After calculated the wind response of high - rise building with suspension structural system , damping ratio and vibration patterns are changed and different results will be obtained . combing the vibration characteristic of structure , the reason that outcome is different is interpreted 具体计算高层悬挂结构频域内的风振响应,改变结构阻尼比及参加计算的振型,得到各种不同情况下的风振响应,结合结构的自振特性,分析各种响应的特点及各自的产生原因,得出有用结论。
The piezoelectric laminated shell is a kind of adaptive structures , and integrated with composite base structure , piezoelectric sensor / actuator and controller units , which can observe the external disturbances by sensor , then change the structural state to adapt for the environment ' s change by the actuator , through regulation of controller units 压电层合壳是一种由复合材料基体、压电作动传感元件和控制单元所组成的自适应结构。它利用传感元件感受外界环境作用下的响应信息，在控制单元单元的调节下，通过驱动作动元件去改变结构状态，以适应环境条件的变化。
Under the horizontal earthquake action and wind force , aim at " the pure frame structure with rectangle columns " , " the pure frame structure with special - shaped columns " , " the frame - truss structure with special - shaped columns " and " frame - shear wall structure with special - shaped columns " , earthquake action analysis was done by the spacial finite element method through the changes structural parameter . analyzing systematically " structure vibration mode " , " vibration period " , " structure lateral rigidity " , " seismic action force " , " seismic response force " , " floor seismic shear force " , " lateral horizontal displacement of structure " and " members internal force " . results indicate : ( 1 ) based on equal area , the special - shaped columns replaced the rectangle columns , the structural lateral rigidity enlarges , the lateral displacement minishes obviously , the earthquake response increase slightly , the biggest increasing amount of frame columns axis - compress ratio is smaller than 0 . 08 . the whole aseismic performance of structure has improved ; ( 2 ) when the section ' s length and section ' s thickness ratio of special - shaped columns is smaller than 3 . 6 , the structure benefits to resist seismic action ; ( 3 ) the angle of horizontal seismic action with the whole coordinate is 0 degree , structure earthquake response is bigger , belonging to a control factor of structure aseismic design ; ( 4 ) the frame - truss structure with special - shaped columns and the " a " - brace has the biggest lateral rigidity ; ( 5 ) the frame - shear wall structure with special - shaped columns have bigger lateral rigidity and smaller displacement , members internal force enlarged just rightly , have much superiority of resisting seismic action ; ( 6 ) in the higher seismic fortification criterion region ( 8 degree of seismic fortification intensity ) , aseismic disadvantageous building site ( iii type site ) , adopting special - shaped columns structure system , should reduce possibly the building ' s self - weight in order to reduce the earthquake response ; ( 7 ) the response spectrum method of computing seismic response and the time - history analysis method have similar analysis result 西安理工大学硕士学位论文在水平地震作用下，并考虑风荷载组合，分别对“矩形柱纯框架结构” 、 “异型柱纯框架结构” 、 “异型柱框一析架结构”及“异型柱框-剪结构”等四种结构体系，通过改变结构参数，运用空间有限元方法，进行地震作用计算。系统地分析研究“结构振型” 、 “振动周期” 、 “结构侧向刚度” 、 “结构地震反应力” 、 “楼层地震剪力” 、 “结构侧向位移” 、 “层间位移角” ，以及“构件内力” 。结果表明:在等面积原则下，异型柱代换矩形柱后，结构刚度增大，侧向位移明显减小，地震反应力略有增加，框架柱轴压比最大增幅小于8 % ，结构整体抗震性能有所提高;当异型柱肢长肢厚比小于等于3 . 6时，结构有利于抗震;水平地震作用力与整体坐标夹角为0度时，结构地震作用效应较大，属结构设计的控制因素之一;异型柱框一析架结构采用“人”字斜撑，侧向刚度大于“八”字斜撑和“人一八”字混合斜撑;异型柱框一剪结构侧向刚度大、位移小，构件内力增大适中，是一种抗震性能优越的结构体系:在抗震设防烈度较高地区( 8度)和抗震不利的建筑场地( m类场地) ，采用异型柱结构体系时，应尽可能减轻结构自重，降低地震作用力;分别采用“振型分解反应谱”法和“时程分析”法进行地震作用计算，两种方法所得结果基本一致。
We notice that changes of structural parameter due to damage must change dynamic characteristic of structure . it may be possible to detect and identify structural damage by detecting the change of dynamic characteristic and detect structural damage on the whole even damage in area beyond of reach 我们注意到，损伤引起的结构参数的变化必然会改变结构的动力特性，自然可以用监测动力特性的改变来检测与识别结构的损伤，而且可以从整体意义上检测结构的损伤，包括处于无法到达位置的损伤。
The numerical results show that the nature frequencies of the structure are affected by the temperature effect , boundary conditions and the number or orientations of layers ; the proper orientations can change the nature frequencies ; the effect degree on the nature frequencies of cross - ply laminated cylindrical shell is different from that of the antisymmetric one 结果表明，温度效应、边界约束、铺层层数显著影响结构的固有频率，适当的铺层角度会改变结构的固有频率，不同的铺层方式对结构固有频率影响程度不同。
The solution existence for dynamic topology optimization of truss is explored from the engineering point of views : when the design variables ( section areas ) are continuous and their bound are not imposed , if there is no frequency constraint , the optimal solution always exists for a given optimization problem and contrarily , when the frequency constraint is considered , the frequency will become the key constraint and also the solution existence will be changed by the topology alteration 从一般工程意义上探讨了桁架结构动力学拓扑优化设计解的存在性：无固频约束时，设计变量连续且不考虑上限约束，则优化问题总是有解；考虑固频约束时，频率约束是是否有解的关键约束，并且改变结构拓扑形状可以改变解的存在性。
Here aiming at temperature and traffic load factors , have a systemic study about strcture ' s stress distribution . plan is to make use of ansys to calculate pavement structure ' s distortion with full grade gravelly interlayer carefully through changing each layer ' s thickness and module . next , analysize stress among bottom of surface asphalt layer and top of semi - rigitidy base . lastly . make a conclusion : how to distrube stress and strain about the structure after adding gravelly interlayer 方法是采用ansys对加设级配碎石基层半刚路面结构进行多种参数模拟计算，通过改变结构材料厚度、模量等观察基层和面层应力变化，研究碎石基层怎样调整结构应力而防止了温度和行车荷载产生的过大拉应力，避免基层产生内部裂缝。
In the current account , on one hand china expands its imports , high and new tech imports in particular , on the other hand china begins to modify its export structure , such as declaring to levy advisable export tariffs on part of textiles & clothing and several kinds of metals including aluminum , copper and nickel 在经常项目上，中国一方面扩大进口尤其是高新科技方面的进口，另一方面在出口上也开始改变结构，如宣布对部分纺织品和服装、铝、铜和镍等金属征收适当的出口关税。
