| 1. | Secondly , we achieved the function to draw point and line
其次实现了画点和画线函数。 |
| 2. | The results of comparative analyses in this paper can be used to select and simulate the envelope of earthquake ground motion
文中的比较分析结果可以用于地震动包线函数选择和模拟。 |
| 3. | By means of this index this paper analyzes the gentleness of the peak ’ s slope for the four normally used envelope functions and some of them have been modified
文中据此对四种包线函数的平稳度进行了分析,还对某些包线函数提出了一些改进。 |
| 4. | With the aid of the method for determining damping ratio in structural dynamic experiment the so called stationarity index is used to estimate the gentleness of the peak ’ s slope
文中借助结构动力试验中阻尼比的确定方法,提出用平稳度指数来评价单峰点包线函数平缓程度。 |
| 5. | The main mathematical formulae are : ( the equation is abbreviated ) and ( the equation is abbreviated ) , ( the equation is abbreviated ) and function of draw line : ( the equation is abbreviated )
得到交点的座标为： （方程式略）点的中心位置公式： （方程式略）以及画线函数公式： （方程式略） 。 |
| 6. | By making use of the time dependent covariance and cross covariance formula which used to calculate the non - stationary response under earthquake random excitation and deduced by xiyuan zhou and hu in 1965 , the covariance and cross covariance formula of the four envelope models was deducted and the result of four models compared
本文通过应用周锡元、胡聿贤在1965年提出的计算地震动随机激励作用下非平稳响应的时变自相关方差和时变互相关方差公式,分别推导了四种包线函数模型的时变自相关方差和时变互相关方差表达式,并比较了四个模型的结果。 |
| 7. | According to eigenvalue equation ( general formula ) of the energy method of the plane steel frame structure stability , and considering the restriction of the end of the column of the main steel frame and function of deflection curve gained from the differential balance equation general resolution , we get the equation for calculating the length coefficient of the main frame structure stability of the steel arch gate and the resolutions are also given
根据平面刚架稳定性能量法特征值方程(通式) ，考虑弧形钢闸门主框架柱的柱端约束的特殊情况，求出挠曲线函数(试解函数)通解，得到弧形钢闸门主框架柱稳定性计算长度系数方程。其中弧门主框架主横梁式形框架的临界荷载比较现行规范推荐的有限元法简单方便、结果精确及物理概念明确等优点。 |
| 8. | The evaluation has been made for normally used four envelope functions of earthquake ground motion . being as evaluation standard of the envelope function this paper pointed out that the controlling capability of the parameters involved in functions of the peak position of the envelope with single peak and the shape of the envelope are essential besides simplicity of the formula of envelope function
本文对已经提出的四种经常使用的包线函数模型进行了评价,认为对于评价单峰点包线函数,除了要求形式简单以外,其优劣可以用函数对峰点位置和高峰隆起程度的控制能力作为标准。 |
| 9. | 4 . choosing the reasonable deflection curve function . according to the energy method and the constrained condition of column end of the steel arch gate , the article presents a practical calculating formula for the stability of the main frame structure of the steel arch gate
选择合理的挠曲线函数(试解函数) ，根据能量法及弧门柱端约束条件，提出弧形钢闸门主框架(平面钢框架)稳定性计算的实用解析计算公式，并根据影响弧门主框架稳定性的因素对该公式进行修正。 |
| 10. | This paper relates to some problems about the determination of design ground motion parameters , which include the choice of the attenuation relationship of rock horizontal acceleration response spectrum , the impact of focal depth to rock peak horizontal acceleration and rock response spectrum curves , the choice of intensity envelops function and random input phase , the choice of soil nonlinearity and shear wave velocity , scale of design ground motion response spectrum etc . in the researches of relative aspect , based on a typical section plane of the engineering site , influence of the change of some parameters on design ground motion parameters and the existing errors and corresponding rules are studied by using the method of one dimension model of equivalent linearization
摘要研究了确定设计地震动参数中涉及的若干问题，其中包括基岩水平加速度反应谱衰减关系的选择、震源深度对基岩水平加速度峰值及基岩反应谱曲线的影响、强度包络线函数及输入随机相位的选择、土体非线性特性参数和土层剪切波速值的选择、设计地震动反应谱的标定等问题。 |
