摘要：Valves are widely used in various working conditions for their flow control functions,and the cavitation inside valves has been investigated owing to its harm to the valve itself and the connecting downstream *** paper presents a comprehensive review of the progress that has been achieved in the past years about cavitation in valves including both mechanical heart valves and control *** review is divided in the following parts,namely the location where there is a high possibility of the occurrence of cavitation,the parameters that affect cavitation intensity,and the methods to minimize cavitation *** should be noticed that although simulation has been widely used,advanced experiments are still needed in order to obtain accurate analysis of cavitation in valves and the cavitation model still needs to be improved.

摘要：研究使用mechanicalDesktop(MDT)软件对中国先进研究堆 (CARR)堆本体主要部件进行三维参数化建模 ,并通过尺寸及相关位置数值的变量驱动进行CARR堆本体初步设计及修改。三维参数化设计方法的应用大大提高了CARR堆本体的设计效率 ,缩短了设计周期 。

摘要：文中通过对射流发电机工作原理、结构特点及作用荷载的分析，建立了射流发电机机械振动系统的动力优化设计数学模型，以结构尺寸为设计变量，使结构重量极小化，满足动力位移、应力响应、基频以及尺寸限等约束条件，利用振型迭加法和复合形法求解。优化和试验结果表明：经优化后，既减轻结构重量，又显著地提高了射流发电机的输出功率。

摘要：The design and implementation of mechanical domestic water meters in current industrial organization and intellectual properties have been registered as an invention to solve the problems of current meters. The device operation includes inquiry of printing, subscription connection and disconnection in an emergency. This system includes a software and hardware parts on the users and the control center connecting with two-way mobile phone. Central control software sends the message through the wireless telecommunication lines to the user’s software, requesting the desired information and also provides the commands needed to be sent through the same. The same information can also be submitted to the control center. Through the same way, some of advantages of this method are as follows: installing on existing meters, cheap cost of inquiry call meter, the possibility of declaring illegal manipulation to the control center, the exchange of information using information encoding, and manipulating digital meters applying minor changes.

摘要：介绍了Autodesk AutoCAD mechanical软件的转动惯量和挠度线的计算功能,并以实例介绍其在货架横梁设计中的应用,对横梁的截面进行惯性矩的计算,并用惯性矩的计算结果计算挠度线和安全系数,提高了计算精度并加快了设计进度。

摘要：介绍了Autodesk公司的AutoCAD mechanical软件及其轴生成器和轴计算的基本功能,介绍了基于AutoCAD mechanical的轴的设计的基本步骤,并以实例介绍了轴的绘制和设计计算的方法,最后讨论了各个设计步骤的注意事项和优缺点。实践表明,采用AutoCAD mechanical可以快捷绘制出机械图样,直观、方便、准确实现轴的设计计算,减少了设计时间,大大提高工作效率,但存在一些缺陷,如强度校核点需要用户自己寻找,结果是否符合要求需要用户自己判断。

摘要：介绍了Autodesk AutoCAD mechanical软件的转动惯量和挠度线的计算功能，并以实例介绍在货架横梁设计中的应用，对横梁的截面进行惯性矩的计算，并用惯性矩的计算结果计算挠度线和安全系数，提高了计算精度并加快了设计进度．

摘要：工程制图模板对于企业规范产品设计十分重要。详细讨论了制图模板的建立方法和系统环境设置,通过模板文件和系统环境设置极大地提高了设计效率。

摘要：在载荷作用下齿轮轴将发生弯曲变形和扭矩变形等弹性变形。利用AutoCAD mechanical~?软件的"轴计算"功能来计算齿轮轴的弯曲变形和扭转变形,将齿宽范围内的相对变形量叠加,合成出齿轮轴的综合变形曲线,从而为齿轮轴的齿向修形设计提供较为准确的数值依据。

摘要：应对市场轻量化趋势,某公司生产的上推力杆支架需要在保证产品性能的前提下进行轻量化改进。本文首先运用Pro/e建立上推力杆支架的整体模型,再运用Pro/Mechanica计算改进后的模型强度。结果表明,改型结构满足设计需求。