modified stiffness 中文意思是什麼
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( 2 ) based on the existing theory of lateral load distribution rule, and combined the structure characteristic of pre - stressed lager cantilever composite beam with corrugated steel webs, this thesis proposed the modified rigid beam method. taking this method, it is facilitated to compute the lateral load distribution factor of bearing composite cantilever beam with variable - stiffness under the load in arbitrarily position
（ 2 ）以現有的橫向分佈理論為基礎，結合大懸臂波形鋼腹板組合挑梁的結構特點，提出了修正剛接梁法的計算方法，能夠方便地計算變剛度懸臂組合梁任意點位的橫向分佈系數。 -
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。 -
Consideration of dimensional effect of pile structure using modified stiffness matrix of beam - rod element
用修正的梁桿單元剛度陣考慮樁的尺寸效應 -
An effective and well robust unstructured dynamic grid method is developed to solve the unsteady aerodynamic problem. on the basis of classic linear spring analogy, several modified methods for the linear spring stiffness coefficient is introduced
在現有的經典線性彈簧方法的基礎上，通過對網格單元邊、面和體的考慮，引入了對線性彈簧倔強系數諸如抗拉、抗扭和抗壓等多種修正方法。 -
In chapter 3, the stability of permanent magnet bearings is analyzed. and the modified methods which can improve the stability of the permanent magnet bearings are studied. the computation expressions of the magnetic force and stiffness of the permanent magnet bearings are derived
第三章對永磁軸承的穩定性進行了分析，提出了改善穩定性的方法，推導了永磁軸承磁力與剛度計算公式，對各種構型永磁軸承的性質進行了分析研究。 -
In the analysis, a cfst arch ( single tube ) is first divided into a finite number of straight beam elements. according to the virtual work principle and the modified newton - raphson iteration method the tangent stiffness matrix considering double nonlinear properties is established. with regard to the non - equilibrium forces, the material nonlinear property along the height of the section and the length of the element is considered and the computation accuracy is improved as a result
本文首先將拱肋劃分為一系列的直梁單元，運用虛功原理和修正newton - raphan數值迭代演算法的基本原理準確推導了拱肋直梁單元的非線性切線剛度矩陣；在不平衡力方面考慮了沿截面高度和單元長度方向材料非線性的發展過程，提高了計算精度；再根據得到的切線剛度矩陣採用荷載增量步內修正newton - raphan迭代的增量迭代法進行了求解。 -
Steel frame with welding joint easily occur brittle collapse because of having a low ductility at joints then ， a semi - rigid connected steel frame has large the energy absorption capacity which can resist dynamic loads and the using steel qualities of bracing system and joints are small so adopting a semi - rigid jointed steel frame is economical and stable but for semi - rigid connections are complex and variable ， in conventional analysis and design of steel structures ， it is usually assumed that the connections between columns and beams are either rigid or pinned the analysis of steel frames adopting the assumption can simplify the procedure of analysis and design ， but cannot precisely reflect structural practical circumstance and the errors of calculating results are large ， even ， get incorrect conclusions semi - rigid connection was referred to in chinese code for design of steel structures ( 2001 ， 10 ) ， however ， it isn ’ t specified how to apply semi - rigid joints in design in fact it cannot be carry out the purpose of the paper give a calculating method that accords practical engineering and easily put into effect worthwhile it is going to promote the development of semi - rigid jointed steel frame in design and heighten structural stability in the paper ， at first some commonly employed methods for the modeling of connection behavior are introduced richard abbott function modeling of connection is adopted for extended end plate bolted connection by the 34 test data comparing to regression analysis indicate richard - abbott function modeling of connection represents an excellent fit to test data then after a semi - rigid joint behavior can be modeled as a finite stiffness rotation spring ， base on rotation and displacement equation derive the element stiffness matrixes with semi - rigid connections where the effects ofj ointed flexibility geometric non - linearity and shear forces in the connection deformations have been considered in and fixed - end forces are modified finally, a program for calculating semi - rigid with incremental - iterative method has been
本文的目的就是為半剛性連接鋼框架的設計提供一種既符合工程實際又簡便易行的計算方法，供規范使用過程的補充、延伸或參考；同時，也將促進半剛性連接鋼框架設計技術的發展，為提高結構安全性能、節省工程成本發揮應有的作用。本文首先介紹了常見的幾種應用較為廣泛的樑柱連接彎矩轉角關系模型，在分析比較的基礎上，選用richard ? abbott函數模型作為外伸端板連接彎矩轉角關系模型，通過對34個外伸端板連接的實驗數據與回歸分析得到的參數比較可知，經回歸分析得到的此模型參數與實驗數據符合較好。然後用彈簧表徵連接點的轉動剛度，根據梁的轉角位移方程推導出半剛性連接的剛度矩陣，在單元剛度矩陣中考慮了節點柔性、幾何非線性和剪切變形的影響，並對固端力進行了修正，最後用增量迭代法編制有限元程序進行計算和分析。 -
Then after a semi - rigid joint behavior can be modeled as a finite stiffness rotation spring, base on rotation and displacement equation derive the element stiffness matrixes with semi - rigid connections where the effects of jointed flexibility and shear forces in the connection deformations have been considered in and fixed - end forces are modified. finally, a program for calculating system reliability of semi - ridge steel frames with monte carlo method and finite element analysis has compiled for calculating and analyzing. by calculating results of several examples for steel frame in semi - rigid joints case show the change of joint stiffness and other kinds of factors affect the system
接著本文在介紹和分析半剛性連接彎矩和轉角關系模型的基礎上，用帶有轉動剛度的彈簧表徵半剛性連接，推導出半剛性連接的剛度矩陣，對固端力進行修正，同時考慮了剪切變形的影響，編制了半剛接鋼結構平面框架的有限元程序bhpfl ，並在其基礎上編制了基於蒙特卡洛法的montecarlo - bhpfl有限元相結合的方法，進行體系可靠度的分析。 -
Meanwhile, the influence of overlapping area on the beam foundation is modified by means of load amendment, and the influence of overlapping area on the pile - beam foundation is modified by means of stiffness amendment. by applying the model of stress - spread in shear - displacement method to describe the stress spread between piles and the geddes hypothesis to determine the stress distribution of pile, a displacement coefficient is deduced to calculate the flexibility matrix and the coefficient for load distribution of pile. considering the stiffness of foundation beam, the equation of the interaction of pile - beam - soil is established and an analysis program is developed related to the interaction
本文通過採用剪切位移法中的應力擴散模型考慮樁與樁之間的應力傳遞作用；採用geddes假定確定樁身和樁端的應力分佈，推導位移系數，並以此為基礎求得柔度矩陣；樁身和樁端的應力分佈大小由樁的荷載分配系數控制，通過迭代法可以求出樁的荷載分配系數；在考慮基礎梁對樁?梁?地基土共同作用的剛度貢獻基礎上，提出了樁?梁?地基土共同作用方程，並通過本文作者開發的相應計算程序，經實例計算驗證了本文方法的正確性。 -
Through the analysis on the problem of lateral sway in ss9 modified electric locomotive after speed - up, it is proposed the solution to increase the primary lateral positioning stiffness
摘要通過對ss9改進型電力機車提速后出現橫向晃動問題進行分析，提出了增大機車一系橫向定位剛度的解決方案。
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