natural stiffness 中文意思是什麼
natural stiffness
解釋
固有剛度-
But this method could n ' t reflect the influence of the variance of pile capacity on capping beam internal force and the partaking of soil to the load. combined with the item " the optimal design theory and research of pile capping beam " financed by natural science fund of hunan province, a new method which can consider the pile - soil interaction and tide over the disfigurement of the winkler soil model is used to adjust the foundation base reactions in this paper. by this method, the proper solution about the internal force of capping beam can be achieved and the relative stiffness and the relative position of soil spring are thought out well
本文結合湖南省自然科學基金項目「樁基承臺梁優化設計理論與方法研究」 ，考慮梁下土體和基樁對承臺梁的共同作用，提出了能對梁下地基反力進行自動調整的一種新型方法，其克服了文克爾地基模型所存在的缺陷，該法在調整過程中，充分考慮了梁下各土體彈簧之間的相對剛度，相對位置，更接近承臺梁的實際工作情況，有利於獲得承臺梁內力的正確解答。 -
The resonance conditions of the train - bridge system are affected by the span, total length, lateral and vertical stiffness of the bridge, the compositions of the train, and the axle arrangements and natural frequencies of the vehicles
車橋系統的共振條件與橋梁跨度、長度及豎向和橫向剛度，列車編組、車輛軸距參數及車輛的自振頻率等因素有關。 -
Point to above problems, under the financial support of the national natural science foundation ( exploration of high tech and new concept and new conceive ), the excellent young teachers program of ministry of education and national excellent doctoral dissertation special foundation, the static and dynamic real - time computation of elasticity - plastic mechanics, solving method of fuzzy finite element and other problems were studied in this paper. and some achievement was gained as following : ( 1 ) based on the positive definiteness of system stiffness matrix of finite element that was modified and the form of potential energy function of elastic body, the linear system of saturation mode ( lssm ) was introduced into the neural computation of finite element, by which the no - error solving of finite element neural net computation was realized in theory
針對上述問題，在國家自然科學基金（高技術新概念新構思探索） 、教育部優秀青年教師資助計劃、高等學校全國100篇優秀博士學位論文作者專項基金等的資助下，本文對彈塑性力學問題的動靜態的實時計算、模糊有限元的求解方法等問題進行了系統和深入的研究，取得了以下成果： （ 1 ）根據有限元總剛矩陣經修正後具有正定性的特點以及彈性體勢能函數的具體形式，將飽和模式的線性系統（簡稱為lssm系統）引入到有限元的神經網路計算中，在理論上實現了有限元神經網路計算的無誤差求解。 -
The cable sag and bending stiffness effects are studied on the higher natural frequencies of cable vibration. it is found that the differences of the higher adjacent frequencies go to the fundamental frequency of the taut string theory even though the cable sag or bending stiffness is included. this unique characteristic of cable vibration is used to determine the cable tension with the well - known taut string theory
2 .考慮垂度和抗彎剛度對高階自振頻率的影響，探討了索相鄰頻率之差，發現索的高階頻差就是弦振動理論的基頻，利用這一特性，分析了頻差法測索力的精度和適用范圍。 -
It is shown that the effects of the stiffness and inertia of the piezoelectric element that lead to higher first natural frequency on the natural frequencies of the beam are significant, and that of the elastic modulus of the bonding layer is small
研究表明，壓電元件的剛度和慣量對梁的頻率影響很大，變截面智能壓電梁的一階固有頻率總是高於等截面梁的固有頻率。 -
This paper bring out design method of inverse eigenvalue problem, which adapts to general structures with linear parameters, namely coefficients of all or partial elastic component and inertial component are treated as design parameters, for given some order natural frequency and corresponding vibrating mode, all of useable designing parameters will be got through solving a linear system of equations, thereby stiffness matrix and mass matrix of actual structure are constructed. this paper also discusses existence condition and unique of results
提出了適用於具有線性參數的一般結構的逆特徵值問題的設計方法，即以系統的全部或部分的彈性元件與慣性元件的系數為設計參數，對于預先給定的若干階固有頻率及相應振型，通過求解一線性方程組即可確定全部實際可行的設計變量，從而構造出實際結構的剛度矩陣和質量矩陣，並論證了解的存在性與唯一性。 -
Each parameter affecting to its natural frequency and vibration characteristic is analyzed ( such as the supporting stiffness coefficient, the supporting distance, the internal pressure and the velocity of fluid in the pipeline )
分析了各參數（支承剛度系數、支承跨距、管內壓力、管內流體速度）對振動特性的影響；對速度波動、壓力波動對固有頻率的影響作了探討。 -
( 3 ) furthermore, the stiffness effect induced by the infill walls makes the natural period of the frames decrease, which makes the earthquake forces put on the structures increase
3 .另外，填充墻剛度效應的存在使得結構自振周期減小，從而使作用於整個建築上的水平地震作用增大。 -
Testing results indicated that in the state of serviceability, the members ’ natural frequencies and dynamic - stiffness are descent because of damage. and the degree of damage can be detected by the descent degree of natural frequencies and dynamic - stiffness
試驗結果表明，梁損傷后固有頻率和剛度均有所下降，建議可對不同荷載下構件頻率下降程度進行分析與總結，進而由固有頻率下降程度來診斷結構的損傷程度。 -
The stiffness of ems is controllable, and taking it as the kernel, an emdva which natural frequency can adjust according to the frequency of the excitation force is designed. the emdva can adjust its natural frequency to keep up with the frequency of the excitation force acted on the main mass, reach in the almost perfect status of dynamic harmonization absorption and obtain satisfactory absorption effect
該電磁彈簧的剛度值是可控的，以此電磁彈簧為核心，設計了一種固有頻率可實時調整的電磁式動力吸振器，該動力吸振器能夠調節其固有頻率與作用在主質量上的激勵力的頻率保持一致，從而達到接近理想的動力調諧吸振狀態，獲得滿意的吸振效果。 -
Then, the hilbert transform is applied to each modal response to obtain the instantaneous amplitude and phase angle time histories. a linear least - square fit procedure is proposed to identify the natural frequency, damping ratios, physical mass, damping and stiffness matrices from instantaneous amplitude and phase angle for each modal response
然後對各階模態響應進行hilbert變換，得到瞬態幅值和相位角的時間歷程，再運用線性最小均方擬合來識別自然頻率、阻尼比、質量、剛度和阻尼矩陣。 -
The stiffness of the former is less than the latter, and the natural periods of the former is longer than the latter
前者模型的剛度較後者柔，其周期較後者長。且樓板模型的選取對結構的扭轉影響較大。 -
The mechanic character, destroying pattern, the ductile and dissipation energy capacity of this composite structure under the earthquake have been clarified. the stiffness degradation, natural frequency, damping ratio of this structural system with the development of intensity of earthquake have also been investigated. with consideration of the top displacement, drift of story and micro - strain of longitude steel bars, the equivalent shell wall method has been presented in order to simplify the design of such type structure
通過試驗，掌握了該結構體系在水平地震荷載作用下的受力特點、變形與耗能性能、結構的破壞形態等力學指標：得到了結構在不同地震烈度條件下的剛度變化、自振頻率、阻尼比等動力特性；綜合結構的頂點位移、層間轉角以及鋼筋的微應變，提出了適合於該結構體系簡化設計的「等效剪力墻法」 。 -
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
其具有空間剛度大、體系穩定、抗震性能好、受力合理等優點，但由於尺寸巨大，暴露在惡劣環境中，且受到多為隨機性載荷作用，因此服役環境相當惡劣。 -
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 too much random load, and exposing in bad environment, slts are affected easily by the natural disaster
網架結構具有空間剛度大、體系穩定、抗震性能好、受力合理等優點，但是網架結構的尺寸巨大、受到的載荷作用大多具有隨機性，並時刻暴露在惡劣環境中，易受自然災害的影響。 -
Testing of paper and board - determination of the bending stiffness - part 1 : length of natural frequency method
紙和紙板的試驗.測定抗彎剛度.第1部分:固有頻率長度 -
Structures. frequency change square ratio is applied as a parameter to locate corrosion and cracking damage. a chart, which relates the loss in stiffness with changes in natural frequencies, is proposed to identify the degree of corrosion and cracking damage
根據結構銹裂損傷前後的頻率平方變化比進行銹裂損傷定位；根據結構銹裂損傷后頻率降低與剛度降低的關系，繪制結構銹裂損傷程度識別圖，用於銹裂損傷程度識別。 -
With synthesizing the relevant other internal and external researchers " the achievements of theory and the results of experiment, the follow work have been done in this project : revising the formulas of ground stiffness coefficient and the mass of vibrating soil and the dynamic affecting degree of depth, which apply the theory of elastic half - space and the knowledge of the soil mechanics and consider the influence of the soil characteristic and inertial action, the interaction between foundation and ground, the diverse load ; making the model of ground and foundation system calculating natural frequency by using the big - scale software supersap which is for special purposes of finite element analysis ; according to the experiment analysis, correcting and adjusting the finite element model in order to have it accord with the fact and meet the engineering demands ; doing the vibrating experiment for testing the results of the theoretical analysis and the finite element calculation ; summing up some regulars of the ground stiffness
本文綜合參考了國內外其他學者的理論成果和實驗結果，進行了如下研究工作：運用彈性半空間理論和土力學的知識，考慮土體特性和慣性作用、基礎與地基的相互作用以及不同荷載形式等因素的影響，對動力機器基礎進行了嚴密地理論分析，修正了地基剛度、參振土質量和動力影響深度的計算公式；利用專門用於有限元計算的大型分析軟體supersap對地基基礎體系進行了建模計算，根據實驗分析，對有限元模型不斷地進行修正和調整，使其更加符合實際情況，滿足要求；通過振動實驗對理論分析和有限元計算結果進行了驗證；總結出了一些地基剛度的變化規律。 -
An approach has been made upon problems of tuning natural frequency of variable stiffness elastic support of 3d vibration strengthening polishing vibration table
對三維強化、拋光振動臺變剛度彈性支承調諧固頻的問題進行了探討。
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