Some of the damage indices are insensitive to the structural damage when using dynamic parameters changing for damage diagnosis of truss structure 摘要利用结构动力参数的改变对空间钢网架进行损伤分析，其中许多指标对损伤并不敏感。
Although many countries have made their own design guideline of dynamic foundation , determining dynamic parameters still exists many problems 虽然世界上许多国家都制定了本国的动力机械基础设计规范，但动力参数的确定仍存在许多问题。
In the result with lateral jets , the structure of jets , the pressure of projectile surface and the aerodynamics characteristics are all in steady periodical fluctuation 弹丸侧喷流场干扰波系的空间结构、弹体表面压力和各种空气动力参数均表现为稳定的周期性波动。
The solid models of the components are built automatically by using their data sheets and related programs , and dynamic parameters are calculated or supplied from data bases 利用组件资料与相关程序计算其几何尺寸，自动创建组件三维模型，并以此模型或参数库资料计算系统动力参数。
The fourth , the models of the drivers are set up by electromotor drive and fluid drive theory , from which the programs are compiled for adams to call in as the input parameters 运用电机拖动、液压控制的一般理论建立了某炮供输弹系统驱动环节的数学模型并编制了相应计算程序，通过adams的数据接口调用这些程序以作为动力参数输入。
Field tests and laboratory tests are performed , and the difference of results is researched comparatively . cyclic simple shear test and dynamic triaxial test are performed too , and the difference between them is obtained 同时研究室内动三轴试验和循环单剪试验所确定的土动力参数,并比较了它们的差异,分析了试验结果差异的原因。
The advantages of the method offered are simplicity in derivation , clearness in analysis and convenience in reflecting the nonlinear influence of rotor connections upon the dynamic characteristics of the system 该方法的分析推导过程简捷、清晰，易于结合对弹性支承主要动力参数的测量准确反映转子之间复杂的联接方式对系统动力特性的明显的非线性影响。
Based on underwater vehicle ' s nonlinear differential equation and observation equations , swarm intelligence algorithm is used to identify ten hydrodynamic parameters from simulation observed data of the motions of underwater vehicle 摘要通过水下航行体的状态方程和试验观测方程，利用智能辨识技术对水下航行体的模拟运动数据进行了仿真辨识，求得了10个水动力参数。
It brings forward the methods for identification of the dynamical parameter of linear structure base on nn and analyses some calculating examples , too . finally , it concludes that it is feasible that nn is applied to the simulation of seismic resistant structure 对基于神经网络进行线性结构动力参数识别进行了一些初步的探索和研究，提出了基本的思路和方法，并进行了算例分析。
Of all the methods , the method on the base of frequency vibration is the pioneer vibration - based methods to detect structural damage , also emerge it test simple and accurate , applied convenience etc . advantage in continuous developments 在所有的动力损伤检测方法中,基于频率改变的方法属于发展最早的利用动力参数变化检测结构损伤的方法,也在不断的改进和发展中展现出其测试简便准确、应用方便等优点。
