| 1. | Energy response of photomultiplier tubes to neutron irradiation 光电倍增管中子直照灵敏度响应 |
| 2. | From the study of different damping models , it is shown that the damping has greater influence on energy response of structure 文中采用不同的阻尼模型进行研究,分析表明,阻尼对结构的能量反应影响较大。 |
| 3. | The results show that the energy response has an important effect on the slipping isolator efficiency of the vibration characteristics of the structure 结果表明,滑移隔震对于上部结构振动响应的隔震效果受能量方面的机理控制。 |
| 4. | It has been analyzed the vibration status and energy response of a five - floor shear structure with and without fps isolator using the finite element program 摘要以一个摩擦摆隔震五层剪切型结构为例,采用有限元分析程序,计算分析了隔震与非隔震上部结构振动状态和能量响应规律。 |
| 5. | The analytic method of structural seismic energy responses is increasingly attached importance to the international seismic engineering research , and regarded as development tendency in structural seismic design theory 因此,结构地震反应能量分析方法日益受到国际地震工程研究的重视,被认为是今后结构抗震设计理论的发展方向。 |
| 6. | At last , structure damage is estimated by the park & ang damage model , and it is shown that the energy response is useful in seismic response and evaluation of structure damage . and it is feasible that overall damage is evaluated with damage index of d 本文最后采用park - ang模型对结构损伤进行分析,说明了能量反应分析方法在地震反应与破损评估研究中的应用价值,分析表明用d值来评价结构的整体损伤是可行的。 |
| 7. | Not only the analysis and design method based on energy concept can better reflect the whole history and the elastic - plastic performance of the structure under the ground motion , but energy response and energy conversion have definite concept and simple form . it considers the effects of many design factors and has obvious advantage 采用基于能量概念的抗震分析和设计方法能较好地反映结构在强震作用下的全过程及其自身的弹塑性性能,而且能量反应及其转化概念明确、形式简单,包括了多种设计因素的影响,具有明显的优越性。 |
| 8. | So the result is more accurate than old methods . the result of structural energy response based on wavelet provides a practicable method for structure design and design energy dissipation system in structure , this chapter ' s analysis and contrast tell us littlewood - paley wavelet is not suitable for analyzing energy of earthquake ground motion and structural energy response . on the purpose of calculating energy , meyer wavelet must be modified so that its frequency integral is a constant , the result of energy by modified meyer wavelet and harmonic wavelet is practicable , only the later is bigger but in the same energy level 通过三种小波基( littlewood ? paley小波、 meyer小波、谐波小波)下的地震地面运动能量分析以及结构地震能量反应分析说明:直接通过加速度记录可以求得地震动能量,由于小波系数中同时含有时域和频域的能量,由此得出的能量比以往的方法更准确;在此基础上求得了结构的能量反应时程,为结构设计及结构中设计耗能体系提供了具体的方法;通过这一章对比分析得出, littlewood ? paley小波不适合于作地震动能量分析和结构能量反应分析。 |
| 9. | For the purpose of wavelet ' s basic concept and wavelet transform fundamental principle , four wavelets : littlewood - paley wavelet , meyer wavelet , harmonic wavelet and odd exponent wavelet are used to analyze structural response under earthquake ; experimental investigation has been carried out for two - stories frame model ; this paper also analyzes earthquake ground motion energy and structural energy response based on wavelet ; this paper proposes dynamic reliability analysis for structure seismic response based on wavelet 针对小波的基本概念、小波变换的基本原理,本文提出了用四种小波: littlewood ? paley小波, meyer小波,谐波小波,单边指数小波来进行结构地震反应分析、并对二层框架模型进行振动台试验研究、也进行了在小波基下的地震地面运动能量分析和结构地震能量反应、以及结构地震反应在小波基下的动力可靠性分析。 |
| 10. | It is shown by the two - stories frame model shake - table test that the contrast two response of acceleration based on wavelet and experiment draws on such conclusion : littlewood - paley wavelet does not agree with the test , so it is not suitable for structural seismic response , because structural acceleration response is too small . the wavelet transform result of acceleration response based on meyer wavelet , harmonic wavelet and odd exponent wavelet agree with the test , thus they can be used to analyze structural seismic response . the analysis of earthquake ground motion energy and structural energy response based on these three wavelets ( littlewood - paley wavelet , meyer wavelet , harmonic wavelet ) shows that we can calculate earthquake ground motion energy by the record of acceleration , because the wavelet coefficient includes time - domain energy and frequency - domain energy 通过对二层框架模型进行振动台试验研究说明:从小波变换得到的加速度反应和模型上的第一层及第二层的试验测得的加速度比较得出的结论是, littlewood ? paley小波不适合于用来作结构地震反应分析,因为在此小波下的结构加速度反应太小,和实验情况不符; meyer小波、谐波小波、单边指数小波这三种小波从理论上得到的加速度反应同实验测得的加速度过程比较吻合,因此从试验上证明用meyer小波、谐波小波和单边指数小波来作结构地震反应分析是比较合适的。 |