tructural inherent character and exterior excitation(confirm loads and conditional random factors) are combined to separate dominant modes and its modal participating factor from practical work state by means of experimental modal analysis technique and structure intension theory.
将结构固有动力特性和外部环境激励(确定性荷载及环境随机因素)联系在一起,运用实验模态分析技术和结构强度理论,分离出实际工作环境下结构的主导模态及其模态参与因子,从而将一静动耦合力作用下的空间复杂应力状态问题转化为各阶模态相互作用下的简单应力状态(模态形态下)问题进行结构动强度分析,对损伤结构在各阶模态对应动应力和静载相互作用下的破坏形式及其规律做合理的解释。
In order to analyze the contribution-significant modes and the mode coupling effects for the wind-induced vibrations,a Ritz-POD method is proposed for identifying the contribution-significant modes,which takes into account the vibration-participating ability of each natural mode,and the similarity between the mode and the spatial distribution of the fluctuating wind load.
为研究网壳结构风振响应的主要贡献模态分布规律及模态耦合效应,有利于提高结构风振响应的计算效率,利用Ritz-POD法,综合考虑各结构振型自身参振能力的强弱及其与脉动风压空间分布模式之间的关系来识别单层球面网壳风振的主要贡献模态;利用模态广义位移协方差矩阵的特性分析其模态耦合效应。
In the analysis of wind-induced vibrations of single-layer reticulated shell structures,it is found that there are some contribution-significant modes of high orders to the vibrations.
因此,研究网壳结构风振响应的主要贡献模态分布规律有利于提高结构风振响应计算的精度和效率。
The dynamic moduli at various temperatures and loading frequencies were measured for each asphalt mixture used in an asphalt pavement with flexible bases,and the dynamic modulus master curves and time-temperature shift factors were determined according to the time-temperature superposition principle.
实测了某柔性基层沥青路面试验段各层沥青混合料在不同温度和荷载作用频率下的动态模量,利用时间-温度转化原理得到了各自的动态模量主曲线和时间-温度转化因子,并结合路面结构内的实测温度和较成熟的荷载频率预测方法,分析了路面结构内温度和荷载频率的变化对沥青混凝土力学参数的影响。
The dynamic moduli were tested for every asphalt mixture used in an asphalt pavement with flexible bases,and the dynamic modulus master curves and time-temperature shift factors were determined for each mixture.
对一柔性基层沥青路面段各层沥青混合料在不同温度和荷载作用频率下进行了动态模量试验,根据试验结果形成了各混合料的动态模量主曲线和时间-温度转化因子,并通过埋设传感器实测了路面结构内的温度场,利用等效路面厚度法对路面结构内不同深度荷载作用频率和应力峰值个数随车速、轴载类型和路面温度场的变化规律进行了分析。
IDENTIFICATION OF THE MAIN CONTRIBUTION MODES OF WIND LOAD OF SUPER-TALL BUILDINGS BASED ON POUBLE MIDAL TRANSFORMATION
超高层建筑基于双模态转换的风载主模态识别
The Model Analysis of the Ceramic Bearing Electric Spindle;
陶瓷轴承电主轴主轴的振动模态分析
The dynamic characteristics of vibration system depend mainly on its modality parameters.
振动系统的动态特性主要取决于其模态参数。
Study on the Simulation of the Pedestrian Flow Based on the Multi-agent System;
基于多智能主体的人群流动形态动态模拟研究
Studies on the Simulation of Key Agronomic Characteristics for Potato;
马铃薯主要农艺性状的动态模拟研究
Attitude Evaluation:Inter-subjective Construction of Persuasive Mode;
态度评价:主体互联性劝说模式构建
The Dynamic Alliance Model based on Adaptive Business Agent;
基于自适应企业主体的动态联盟模型
Evaluation on Major Agricultural Management Models in Bijie Prefecture;
毕节地区主要生态农业经营模式评析
The Data Model is About the Main Function and Formindex of Human body;
人体主要机能与形态指标的数学模型
Dynamic Facial Expression Synthesis by Active Appearance Model
利用主动外观模型合成动态人脸表情
Application of Model Analysis in Headstock Optimization Design
模态分析在主轴箱优化设计中的应用
Test Modal Analysis of High Speed Magnetic Suspension Grinding Spindle
高速磁悬浮磨削主轴的试验模态分析
Research on high peak power active-active transient mode-locked pulsed laser
高峰值功率主动-主动瞬态锁模激光技术研究
Vibration modeling of a partially ACLD beam with assumed mode method
部分主动约束阻尼梁振动的假设模态法建模
Fuzzy dynamic model and neural network control of semi-active suspension
半主动悬架模糊动态建模与神经网络控制
Simulation of the leading mode of Asian-Australian monsoon interannual cariability with the Beijing Climate Center atmospheric general circulation model.
BCC大气环流模式对亚澳季风年际变率主导模态的模拟
There are mostly two models in attitude measurement: cumulative model and unfolding model.
态度测量主要应用两种模型:累进型与展开型。
Principal modes of interannual and decadal variability of summer rainfall over South America.
南美夏季降水的年际，和年代际变化的主要模态。