In-hand Manipulation with Fixed and Spring Support Fingers

2017 ◽  
pp. 366-381
Author(s):  
Junhu He ◽  
Sicong Pu ◽  
Jianwei Zhang
Keyword(s):  
Spring Support

scholarly journals Studies on stability of pipes conveying fluid (The effect of a spring support)

1985 ◽  
Vol 51 (463) ◽  
pp. 905-911
Author(s):  
Yoshihiko SUGIYAMA ◽  
Yasuyoshi TANAKA ◽  
Takeyasu KISHI ◽  
Haruo KAWAGOE
Keyword(s):  
Pipes Conveying Fluid ◽  
Spring Support ◽  
Conveying Fluid

Isolation system by leaf spring support

2017 ◽  
Vol 2017 (0) ◽  
pp. J1010205
Author(s):  
Kojiro NAKAJIMA ◽  
Tetsuya WATANABE
Keyword(s):  
Leaf Spring ◽  
Isolation System ◽  
Spring Support

Main Steam Line Constant Spring Support Failures

2011 ◽  
Author(s):  
Gyorgy Szasz ◽  
Christopher Wandell ◽  
Winston Borrero ◽  
Mark Jaeger
Keyword(s):  
Data Analysis ◽  
Data Acquisition ◽  
Steam Line ◽  
Single Source ◽  
Problem Resolution ◽  
Main Steam Line ◽  
Main Steam ◽  
Spring Support ◽  
Operating Units

Several constant spring supports attached to the main steam lines (MSLs) at Palo Verde Nuclear Generating Station (PVNGS) failed over a period of several years. The continued failures presented a need to instrument the MSL piping and supports, such that data could be collected in support of a cause determination and problem resolution effort. Extensive monitoring and data acquisition was performed over an 18-month period in all three PVNGS operating units, encompassing several revisions to the instrumentation configuration. This document presents an account of the project, with a timeline of events, detailed information on the instrumentation and data analysis, and other engineering efforts. Ultimately, no single source of failure was identified, as several potential contributors were uncovered. Modifications were implemented to mitigate the hanger failures, and the instrumentation was used to verify their effectiveness. No further failures have occurred after implementation of the modifications.

Elastic Analysis of Beam-Support Impact

1985 ◽  
Vol 107 (1) ◽  
pp. 64-67 ◽  
Author(s):  
M. A. Salmon ◽  
V. K. Verma ◽  
T. G. Youtsos
Keyword(s):  
Analytical Solutions ◽  
Beam Theory ◽  
Bending Moment ◽  
General Purpose ◽  
Euler Beam ◽  
Piping Systems ◽  
Euler Beam Theory ◽  
Impact Problems ◽  
Fixed End ◽  
Spring Support

The effect of gaps present in the seismic supports of nuclear piping systems has been studied with the use of such large general-purpose analysis codes as ANSYS. Exact analytical solutions to two simple beam-impact problems are obtained to serve as benchmarks for the evaluation of the ability of such codes to model impact between beam elements and their supports. Bernoulli-Euler beam theory and modal analysis are used to obtain analytical solutions for the motion of simply supported and fixed-end beams after impact with a spring support at midspan. The solutions are valid up to the time the beam loses contact with the spring support. Numerical results are obtained which show that convergence for both contact force and bending moment at the point of impact is slower as spring stiffness is increased. Finite element solutions obtained with ANSYS are compared to analytical results and good agreement is obtained.

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