查询词典 boundary condition

General clue of this paper is simulating wood stress field change in initial cutting stage and working out weighted boundary condition of cutting tools first,and then based on which, finding out shear stress and maximal effective stress when wood cut-ted.Meanwhile,finite element comparative analysis is proceeded on distortion and stress field by changing tool orthogonal rake.

本课题的总体思路是通过大型有限元软件ANSYS来模拟切削初始阶段中木材的应力场变化，进而得出刀具受力的边界条件，依此为基础求出木材受切时的剪应力及最大等效应力，同时通过变化刀具前角分别对受切工件的变形及应力场进行有限元比较分析，从而确定刀具的优化前角；优化前角确定后，再通过对刀具进行强度校核确定后角优化值。

Because of complex tectonic boundary condition and high stress environment in deep rock mass,surrounding rock has intrinsic characteristics,which will damage caused by stress redistribution in excavation of deep-buried tunnel .

随着细观损伤岩体力学的发展，采用损伤观点解决深埋隧道围岩破坏问题逐渐显示出其优越性，但目前仅在均质性假设的基础上对应力状态和破坏判据进行研究，缺乏对其破坏全过程的相关研究。

Below the water table depth, which is the lower boundary condition for ...

程时下边界条件规定的水层深度以下。

With the designed apparatus,the boundary condition of temperature,in the forging die is studied by means of experiment.

以锻模为例，采用自行设计的装置对温度边值问题进行了实验研究。

Using simple boundary condition, the temperature gradient along the z direction is a constant while the generative internal heat is not considered.

仅从顶表面耗散热量的情况下，不考虑对辐射的吸收，晶体中轴向温度梯度为恒值。

Using simple boundary condition, the temperature gradient along the z direction is a constant while the generative internal heat is not considered.

用导热微分方程描述晶体中温度场时，把吸收的辐射热当做晶体产生的内热，方程从Laplace形式变为Posson形式。

Half penalty method and optimism design of ten connecting bar mechanism of plunger slide in double action drawing press;2. The essential boundary condition is imposed by employing a penalty method .

将选择施加在&虚结构&控制点上的虚载荷作为形状优化的设计变量，并将它与无网格Galerkin法相结合来开展结构形状优化研究，采用罚函数法来施加边界条件，通过直接微分法建立了结构形状优化的离散型灵敏度分析算法，利用无网格法研究了节点坐标关于设计变量导数的计算。

The whole-space response characteristics for three dimensional conductive body located in the floor of the mine drift either in homogeneous medium or in layered medium was simulated, with using Mur absorbing boundary condition and taking a electrical dipole source in homogeneous whole space as a initial source; the diffused regularity of the transient field in homogeneous medium at 1.9 μs and 27.6 μs,and in layered medium at 1.2 μs and 0.023 ms was discussed.

利用Mur吸收边界条件，选用均匀全空间电偶极源作为初始激发源，模拟了均匀介质中巷道底板岩层内部和层状介质中三维低阻异常体的全空间响应特性，分析了瞬变电磁场在均匀介质中1.9 μs和27.6 μs两时刻的传播规律及在层状介质中1.2 μs和0.023 ms两时刻的传播规律。

It is significant to analyze the temperature boundary condition of aqueducts accurately.

渡槽长期暴露在空气中，外界温度变化对结构内力影响巨大，甚至引起建筑物的破坏，因此准确分析渡槽的温度边界条件具有重大的意义。

The method is as follows that the two ends of a nanometer are fixed on two pivots and an axial micro-pulling force T is applied on the nanometer; an electrode is arranged on the middle part of the side of the nanometer and an alternate voltage is applied on the electrode to motivate the nanometer to generate resonance, and therefore, the natural frequency f of the nanometer is measured and acquired; according to the material characteristics and the geometry characteristics of the nanometer as well as the boundary condition of the nanometer material, the relation between the natural frequency and the axial pulling force of the nanometer, namely the f-t curves of the nanometer, can be calculated by a vibration equation; according to the measured natural frequency f, the size of the micro-pulling force T can be acquired.

该方法将一根纳米材料的两端固定在两个支点上，给纳米材料施加一个轴向的微小拉力T；在纳米材料的侧面，位于该纳米材料的中部放置一个电极，在电极上施加一个交变的电压激励纳米材料使其发生共振，测得纳米材料的固有频率f；根据纳米材料的材料特性和几何特征以及纳米材料的边界条件，由振动方程计算出该纳米材料的固有频率与所受的轴向拉力的关系，即纳米材料的f-T曲线；根据上述测得的固有频率f，得到微小拉力T的大小。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。