雾方式、简捷快速地对作物进行微量精确定量均匀喷雾，农药在作物靶标上的喷雾沉积量均匀一致，测试数据重复性、同一性强，提高生效检测数据的可靠性。整体密封性能好，对操作人员无任何农药污染，且具有自清洗能力。3WPSH-500D型生测喷雾塔以液力喷雾方式对作物以多种不同喷雾角度（如顶喷...
光电信号与收割机谷物产量数据转换模型的构建与验证
联合收割机 双阈值滤波 产量转换模型
2017/11/15
为了准确获取联合收割机作业过程中的谷物产量信息，自主研发了基于光电漫反射原理的联合收割机谷物产量计量系统。系统主要由传感器模块、数据采集模块、GPS模块和谷物产量计量显示终端组成。在研究了联合收割机田间工作状态和籽粒升运器刮板谷堆近似模拟形状的基础上，提出了分段式光电信号与收割机谷物产量数据转换模型。同时为了进一步消除收割机作业过程中产生的奇异点数据，提出了基于籽粒升运器转速的双阈值动态均值滤波的...
Predicting the Performance of a Design Team Using a Markov Chain Model
New product development optimization organizational decision processes organizational design Queuing/Markov analysis
2016/5/18
When faced with a complex design problem, a design team may separate it into subproblems. We would like to know when this approach is superior and how subproblems shouldbe assigned to team members. We...
针对自升式钻井平台现有冲桩系统存在的问题,提出了一种冲桩系统改造方案,利用液压机构控制冲桩系统,能将所有冲桩喷嘴打开后同时冲桩。研究结果表明,该系统的冲桩能力明显得到提升,减小了拔桩阻力,从而达到提高拔桩效率和进一步保证平台结构安全性的目的。
Stability Analysis on Rotor Systems Supported by Self-acting Tilting-pad Gas Bearings with Frequency Effects
bearing-rotor system tilting-pad bearing logarithm attenuation rate
2011/8/4
The recent research on stability of gas bearing-rotor systems still mostly adopts the same method as in oil-lubricated bearing-rotor systems. The dynamic coefficients of gas bearings in the case that ...
Dynamic Feedforward Control of a Novel 3-PSP 3-DOF Parallel Manipulator
parallel manipulator dynamic feedforward control high-speed hybrid machine tool
2011/8/4
Parallel manipulators with less than six degrees of freedom (DOF) have been increasingly used in high-speed hybrid machine tools. The structural features of parallel manipulators are dynamic, a charac...
基于遗传算法的锻压机床多目标优化设计方法
锻压机床 优化设计平台 遗传算法 多目标优化
2012/3/1
提出了一种基于遗传算法的锻压机床优化设计方法,并基于该方法开发了一个以多目标参数优化系统为核心的优化设计平台。该设计平台综合运用了Pro/E的建模及分析计算能力和MATLAB的数学分析处理能力,使得在该优化平台上进行的优化设计既可以保证以精确的实体模型的分析结果为指导,又能基于遗传算法进行多参数多目标协同优化,从而提高了锻压机床的设计效率和优化效果。以某锻压机床为实例,验证了该平台的有效性和可靠性...
Optimal Design of Bicycle Frame Parameters Considering Biomechanics
bicycle design biomechanics muscle fatigue feature parameters of the rider
2011/8/4
With the development of technology and the change of market demands, the trend in middle and high grade bicycle manufacturing is developed toward smallvolume,multispecies,and customeroriented producti...
Precise position control using shape memory alloy wires
Shape memory alloy wire precise control smart materials computer simulations experiment
2010/10/12
Shape memory alloys (SMAs) are active metallic ``smart'' materials used as actuators and sensors in high technology smart systems [1]. The term shape memory refers to ability of certain materials to `...
基于Kriging 模型的改进协同优化算法
多学科设计优化 协同优化 Kriging 模型
2010/8/26
为了提高协同优化算法的求解效率,利用Kriging 模型,构造系统级近似优化模型,提出了基于Kriging模型的改进协同优化算法. 该算法采用置信域与均匀设计相结合的方法,完成近似模型的更新;采用序列二次规划算法,完成优化问题的求解. 以经典函数和减速器设计为例,验证了改进协同优化算法. 结果表明:该算法能提高计算效率,在减速器设计中,迭代次数减少50%左右.
Sequencing Mixed-model Production Systems by Modified Multi-objective Genetic Algorithms
mixed-model production system sequencing parallel machine buffers
2011/8/3
As two independent problems, scheduling for parts fabrication line and sequencing for mixed-model assembly line have been addressed respectively by many researchers. However, these two problems should...
针对制动盘内外侧壁厚不等的通风盘式制动器,基于实测制动副摩擦系数—相对速度试验数据,建立了3维瞬态热机耦合理论模型及有限元模型,分析了紧急制动工况下制动盘瞬态温度场和法向应力场在径向、周向和法向的分布特征,以及制动盘侧面热弹性变形和厚薄差变化规律.在台架试验中利用热电偶和非接触式位移计测量了制动盘表面温度和热弹性变形,仿真计算结果与试验结果具有良好的一致性.研究结果表明:制动盘瞬态温度、法向应力、...
BUILDING INSTITUTIONAL FRAMEWORK FOR SUSTAINABLE DEVELOPMENT IN MONTENEGRO
sustainable development council strategy national best practices
2010/12/2
There are many proofs confirming the importance of sustainable development for Montenegro. Shared international challenges, global economic crisis, and, particularly, the country's natural characteris...
Half-shaft undercarriage systems – designing and operating problems
Cad/Cam Constructional design Materials Metallography
2009/12/14
Purpose: The paper discuss designing and operating problems of half-shafts undercarriage systems of open pit machines. Example of failure of such system and investigation of its reasons are presented....