scholarly journals Dynamic modeling method of the bolted joint with uneven distribution of joint surface pressure

AIP Advances ◽  
2018 ◽  
Vol 8 (3) ◽  
pp. 035116 ◽  
Author(s):  
Shichao Li ◽  
Hongli Gao ◽  
Qi Liu ◽  
Bokai Liu
Keyword(s):  
Dynamic Modeling ◽  
Surface Pressure ◽  
Modeling Method ◽  
Uneven Distribution ◽  
Joint Surface ◽  
Bolted Joint

The Method of Tree Dynamic Modeling under Rainfall Field

2013 ◽  
Vol 475-476 ◽  
pp. 1551-1554
Author(s):  
Tie Nan Li ◽  
Shun Yu ◽  
Feng Yang
Keyword(s):  
Dynamic Modeling ◽  
Young Modulus ◽  
Modeling Method ◽  
Tree Modeling ◽  
Almost All

Almost all the fields use tree modeling in society, so it analyses the tree modeling in the academic circles. But it is difficult to find an efficient tree modeling method because its own complexity and wind, rain acting on tree. The object suffers rain power that the force calculated by momentum theorem. And then compare the value of rupture limit to Young modulus. It is determined object to fracture or sway. Then it constructs tree dynamic modeling in the nature.

A Fast Human–Computer Interaction Dynamic Modeling Method for Transmission Tower in Power Systems

2021 ◽  
pp. 1145-1155
Author(s):  
Fuqiang Sun ◽  
Menghua Zhang ◽  
Weijie Huang ◽  
Yongfeng Zhang ◽  
Bo Shi ◽  
...  
Keyword(s):  
Power Systems ◽  
Human Computer Interaction ◽  
Dynamic Modeling ◽  
Modeling Method ◽  
Transmission Tower ◽  
Interaction Dynamic ◽  
Computer Interaction

Analyzing Tree Dynamic Modeling under Outdoors Environment

2013 ◽  
Vol 475-476 ◽  
pp. 1588-1591
Author(s):  
Feng Yang ◽  
Shun Yu ◽  
Tie Nan Li
Keyword(s):  
Dynamic Modeling ◽  
Modeling Method ◽  
The State ◽  
Natural Factors ◽  
Tree Morphology ◽  
Tree Modeling

Nowadays, tree modeling is used in various fields of social widely. Existing tree modeling method ignore trees their own feature so that it construct modeling could not express lifelike tree morphology and then depict the effects attitude of wind and rain and other natural factors in nature. This paper discusses tree dynamic modeling to express the tree multicolored under the wind or rainfall area. Using the theorem of momentum to calculate the instantaneous momentum, and compared to rupture limit, and then depict the state of tree break or mutual extrusion.

scholarly journals Shear Strength of Flat Joint considering Influencing Area of Bolts

2020 ◽  
Vol 2020 ◽  
pp. 1-12
Author(s):  
Hang Lin ◽  
Penghui Sun ◽  
Yifan Chen
Keyword(s):  
Shear Strength ◽  
Jointed Rock ◽  
Calculation Model ◽  
Bolted Joints ◽  
Rock Joints ◽  
Joint Surface ◽  
Influence Coefficient ◽  
Test Results ◽  
Bolted Joint ◽  
Joint Shear Strength

Bolt is popular in the reinforcement of geotechnical engineering, which can significantly improve the strength and stability of jointed rock mass. For bolted joint, the bolting area is a certain scope instead of the entire joint surface; therefore, it is necessary to study the effect of bolt influencing area on the shear strength of rock joints. In this paper, a series of laboratory direct shear tests were executed on the bolted joints to explore the influence of bolts on the joint shear strength, as well as the influencing area of bolt. Via successively changing bolting angle and bolt number, the shear stress-shear displacement curves of bolted joints were recorded and the variation law of shear strength was analyzed. Based on the assumption of the circular influencing area of bolt, the influence coefficient m (defined as the diameter ratio of the influencing area to the bolt) was introduced to establish the theoretical calculation model of the shear strength of bolted joint, which was verified by test results. Furthermore, the value of m was changed, and the shear strengths of bolted joints under different bolting condition were calculated to compare with the test results. The average relative error Eave was selected to determine the optimal value of m under the corresponding bolting condition, and it tends to sufficiently small values under the case of m > 30 for one-bolted joint and m > 25 for two-bolted joint, as well as m > 20 for three-bolted joint, which demonstrates that m can be applied to effectively calculate the actual influencing area of bolt.

scholarly journals Dynamic Modeling and Experimental Verification of A Cable-Driven Continuum Manipulator With Cable-Constrained Synchronous Rotating Mechanisms

2021 ◽  
Author(s):  
Xudong Zheng ◽  
Taiwei Yang ◽  
Xianjin Zhu ◽  
Zhang Chen ◽  
Xueqian Wang ◽  
...  
Keyword(s):  
Dynamic Modeling ◽  
Friction Model ◽  
Modeling Method ◽  
Stick Slip ◽  
Dynamical Behaviors ◽  
Ale Formulation ◽  
Two Factors ◽  
New Type ◽  
Continuum Manipulator ◽  
Coulomb Friction Model

Abstract The cable-driven segmented manipulator with cable-constrained synchronous rotating mechanisms (CCSRM) is a new type of continuum manipulator, which has large stiffness and less motors, and thus exhibits excellent comprehensive performance. This paper presents a dynamic modeling method for this type of manipulator to analyze the friction and deformation of the cables on the dynamical behaviors of the system. First, the driving cables are modeled based on the ALE formulation, the strategies for detecting stick-slip transitions are proposed by using a trial-and-error algorithm, and the stiff problems of the dynamic equations are released by a model smoothing method. Second, the dynamic modeling method for rigid links is presented by using quaternion parameters. Third, the connecting cables are modeled by torsional spring-dampers and the frictions between the connecting cables and the conduits are considered based on a modified Coulomb friction model. Finally, the numerical results are presented and verified by comparing with experiment results. The study shows that the friction and cable deformation play an important role in the dynamical behaviors of the manipulator. Due to these two factors, the constant curvature bending of the segments does not remain.

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