| 1. | Crack growth model and testing research of high strength steel under random load
高强度钢随机载荷下裂纹扩展模型 |
| 2. | The finite element analysis methods for plate - beam composite structures with random physical parameters under the random loads action are studied
摘要以随机物理参数板梁组合结构为对象，研究了其在随机力作用下的有限元分析方法。 |
| 3. | During the period of their serves , many engineering structures are inevitable to endure time - dependent random loads , and dynamic damage or failure will be the main failure modes
许多工程结构在服役期间，将不可避免地受到与时间有关的随机激励的作用，动力损伤或破坏将是其主要失效模式。 |
| 4. | Because the complex mode analysis takes mutual effect between the structure and water into account , the better precise and reasonable responses of the offshore platform under random loads can be achieved
当采用考虑结构与流体相互作用的复模态分析方法，将使海洋平台结构在随机荷载作用下的响应分析更为精确和合理。 |
| 5. | According to compatible relationships of the rotation angles on the boundaries of rectangle thin plates , the unknown bending moment of each plate is obtained , so the analytic results of the box structure under random loads can be evaluated
通过板与板的边界转角协调分析，求解出每块板四边所受的分布弯矩，从而得到任意荷载作用下箱型结构的解析解。 |
| 6. | Utilizing the characteristics of quick response , easy for automatization and easy to realize frequent commutation of the hydraulic system , this mechanism can be employed in composing the compound movement in horizontal and vertical direction , which could realize accurate simulation of the motion law for motorcycles and automobiles under the effect of random load in high frequency
利用液压系统反应快、便于自动化、易于实现频繁换向的特点，该机构可用来合成水平、垂直方向的复合运动，实现对摩托车、汽车等在高频随机载荷作用下运动规律的精确模拟。 |
| 7. | In first part of the thesis , by a review of the research on aircraft sonic fatigue , the formulas for calculating natural frequencies of the typical aircraft skin - panel structure with four edges simply - supported or four edges fixed - supported were drawn , the response of displacement and stress was analysed under the condition of random white noise loading with the steady - state or unsteady - state . the procedure how to use data of s - n curve under constant loading for predicating the fatigue life of skin - panel subjected to random loading was shown
通过对声疲劳问题研究的回顾，根据典型飞机蒙皮壁板模型，整理了四边固支，四边简支两种边界条件下多阶模态固有频率，非平稳及平稳随机白噪声载荷下的位移和应力响应，以及如何从等幅s ? n曲线求得随机载荷应力下的疲劳寿命。 |
| 8. | Abstract : in this paper , we study the random equation to elastic caminal rectangle plate under single concentrated random load by random vibration theory , and discuss the dynamic response to it by separating the variable , and study the frequency response function and unit pluse response function to the load and response
文摘:运用随机振动理论，推导了弹性矩形薄板在单个随机集中载荷下的振动方程，并用分离变量法讨论了其动力响应，研究了对应于激励与响应的频率响应函数和单位脉冲响应函数。 |
| 9. | In the one hand , there are many advantages in slts such as high space stiffness , moderate stability , good earthquake resistance capacity , sound bearing capacity . in the other hand , due to magnitude dimension , subjected to random load , and exposing in bad environment , slts are affected easily by the natural disaster
其具有空间刚度大、体系稳定、抗震性能好、受力合理等优点，但由于尺寸巨大，暴露在恶劣环境中，且受到多为随机性载荷作用，因此服役环境相当恶劣。 |
| 10. | In the paper , firstly , present the formulation and application of proper orthogonal decomposition of covariance and cross - power spectral density matrices are presented in the analysis of wind load effects on structures . then the dynamic response of linear structures subjected to random loads is analyzed by a technique called double modal transformation ( dmt ) that is expressed through a double series whose terms depend on structural and loading modes
本论文中首先通过求相关矩阵和互功率谱密度矩阵特征值问题给出了本征正交分解的公式，并利用pod与结构模态相结合的双模态方法来分析结构的动态响应，主要讨论了截断高阶荷载模态对风致响应的影响。 |
