English translation for "first natural frequency"

一阶自然频率

Example Sentences:

	1.	First natural frequency control and shape design of mast 桅杆首阶固有频率控制与构形设计
	2.	The first natural frequency calculated from these models coincides well with measured result 由修正模型计算得到的转子系统固有频率与实测的转子系统固有频率吻合良好。
	3.	Finally , the size of the crack is identified by using the identified crack location and the first natural frequency 最后，利用已识别的裂纹位置和第一阶固有频率定量地识别了裂纹尺寸。
	4.	The first natural frequency map in working space was drawn , which can be useful for selecting proper working position to avoid resonance or low - order harmonic oscillation 讨论了频率求解精度、收敛性与单元横向弹性位移型函数以及单元数量之间的关系。
	5.	It is shown that the effects of the stiffness and inertia of the piezoelectric element that lead to higher first natural frequency on the natural frequencies of the beam are significant , and that of the elastic modulus of the bonding layer is small 研究表明，压电元件的刚度和惯量对梁的频率影响很大，变截面智能压电梁的一阶固有频率总是高于等截面梁的固有频率。
	6.	In order to gain high reliability , when designing pcb these questions must be considered : whether the first natural frequency of pcb is large enough or not ? what are the dynamic characteristics of pcb and where are the weak points of pcb 因此,为了保证印制电路板的高可靠性,就必须在印制电路板的设计和振动分析过程中,考虑以下问题:印制电路板的固有频率是多少,使用中是否会发生共振破坏
	7.	Studies indicate that : ( 1 ) it is the approach of the first natural frequency of the handle ( 43 . 9hz ) and the working frequency under the rated rotate speed of the engine , due to the unreasonable mechanism design , that causes the serious vibration on the handle of the gn31 cultivator 研究表明： ( 1 ) gn31耕整机扶手架的振动量过大主要是由于扶手架的1阶固有频率( 43 . 9hz )和耕整机发动机的额定转速下的惯性力1阶频率( 43 . 3hz )接近，为扶手架结构设计不合理所致。
	8.	Then , we establish the finite element analysis models of the antenna in different structure layout , and obtain the corresponding frequencies and model shapes . finally , according to the importance of each object , we set up the model of multiple objects that aims to maximize the first natural frequency and minimize the mass . combining orthogonal experiment and variant weighting coefficient method , we formed an effective multiple objects optimized algorithm basing on the neural network and genetic algorithm 本文首先详细的叙述了天线结构的各组成单元，阐明了天线反射抛物面的形成原理；然后在ansys软件环境中建立了不同结构布局下天线的有限元分析模型，分析计算了各种情况下天线的的固有频率与振型；最后依据天线各指标的重要性，建立了以一阶固有频率最大、质量最小为目标的天线结构多目标优化设计模型，并基于神经网络和遗传算法，结合正交实验和变加权系数技术，形成了一种有效的多目标优化算法，在matlab平台下实现了天线的结构多目标优化设计计算程序，求得了天线的最佳结构参数。
	9.	Theoretical research on the type and mainframe tripled frequency converter : on the basis of building finite element models , dividing grid , application of load in the software of ansys , the dynamic and static performances are calculated , the value of the deformation , the first natural frequency and corresponding mode of the frequency converter are obtained , finally , the dynamic performances of the frequency converter are analyzed 对型三倍频组件和主机三倍频组件的理论研究:采用通用ansys软件对组件进行合理建模,划分网格,施加载荷,在此基础上对它们进行了静态分析和动态分析,得到最大变形量、低阶固有频率和相应的振型,并对组件的动态性能进行了分析。
	10.	Modal analysis , frequency response analysis , random vibration analysis and vibration fatigue analysis are carried out based on the modified finite element model . the first natural frequency of pcb is 57 hz , and the dynamic response in the first natural frequency is the largest . weak points are also found 为分析该印制电路板可靠性及设计缺陷,需对修改过的有限元模型进行模态分析、频率响应分析、随机振动分析及疲劳寿命分析,以全面了解该印制电路板的动态特性(包括:印制电路板的固有频率、随机振动响应情况) ,以及存在的薄弱环节。

Similar Words：

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