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   unit-step 在 力学 分类中 的翻译结果: 查询用时:0.006秒
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unit-step
相关语句
  单位阶跃
    The Use of Unit-step Function in the Bend of Girders
    单位阶跃函数在梁的弯曲变形中的应用
短句来源
    The uses of the Unit-step function in material mechanics
    单位阶跃函数在材料力学中的应用
短句来源
    the Stieltjes convolution of the creep compliance and the relaxation modulus of the model can equal the unit-step function approximately and in considerable wide frequency range the model can fit the storage modulus and the dissipation modulus very well.
    并能做到松弛模量和蠕变柔量的Stieltjes卷积近似等于单位阶跃函数; 在很宽广的频率范围内能同时很好地模拟真实材料的存储模量和损耗模量。
短句来源
  “unit-step”译为未确定词的双语例句
    Dislocation distribution function of the edges of an axially symmetric crack subjected to unit-step loads
    轴对称裂纹表面受阶跃载荷的位错分布函数
短句来源
    The paper introduce the application of the method of Boundaty element in the problem of viscidity- plasticity. By the approximation of Perzyna to simulate the pure elastic resolution we can get the answer time - dependent with the simple eulor unit-step and discussing the criterion of the choice of time - step.
    本文介绍了边界单元法在粘塑性分析中的应用,采用Perzyna近似方法模拟纯弹性解,用简单的欧拉单位步长过程得到了与时间相关的解,并且讨论了选取时间步长的准则。
短句来源
    By the method of theory of complex functions,analytical solution to dislocation distribution function of the edges of an axially symmetric crack subjected to unit-step loads for transversely isotropic body were obtained.
    通过复变函数论的方法,得到了横观各向同性体的轴对称裂纹表面受阶跃载荷作用下的位错分布函数的解析解.
短句来源
    The problems researched can be facilely transformed into Riemann-Hilbert problems and analytical solutions to an asymmetrical propagation crack under the condition of point loads and unit-step loads,respectively,are acquired.
    应用该法可以迅速地将所论问题转化为Riemann-Hilbert问题,并求得了非对称扩展裂纹分别在集中载荷、阶跃载荷作用下的解析解.
短句来源
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  unit-step
It is well known that the relaxation modulus of a linear-isotropic-viscoelastic material under uniaxial load is the stress history of a unit-step strain history.
      
The response of a two-dimensional system of a certain class to an input of the unit-step type
      
An experimentally obtained transient response of the acoustic anemometer along with a theoretical expression of the response in an approximation of the unit-step function by an inertial unit are presented.
      
In such cases, an additional performance criterion, such as the integral of squared error of impulse response or unit-step response, has to be used to select a suitable Routh approximant.
      
The problems researched can be facilely transformed into Riemann-Hilbert problems and analytical solution to an asymmetrical propagation crack under the condition of point loads and unit-step loads, respectively, is acquired.
      


This paper applies the unit-step function to determining the beam deflection. and developingthe new initial parameter. obtaining the conventional equation of the beam deflection. this paper alsodiscusses the application of the new initial parameter method.

应用单位阶跃函数提出了求梁变形的一种新的初参数法,给出表示梁变形的通用方程,并对新的初参数法的应用进行了讨论。

When a girder becomes curved or deformed no matter whether we make a strength calculation or a rigidity calculation,the camber of a girder is always a very important measure.In the pactice of engineering,when a girder is acted on by a complicated load,the equation of camber (camber function ) is often a divided funtion,which is not only unfavorable to the practical calculation of engineering,but also to the theoretical research.The key point in solving the problem is the way to replace the camber function on...

When a girder becomes curved or deformed no matter whether we make a strength calculation or a rigidity calculation,the camber of a girder is always a very important measure.In the pactice of engineering,when a girder is acted on by a complicated load,the equation of camber (camber function ) is often a divided funtion,which is not only unfavorable to the practical calculation of engineering,but also to the theoretical research.The key point in solving the problem is the way to replace the camber function on condition, that a complicated load acts the girder on by one function.In this light this article discusses which girder is acted on by the different bind of loads and how to work out a general formula by the use of a unit step function.Finally,it also applies the further theoretical research with a simpler mathematical form.This approach simplifies the practical calculation of engineering to a great extent.

梁产生弯曲变形时 ,我们无论是进行强度计算还是刚度计算 ,梁的弯矩都是非常重要的一个量。在工程实际中 ,梁受复杂载荷作用时 ,其弯矩方程常常是一个分段函数 ,既不利于工程实际计算 ,也不利于理论研究。解决这个问题的关键就在于如何把梁在复杂载荷作用下的弯矩函数统一用一个函数来表达。因此 ,本文就是基于这个思想 ,对于受各种不同载荷作用的梁 ,讨论了如何通过单位阶跃函数写出梁的弯矩方程的统一表达式 ,为进一步的理论研究提供了较为简单的数学形式 ,同时还大大简化了工程实际计算。

In this paper, the equivalence of two classical viscoelastic models for solids is proved and the shortcomings of these models are pointed out. The restrictions of thermodynamics upon parameters of the fractional exponential model [1] are given. It is shown by the comparison of calculations and experiments that since the model contains proper parameters, the model can simultaneously fit the experimental data of the creep and the relaxation processes of the same material with high accuracy by using the same set...

In this paper, the equivalence of two classical viscoelastic models for solids is proved and the shortcomings of these models are pointed out. The restrictions of thermodynamics upon parameters of the fractional exponential model [1] are given. It is shown by the comparison of calculations and experiments that since the model contains proper parameters, the model can simultaneously fit the experimental data of the creep and the relaxation processes of the same material with high accuracy by using the same set of parameters; the Stieltjes convolution of the creep compliance and the relaxation modulus of the model can equal the unit-step function approximately and in considerable wide frequency range the model can fit the storage modulus and the dissipation modulus very well. Since it has the advantage of high calculating speed and it can fit the experimental results of most real materials, the model can be widely used in the analysis of static or dynamic viscoelastic problems in engineering.

本文论证了两种经典粘弹性固体模型的等价性并指出了其存在的问题。给出了热力学对分数指数模型 [1]参数的限制条件。计算与实验结果比较表明:因为该模型具有适当多的参数,采用同一组参数可以做到同时与同一材料的蠕变和松弛试验结果很好吻合;并能做到松弛模量和蠕变柔量的Stieltjes卷积近似等于单位阶跃函数;在很宽广的频率范围内能同时很好地模拟真实材料的存储模量和损耗模量。由于其计算速度快,能与大多数真实材料的性能实验结果相拟合,可以广泛应用于工程实际中的粘弹性静力和动力问题的计算。

 
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