查询词典 nonlinearity

In addition, the effects of geometric nonlinearity and the aerostatic load nonlinearity of long-span bridges under strong wind load shouldnt be neglected.

另外，在强静风荷载作用下，大跨径桥梁的几何非线性、静风荷载非线性的影响均不容忽视。

This paper is also concerned with the nonlinearity measure of the PKM, which depend upon differential geometry curvature. The nonlinearity can be reflected by the curving of the solution loci and the equal interval input of joints mapping into inequable interval output of the end-effector.

从而解决了PKM设计中根据进给能力需求优化结构参数、确定关节伺服轴极限转速，以及在数控编程中由机床结构参数、关节伺服轴极限转速和加速度评价刀具进给能力的软极限的两类互逆问题。

However, many reallife problems always possess nonlinearity, moreover, in the process of transformation of fuzzy optimization problems to the equivalent crisp optimization problems, there always emerged nonlinearity, noncontinuous and some characteristics which are hardly dealt with by many traditional crisp optimization methods.

由于复杂的工业系统中存在各种类型的随机性和模糊性，同时很多的生产计划问题常常表现为非线性，因而很难用传统的生产计划与调度模型来描述，也难以用基于精确的数学方法来求解。

The FEA model of tire structure was established based on geometric nonlinearity of tire deformation, the nonlinear contacts between tire and ground and between tire and rim under deformation, ununiformity of tire material, incompressibility and physical nonlinearity of rubber material, and the anisotropy of rubber based composites.

哈尔滨工业大学复合材料研究所，黑龙江哈尔滨150001）摘要：基于轮胎变形的几何非线性、轮胎与地面和轮胎与轮辋的大变形非线性接触、轮胎材料的非均匀性、橡胶材料的不可压缩性和物理非线性及橡胶基复合材料的各向异性，建立轮胎结构有限元静态分析模型。

After comparing nonlinear simulation with linear, the results indicate that: Weak nonlinearity has definite and apparent influence on the distribution of acoustic fields and focused gain of array, which cause the distribution of waveform is closer to the array and the focused gain deteriorate ; the strong nonlinearity have a strong waveform aberration, because the other waves of non-fundamental frequency appear . No evident distinction is found in the effects between the oblique propagation and the vertical propagation, though less focused gain and influence caused by strong nonlinear produced by the acoustic diffraction which results in more attenuation in terms of oblique propagation.

将线性条件下的模拟结果与非线性条件下的模拟结果进行比较发现：弱非线性会对声场的分布和阵列聚焦增益产生一定的影响，使得声场分布波形比线性条件下的更加靠近阵列，聚焦效果变差；强非线性会使波形发生更严重畸变，这是由于产生了基频以外的其他频率声波引起的；非线性对斜向传播时声场分布的影响与垂直传播时的影响效果基本相同，但由于斜向辐射时的声波衍射造成的衰减要大于垂直辐射时的，因此聚焦增益和强非线性的影响都将小于垂直辐射时的情况。

By analyzing surrounding rock instability caused by tunnel excavation, surrounding rock instability of deep-buried tunnels is considered as a sudden failure phenomenon, which possesses nonlinearity and discontinuity obviously and shows the uncertainty of mechanical deformation property, nonlinearity of constitutive relationship and catastrophe of failure process.

在分析隧道开挖引起围岩失稳基础上，认为深埋隧道围岩的失稳是一种突发破坏现象，具有明显的非线性和不连续性质，主要表现在力学变形性质的不确定性、本构关系的非线性和破坏过程中的突变性。

Based on the experience of compiling the program, the paper discussed some topics which should been taken note of while compiling a plane member structure FEM program that took the geometric nonlinearity into account as well as the material nonlinearity. With this program, the paper analyzed the effect of the factors on the anti-bending capability of externally prestressed concrete beams and come into some useful conclusions. The factors included: the rate of ordinary steel bars, the initial prestress of the external tendons, the shape of the external tendons, the position and number of deviators and the number of segments.

结合编程实践，本文讨论了编写考虑几何非线性和材料非线性的平面杆系有限元程序应该注意的一些问题，并应用所编的程序，对体外预应力混凝土梁的抗弯性能进行了普通钢筋配筋率、体外索的初始张拉力、体外索的配筋形式、转向块的布置和节段的数目等五个影响因素的分析，得出了一些有益的结论。

In this dissertation, the nonlinearity of the MOS varactors caused by the large output signal of the DCO, as well as its influence on the performance of the DCO, is analyzed. A back-to-back in series digitally controlled MOS varactor is presented to avoid the nonlinearity of the varactors of the DCO.

对DCO大信号工作时所引起的数控MOS变容管的非线性以及这种非线性对DCO性能的影响进行了分析，提出了改善这种非线性的背靠背串联数控MOS变容管的新结构，可以使DCO的相位噪声最多降低8.1dB。

In this paper, based on the finite element method, a three-dimensional finite element model was selected to simulate performance of the self-tapping screw connections and the failure modes of the panel, considering material nonlinearity and changing-status nonlinearity.

本文运用有限单元法，建立三维实体有限元模型，考虑了材料非线性与接触非线性，对钢板－自攻螺钉连接的受力情况和破坏模式进行了细致研究。

First of all, this paper analyzes the distributing situation of sectional temperature of two steel frame models within an hour utilizing the transient thermal analyse module of ANSYS;Secondly, carries on the failure analysis to two steel frame models at high temperature and obtains the fire-resistant limit and critical temperature of steel frame, utilizing the static nonlinear analyse module of ANSYS and considering the influence of geometry nonlinearity and material nonlinearity; Finally, according to the fire-protection designing requirement of structure, deduce a method to computer the thickness of fireprotection layer for steel structure and ask out the thickness of fireprotection layer of two steel frame models according to this method .

首先，利用ANSYS瞬态热分析模块，分析出两个钢框架模型在一小时内钢框架的截面温度场分布情况；其次，利用ANSYS静力非线性分析模块，综合考虑几何非线性及材料非线性影响，对钢框架模型在高温下进行失效分析，分析出两个钢框架的耐火极限及临界温度；最后，根据结构防火设计要求，推导出一种钢结构防火层保护厚度的计算方法，并据此方法求出两个钢框架模型的防火层厚度。

Objective:To explore the feasibility of laparoscopy in diagnosing and treating of abdominal diseases.

目的：探讨腹腔镜用以诊断腹部外科疾病及选择治疗方案的可行性。

The lifetime of nylon 1010 and nylon 1010/POSS composites decreased with increasing temperature.

热重-红外联用分析表明尼龙1010在氮气气氛下的降解产物主要为小分子的低聚物，POSS并不改变尼龙1010降解产物的组成。