查询词典 structural frame

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 dynamic characteristics of stochastic truss structures and stochastic frame structures are analyzed by using Random Factor Method. Then, from the expressions of structural random response of the frequency domain, the computational expressions of the mean value, variance and variation coefficient of the mean square value of the structural displacement and stress response under the stationary random excitation or non-stationary random excitation are developed by means of the random variable's functional moment method and the algebra synthesis method.

考虑压电智能桁架结构物理参数、几何参数、结构阻尼和外荷载、闭环系统控制电压分别或同时为随机变量，构建了结构在随机力作用下的动力响应分析模型，提出了求解方法，推导出结构动力响应随机变量的数字特征计算表达式，通过算例验证了所建模型和所提求解方法的正确性和有效性。

However, most of these investigations focused on the rotating beams or plates undergoing a prescribed large overall motion, where the effect of large overall motion of the reference frame on elastic deformation was considered but at the same time the beam's elastic deformation couldn't influence the large overall motion of the reference frame because the large overall motion is known a priori. In fact, this kind of problem on the dynamic stiffening is a structural dynamics problem in a non-inertial frame.

值得指出，上述这些研究工作都局限于大范围运动为已知情况下的非惯性系下柔性体的动力学性质，实质上是一个非惯性系下的结构动力学问题，只考虑了大范围运动对变形运动的影响，而没有充分考虑到大范围运动和变形运动之间的相互耦合作用，这种耦合作用是单向的。

The structural analysis of steel frame is a fundamental problem in the design of steel structural which should take the second order effects into account.

钢框架的结构分析是钢结构设计中的基本问题，对于该类结构的分析应该考虑二阶效应的影响。

This paper discusses the characteristics of the portal frame building constructer and studies optimization method to design them.The systematic analysis of the portal frames steel structural characteristics is done in section 2. And in section 3 and section 4, the structural optimization design is introduced based on the principles of finite element analysis and the technology of Object Oriented Programming in the software ANSYS.

本文系统地分析研究了门式刚架钢结构的特点，在此阶段，以有限元为基础，借助大型有限元ANSYS面向对象程序设计技术进行优化设计，研究基于功能强大的ANSYS作结构优化设计的问题：提出有效的设计变量、优化目标函数(以降低结构重量、充分发挥材料性能为目标)，编写APDL优化程序控制文件，在ANSYS程序上实现门式刚架结构优化设计。

Consider that processes the factor such as being convenient, the whole frame adopts the stencil plate to press the shaping craft, so as to ensure the whole intensity of the frame; The main body of the frame has continued to use the traditional ladder-shaped structure, of simple structure, stability is good; Assign the scheme wholly according to the electric automobile, has confirmed the physical dimension of the frame; Combine the scheme of decorating of the main spare part of electric automobile, has confirmed the frame is released, the crossbeam one decorates a form and connects the method, install the needing of main spare parts such as the gear box,etc. in because some crossbeams, has taken the structural form of the ingot roof beam.

考虑到加工方便等因素，整个车架采用钢板冲压成型工艺，以保证车架的整体强度；车架主体沿用了传统的梯形结构，结构简单，稳定性好；根据电动汽车整体布置方案，确定了车架的结构尺寸；结合电动汽车主要零部件的布置方案，确定了车架纵、横梁的布置形式及连接方法，部分横梁因为安装变速器等主要零部件的需要，采取了元宝梁的结构形式。

According to the calculation analysis of one multi storied house project,it compares the key technical parameter and qualification of the concrete structure,rolled H profiled bar frame structure,welding H profiled bar frame structure design result,which shows steel frame structure applied in multi storied house is a structural system to be worth generalization.

通过对一多层住宅建筑工程设计方案的计算分析，比较了混凝土结构、轧制H型钢框架结构、焊接H形钢框架结构设计结果的主要技术参数及指标，表明钢框架结构应用于多层住宅是一种值得推广的结构体系。

After general introduction in chapter 1, chapter 2 discusses the optimal stiffness of shear wall of frame-shear wall tall buildings in seismical region with known constructional material and structural type, by the method of structural optimization.

本文致力于高层建筑结构力学分析与计算的研究。

Design on the principle that security , economy are rational , esthetic , fix up the selection of structure and structural level of every floor, assign , turn into with PK software AutoCAD revise the part behind the structural level well; Adopt stair and floor calculating and designing a teacher to appoint by hand, and calculate the appointed floor with PKPM software, compare with the floor that calculates by hand, fetch the drawing construction drawing of the head of the two; Calculate by hand the frame which the teacher appoints loads, set up good PKPM and calculate the procedur

设计以安全、经济合理、美观为原则，进行结构选型和各楼层结构平面布置，用PK软件布置好结构平面后再转到AutoCAD上进行局部修改；采用手工计算设计老师指定的楼梯和楼板，并用PKPM软件计算指定楼板，与手工计算的楼板进行比较，取二者之长绘制成施工图；手工计算老师指定的框架荷载，建立好PKPM计算框架程序模型，用PKPM计算框架内力并输出文件结果，把PKPM计算得到结构配筋图转到AutoCAD进行局部处理；从PKPM得出的框架构件内力组合，选择三组最不利的组合作为基础设计资料，进行手工设计基础，并用AutoCAD绘制得出基础详图及配筋。

Design on the principle that security , economy are rational , esthetic , fix up the selection of structure and structural level of every floor, assign , turn into with PK software AutoCAD revise the part behind the structural level well; Adopt stair and floor calculating and designing a teacher to appoint by hand, and calculate the appointed floor with PKPM software, compare with the floor that calculates by hand, fetch the drawing construction drawing of the head of the two; Calculate by hand the frame which the teacher appoints loads, set up good PKPM and calculate the procedure model of the frame , calculate frame internal force and output file result with PKPM , calculate , get PKPM structure mix muscle picture turn into AutoCAD carry on part punish; Build up pieces of internal force association from frame that PKPM obtain , choose three group unfavorable association design the materials as the foundation most, carry on the design basis of the craft, and draw and obtain the basic detail drawing and match the muscle with AutoCAD.

设计以安全、经济合理、美观为原则，进行结构选型和各楼层结构平面布置，用PK软件布置好结构平面后再转到AutoCAD上进行局部修改；采用手工计算设计老师指定的楼梯和楼板，并用PKPM软件计算指定楼板，与手工计算的楼板进行比较，取二者之长绘制成施工图；手工计算老师指定的框架荷载，建立好PKPM计算框架程序模型，用PKPM计算框架内力并输出文件结果，把PKPM计算得到结构配筋图转到AutoCAD进行局部处理；从PKPM得出的框架构件内力组合，选择三组最不利的组合作为基础设计资料，进行手工设计基础，并用AutoCAD绘制得出基础详图及配筋。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。