查询词典 may modal

Subsequently, on the basis of simplifying the structure and boundary condition, the FEM models of the wheel's felloe rigidity computing, the wheel modal computing and the wheel bending analysis were built separately.

而后在对结构、边界条件简化的基础上，分别建立了车轮轮辋刚度计算、车轮模态计算和车轮弯曲分析有限元模型。

A new method of modal decomposition based on time-frequency filter is proposed in this paper.

应用非平稳信号的时频滤波进行多自由度时变线性系统的模态分解。

The finite element model of base plate is used in modal analysis and transient dynamic analysis by means of the elasticity finite element method.

同时运用弹性力学有限元法对座钣建立的有限元模型进行模态分析和瞬态动力学分析。

The reliability of the finite element model was validated base on the modal test.The results show that the stiffness of the body-in-white is great enough.

结果表明，该车白车身的刚度较大，为后续的优化设计提供了一定的空间。

At the same time,the finite element model of base plate is used in modal analysis and transient dynamic analysis by means of the elasticity finite element method.

为了优化发射器座钣的结构设计，采用有限单元法对某型号发射器座钣三维空间板壳结构进行了整体三维建模，同时运用弹性力学有限元法对座钣建立的有限元模型进行模态分析和瞬态动力学分析。

Program provides support for motion simulation and static and modal finite element analysis at both part and assembly level.

计划提供支持的运动仿真和静态和模态有限元分析的一部分，并在大会的水平。

The modal tests of PCB and PCB assembly (free boundary condition and fixed boundary condition) were carried out. The equivalent elastic modulus and damping parameters of PCB can be gained, and the fixed boundary condition of finite element model was also determined. These will help to the following work.Second, drop impact tests of three different heights were carried out. Strains and acceleration responses of PCB were measured. Failed BGA packages of different test conditions were dyeing, and cross section analysis of failed solder joints was conducted.

针对JEDEC标准试件的局限性，提出了设计便于统计学研究焊点可靠性的试验试件的构想，利用有限元模态分析方法确定并验证了用圆形PCB组件替代JEDEC标准试件的可行性；通过一系列模态试验和有限元模态分析，确定了圆形PCB组件的相关试验参数，这不仅为跌落碰撞下PCB组件有限元模拟确定了较为合理准确的有限元模型，而且为正确地评价跌落碰撞下PCB组件的可靠性问题奠定了基础。2。

The modal tests of PCB and PCB assembly (free boundary condition and fixed boundary condition) were carried out. The equivalent elastic modulus and damping parameters of PCB can be gained, and the fixed boundary condition of finite element model was also determined. These will help to the following work. Second, drop impact tests of three different heights were carried out. Strains and acceleration responses of PCB were measured. Failed BGA packages of different test conditions were dyeing, and cross section analysis of failed solder joints was conducted. It was found in our drop tests that the root cause of lead-free solder joints under drop impact was the combined effect of mechanical shock and PCB bending vibration.

针对JEDEC标准试件的局限性，提出了设计便于统计学研究焊点可靠性的试验试件的构想，利用有限元模态分析方法确定并验证了用圆形PCB组件替代JEDEC标准试件的可行性；通过一系列模态试验和有限元模态分析，确定了圆形PCB组件的相关试验参数，这不仅为跌落碰撞下PCB组件有限元模拟确定了较为合理准确的有限元模型，而且为正确地评价跌落碰撞下PCB组件的可靠性问题奠定了基础。

Firstly, dynamic equations?mathematics modal of a fighter and a bomber has been built and some solutions of the dynamic equations have been acquired in the paper. Secondly, a flight simulation vision system has been set up which can display flight status and flight parameters of the simulated airplane.

首先，本文建立某歼击机及某轰炸机的六自由度运动方程的数学模型，并做了一些求解运动方程方法的探讨，在完成运动方程求解的基础上创建模拟视景系统，用于显示飞机的即时位置及飞行姿态和各种飞行参数。

A system modal dialog box doesn't allow you to change input focus to any other window until you respond to it first.

一个系统模式的对话框不允许你切换输入焦点给任何其它窗口，直到你响应它为止。

Nowadays, most of research are to build a transmutative Petri Nets through adding controlling place sets, controlling arc sets and controlling policy to the basic Petri Nets, while the Controlled Petri Nets could be used to argue many controlling theory problems conveniently and to induce many logically and physically supervisory and solve the Event Feedback Controlling Problems and State Feedback Controlling Problem in DEDS supervisory theory.

目前大多数的研究表现为在变形后的受控Petri网基础上，利用各种方法求得各种逻辑型、结构型控制器，解决DEDS监控理论中的事件反馈控制问题与状态反馈控制问题。

On one hand, there are discussions with the works council and union about extension of short time working up to the end of September.

一方面，有讨论，工程理事会和联盟关于延长工作时间短至9月底。