弹性动力学

By running the program based on vehicle-rail coupling dynamics, compute the dynamic response of elastic sleeper ballasted rail and common sleeper ballasted rail under same working condition.

利用车辆-轨道耦合动力学理论所编制的程序，计算弹性轨枕有碴轨道与普通轨枕有碴轨道在相同工况下的动力响应。

In this thesis, a detailed dynamics model of various kinds of tracks laid on the bridge such as ballast track, REHDA track, slab track, elasticity supported block track and all kinds of roadbed-bridge transition structure of the high-speed railway is established for the

本文在国内首次针对高速铁路桥上有碴轨道、长枕埋入式无碴轨道、板式轨道、弹性支承块式轨道结构以及各种轨道的路桥过渡段建立了系统全面的动力学模型。

In order to study the primary resonance and primary parametric resonance of a rectangular deck plate subject to harmonic disturbances in temperature field, by applying elastic theory, a nonlinear dynamical equation in partial differential form for the plate is established first. Then the nonlinear vibration equation in ordinary differential form is obtained based on Galerkin's method.

为了研究温度场中桥面矩形薄板受简谐激励的主共振－主参数共振问题，应用弹性力学理论建立其动力学方程，应用Galerkin方法将其转化为非线性振动方程。

In this thesis, the effect of vacancy concentration on elastic properties of aluminum under high pressures (from–15 GPa to 20 GPa) is studied by means of MD simulation. The embedded-atom model is employed to describe inter-atomic interaction in face-centered cubic aluminum.

本论文运用分子动力学方法，采用嵌入原子模型描述原子之间的相互作用势，在0-15GPa压强范围，对面心立方结构金属铝中空位密度对其弹性性质的影响进行了计算模拟。

An articulated rotor with a blade hinge offset and with an elastic restraint about the flap hinge is used as the rotary wing dynamic model.

旋翼动力学模型采用水平铰外伸量和桨叶根部有弹性约束的结构模型。

The force is dominated by entropy force when the chain isdeformed less than 0.9 of the full-extended chain, while by enthalpy force. Theenthalpy force is contributed by the intro-molecular interaction. Bond stretchcontributes to the force more than bond angle bend. Torsion and VDW contributelittle to the force.3. The internal energy contribution to the elastic force It is in dispute that whether 〓 is dependent on the strain, and it is hard toresolve the problem using present elastic theories because they are athermal.

我们模拟了聚乙烯模型聚合物的SMFS，研究了链长、势能有效距离和温度对力谱的影响，探讨了力谱的本质问题，得到以下结果：改进的分子动力学方法可以很好的模拟聚合物的SMFS；SMFS是链段的性质而不是整个高分子链的性质，对于聚乙烯，该链段碳原子数目大于40；SMFS的本质是熵弹性，形变小于全伸直链的0.9时，力为熵弹力；形变超过全伸直链的0.9时，能弹力占主导地位，这种能弹力完全是分子内相互作用引起的，是由键伸缩和键角弯曲贡献的。3。

And objective parameters (texturized degree, color, hardness, springiness, chewing, water absorption, yield, etc.) were investigated in the high moisture soy protein extrusion process, and the statistical models of system and objective parameters were built, using the step-by-step regression analysis; A comprehensive evaluation of the products, and the process optimization of high moisture extrusion were obtained,using factor analysis; Secondly, residence time distribution and soy isoflavones losses kinetics were studied in the high moisture extrusion; Finally, chemical bonding process, the micro-structure and protein secondary structure changes were investigated in the texturization of soy protein, then the mechanism assumptions of texturization soy protein by moisture extrusion were proposed.

本文对大豆蛋白高水分挤压组织化技术和机理进行了研究，研究内容包括：首先采用系统分析法，研究了大豆蛋白高水分挤压过程中，挤压机操作参数(螺杆转速、物料水分、喂料速度和机筒温度)对系统参数(系统压力、扭矩、单位机械能等)、目标参数(组织化度、色泽、硬度、弹性、咀嚼性、吸水率、产量等)的影响规律，建立了各因变参数的统计模型；采用因子分析法对产品进行了综合评价，并对高水分挤压组织化工艺进行了优化；其次，研究了大豆蛋白高水分挤压中的停留时间分布以及大豆异黄酮的损失动力学；最后，研究了大豆蛋白组织化过程中化学键、微观结构和蛋白质二级结构的变化规律，提出了大豆蛋白高水分挤压组织化的机理假设。

The nonlinear dynamic model of a thermo-mechanical coupling viscoelastic rectangular plate with temperature field and subjected to both actions of an alternating periodic transverse external excitation and in-plane uniform distributed force is established.

建立了横向周期荷载、面内均布荷载和温度场作用下，考虑热传导效应的粘弹性矩形板的热机耦合非线性动力学模型。

Aimed at a changing power mechanism,a ratchet mechanism with double electric pawls,we introduce the operating principle,establish its model and optimize the important geometry parameters in its structure design in this paper.

针对一种动力转换机构———弹性双棘爪棘轮机构，介绍了它的工作原理，对其结构设计中的重要几何参数建立了模型，进行了优化，为下一步的动力学优化设计打下了基础。

Aimed at a changing power mechanism, a ratchet mechanism with double electric pawls, we introduce the operating principle, establish its model and optimize the important geometry parameters in its structure design in this paper. This founds a basis of next step for optimum design of its structural dynamics.

针对一种动力转换机构－弹性双棘爪棘轮机构，介绍了它的工作原理，对其结构设计中的重要几何参数建立了模型，进行了优化，为下一步的动力学优化设计打下了基础。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。