分析动力学

In addition, reaction kinetics of thermal decomposition of precursor was determined by thermogravimetry analysis.

研究了包覆过程和焙烧过程的最佳工艺参数，以及通过热重分析研究了前驱体热分解过程的反应动力学，提出了反应动力学模型

Regarding the open chain plane multibar performing mechanism as the object, this paper analyzes its establishing problem of dynamics equation from new degree, and this paper gives the new general formula to the similar velocity, similar angular velocity, inertial coefficient by turns.

文章以开式链平面连杆机构为对象，从新的角度探索分析其动力学方程的建立问题，文中依次对类速度、类角速度、惯性系数、广义力给出新的求解通式。最后用拉格朗日方程建立相应的动力学方程

It provided a basis for building more accurate dynamical model. 4. Based on AD250 articulated dump truck multi-rigid body dynamics model, flexiblemulti-body models of suspension components for which the deformations are relatively important were built using finite element method. Modified Craig–Bampton modal synthesis and flexible multi-body methods were applied to build rigid-flexible coupling multi-body model of the truck. Dynamic simulations with different road profiles were performed.

基于AD250铰接式自卸车多刚体动力学模型，应用修正的Craig–Bampton模态综合法，对车辆行驶过程中相对变形较大的悬架杆件进行模态分析，把生成的模态中性文件引入到多刚体模型中取代相应的刚体，建立了相对多刚体模型更符合工程实际的整车刚柔耦合多体动力学模型。

The main contents include ? the foundation of MD simulation cell in Grand Canonical Ensemble;? the establishment of elastic collision mechanism between hydrogen molecules and carbon nanotube walls and arithmetic design;? molecular dynamics simulation details of hydrogen physisorption in single walled carbon nanotube arrays and program design;? the acquirement and analysis of computer simulation results, where the influences of tube diameter, distance between tubes, temperature and pressure on hydrogen physisorption in SWCNTA are investigated in detail.

主要内容为：①巨正则系综分子动力学模拟元胞的创建；②氢分子与碳纳米管壁弹性碰撞机制的建立及算法设计；③碳纳米管阵列物理吸附储氢的分子动力学模拟细节及程序设计；④计算机模拟研究结果的获取与分析，重点研究了管径、管间距、温度和压强对单壁碳纳米管阵列物理吸附储氢的影响。

Firstly, this paper investigated roundly the basic theory of the ambient vibration method, analyzed systematically the main methods of ambient vibration identification, and discussed their advantages and disadvantages. Then we established the finite element model of structural dynamics and test model and analyzed their mutual relation, improved MUSIC method and correlation function method in the harmonic identification, and gave the subspace method and correlation function method based on continuous model, which is multi-harmonic retrieve technique. And then, this paper also puts forward least-squares method to estimate directly structural physical and modal parameters; this approach replaced the derivative operator in the continuous time model with an equivalent approximation, and estimated the physical parameters of structures by the least-squares method. And then, we discussed the approximation methods of derivative and their convergence. Finally, this paper researched the modal parameters of a frame structure by the simulation and test. The results demonstrated that subspace method, correlation function method and the least-squares method are effective and stable respectively.

全面地研究环境振动识别方法的基本理论，系统地分析环境振动识别方法的主要方法，讨论它们的优点和不足；建立结(来源：6666AB44C论文网www.abclunwen.com)构动力学的有限元模型和试验模型，分析有限元模型与试验模型之间的相互关系；改进谐波识别中的MUSIC识别方法和相关函数识别方法，给出大型结构模态识别的连续型的子空间分解识别方法和相关函数识别方法，这个方法是多元谐波识别方法；提出直接识别结构的物理参数和模态参数的最小二乘方法，这个方法利用导数的近似值代替导数值，并运用最小二乘方法识别结构的物理参数，讨论导数近似值的选择方法，分析算法的收敛性；通过仿真计算和模型实验，研究高层框架结构的模态参数识别，验证子空间分解识别方法、相关函数识别方法和最小二乘识别方法的有效性，算法的稳定性；从理论和试验两个方面分析和研究噪声对识别精度的影响，影响识别精度的因素，以及部分模态成分的模态参数不能够被识别的原因。

The crystallization kinetics of cordierite glass-ceramics and the effect of nucleation agent on the crystallization kinetics parameters were studied by TG-DTA.

采用TG-DTA分析，研究了堇青石微晶玻璃的析晶动力学参数以及对玻璃析晶动力学参数的影响。

Based on the foundation of the virtual prototype model of the medium-speed maglev train, using the mechanical dynamics and kinematics analysis software ADAMS, this paper expatiates on the following things. Firstly, it analyses the decouple of single magnetic bogie by the simulation and experimentation; secondly, adds the magnetic levitation control system to the single magnetic bogie model and simulates; thirdly, by simulating the motion of the train running on the different type of guideway, analyses the state of the train on the ramp and crankle;in the end ,this paper does a further research on how the magnetic levitation control system and guideway parameters affect the suspending gap when the train runs on the ramp and crankle .

论文在建立了中低速磁浮列车虚拟样机模型的基础上，借助于机械系统运动学及动力学分析软件ADAMS，首先从单转向架出发，仿真分析了磁浮列车单转向架的解耦能力；接着对单转向架样机模型进行了控制系统的仿真；然后对一辆整车在竖曲线和平曲线的运行在ADAMS中进行了仿真，分析了列车在坡道和弯道上的运行状态；最后对磁浮列车在坡道和弯道上运行时的系统性能进行仿真分析，进一步研究了控制系统和线路参数对磁浮列车悬浮性能的影响。

The paper commencing with analyses of the basic property of the hydrate, structure and sort, analyzes micro kinetics, formation condition, gas hydrate formation mechanism and influencing factor in high sulfur; also proceed analysis in depth for existent hydrate prediction model; according to gas dissolving, hydrate lattice deformation, synergistic action of inhibitor, carry out analytical study for existent error between normal forecast model and physical condition; introduce key parameter theory to establish and modify prediction model of hydrate formation condition to suit for high sulfur gas reservoir and inhibitor system, analyses different kinds of prevention and cure measures to influence of hydrate; finally, through field application in high sulfur gas reservoir hydrate.

本文从分析水合物的基本性质、结构与分类出发，分析了水合物生成过程中的微观动力学、生成条件、高含硫天然气水合物生成机理以及影响因素；并对现行的水合物预测模型进行了深入剖析，根据气体溶解、水合物晶格变形、抑制剂协同作用等因素对常规预测模型与实际条件之间存在的误差进行了分析研究；通过引入关键参数理论，建立并改进了适合高含硫气藏水合物生成条件预测模型及抑制剂体系的高含硫水合物生成条件预测模型，分析了各种防治措施对水合物的影响；最后通过高含硫气藏水合物实例计算，分析了含硫化氢、二氧化碳组分的天然气与常规气体对水合物生成条件的影响，并对各种水合物防治措施进行了实例计算。

The committee had under it six failure analysis groups for rocket debris analysis, fairing analysis, dynamics coupling analysis, video-tape analysis and telemetry date analysis.

该委员会下设火箭残骸分析、整流罩分析、动力学耦合分析、录像分析、遥测数据分析等六个调查小组。

In the research, the study of car impact test and numerical simulation method are both used. Based on works that have done, an impact model containing car model, dummy and restriction system model was built. According to national regulation, different types of impacts were simulated. The fuel cell auto's impact safety was analyzed, and the injury criterion for occupant can be read out directly by simulation data. The main research content of this project is to set up the fuel cell auto's frontal impact model, side-impact model, rear-impact model and the whole frontal impact model, which contains car model, dummy, restriction system model and so on, and calculating these models.

在本课题的研究过程中，博采众长，坚持创新，在综合分析总结前人研究经验的基础上，将实车碰撞试验研究与仿真计算分析方法结合起来，统一车身耐撞性有限元计算分析与乘员在约束系统作用下的运动响应的多体动力学分析，采用整车虚拟碰撞试验法进行燃料电池轿车的碰撞安全性研究，即建立一个集车辆、人体模型及乘员约束系统三者于一体的完整的车辆模型，以国家安全法规为依据，进行各种碰撞型式的整车虚拟碰撞试验，利用仿真计算结果进行燃料电池轿车的碰撞安全性分析，直接预测乘员的伤情指标。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失