Strength design method for tubing hanger of subsea christmas tree against big temperature difference

2014 ◽  
Vol 28 (5) ◽  
pp. 659-670 ◽  
Author(s):  
Xiao-lan Luo ◽  
Yu-hong Gu ◽  
Chang-ling Liu ◽  
Rui Qin ◽  
Hong-lin Zhao ◽  
...  
Keyword(s):  
Temperature Difference ◽  
Design Method ◽  
Christmas Tree ◽  
Strength Design ◽  
Tubing Hanger

Application of the Strength Design Method for Flexural Members at Prestress Transfer

PCI Journal ◽  
2003 ◽  
Vol 48 (5) ◽  
pp. 62-74 ◽  
Author(s):  
Panya Noppakunwijai ◽  
Maher K. Tadros ◽  
Chuanbing Sun
Keyword(s):  
Design Method ◽  
Flexural Members ◽  
Strength Design

scholarly journals Shear walls of limited ductility

1980 ◽  
Vol 13 (2) ◽  
pp. 144-161
Author(s):  
L. M. Robinson
Keyword(s):  
Reinforced Concrete ◽  
Energy Dissipation ◽  
Design Method ◽  
Shear Walls ◽  
Strength Design ◽  
Earthquake Resistant ◽  
Heavy Damage ◽  
Suggested Classification ◽  
Classification And Treatment

The design and detailing of earthquake resistant reinforced concrete shear walls of limited ductility designed by a modified strength design method are discussed. Suitable methods for the evaluation of actions and the determination of internal actions
are advanced, having regard to energy dissipation and the consequences of heavy damage or of collapse. Discussion is not restricted to uniform walls, but is extended to walls with openings, for which a suggested classification and treatment is presented, thus allowing for suitable design techniques for walls transitional between uniform walls and frames to be determined. Applications 
of the proposals are illustrated in an Appendix.

Strength Optimization of Infant Pop-Up Seat Frame Using Discrete Material and Thickness Optimization

2021 ◽  
Vol 11 (3) ◽  
pp. 1-20
Author(s):  
YeongJo Ju ◽  
Euysik Jeon
Keyword(s):  
Optimal Design ◽  
High Strength Steel ◽  
Design Method ◽  
High Strength ◽  
Optimization Method ◽  
Design Criterion ◽  
Thickness Optimization ◽  
Element Analysis ◽  
Strength Design ◽  
Seat Frame

In this paper, the authors proposed an optimal design method for the strength design of infant pop-up seat frame combined with rear seats for infants, children, and adults, not removable booster seats or car seats. Frame strength design was performed using discrete material and thickness optimization (DMTO) method considering high strength steel (HSS) and advanced high strength steel (AHSS). Structural design using the Section 4 link mechanism was performed, and the weakness of the seat frame due to static load was confirmed through finite element analysis. An optimal design criterion was established by carrying out a case study to derive the limiting conditions according to static and dynamic loads. In consideration of these criteria, the optimal design according to d-optimal and discrete Latin-hypercube (DLH) was performed among the design of experiments (DOE). And the strength of the pop-up seat frame for infants according to each DOE was checked, and the strength optimization method was suggested by comparing the lightweight ratio.

GS0303 Development of Fatigue Strength Design Method for Impellers Produced by Laser Slot-welding

2008 ◽  
Vol 2008 (0) ◽  
pp. _GS0303-1_-_GS0303-2_
Author(s):  
Masaaki Iwasa ◽  
Ryujiro Udo ◽  
Takeshi Tsukamoto ◽  
Tetsuya Kuwano ◽  
Taiji Hashimoto ◽  
...  
Keyword(s):  
Fatigue Strength ◽  
Design Method ◽  
Strength Design

Optimizing Study of Top Beam Structure of Electrostatic Precipitator Casing

2012 ◽  
Vol 215-216 ◽  
pp. 510-517
Author(s):  
Xiao Meng Ji ◽  
Deng Feng Wang ◽  
Yuan Qing Wang ◽  
Yong Jiu Shi
Keyword(s):  
Temperature Difference ◽  
Pressure Difference ◽  
Evaluation Method ◽  
Electrostatic Precipitator ◽  
Design Method ◽  
Internal Force ◽  
Air Pressure ◽  
Optimized Design ◽  
Beam Design ◽  
Steel Consumption

An optimizing design idea is produced for the structure of top beam of electrostatic precipitator casing. The thermos cabinet and the original box shaped top beam of casing compose a truss beam system whose overall section height is increased greatly, resultantly, the bend bearing capacity of truss beam increases significantly than that of the original top beam of casing. Consequently, the wall thickness of box section of the original top beam can be reduced so that the steel consumption can be saved. Based on a practical project, the load effects on truss beam were investigated, respectively, including the air pressure difference and the temperature difference among external layer, thermos cabinet and interior of casing. Besides, the evaluation method of internal force in truss beam was investigated and the selective preference of truss beam configuration was conducted. The unfavorable load cases of air pressure difference and temperature difference are proposed for truss beam design. Besides, the accurate evaluation method of internal force and the design method for economical configuration of truss are proposed. In consideration of load bearing effect of thermos cabinet layer, the optimized design of truss beam originating from box sectioned top beam can ensure the truss works safely and reduce the steel consumption significantly.

scholarly journals HEAT EXCHANGER NETWORK SYNTHESIS CONSIDERING CHANGING PHASE STREAMS

2004 ◽  
Vol 3 (2) ◽  
Author(s):  
F. S. Liporace ◽  
F. L. P. Pessoa ◽  
E. M. Queiroz
Keyword(s):  
Heat Exchanger ◽  
Temperature Difference ◽  
Design Method ◽  
Enthalpy Change ◽  
Network Synthesis ◽  
Pinch Point ◽  
Specific Heats ◽  
Temperature Ranges ◽  
Heat Exchanger Network Synthesis

The Pinch Design Method was developed considering one-phase streams, with constant specific heats (Cp) throughout streams’ temperature ranges. Its first stage, the determination of utilities targets and pinch point (PP), is ruled by the number of streams, their temperatures and MCp. But, for changing phase streams, the usual description of the Cp behavior by a constant value can lead to errors in this stage and, hence, in the synthesis one. This work proposes a procedure to deal with these streams and discusses its results through an example involving multicomponent streams. First, bubble (BP) and dew (DP) points of the streams are estimated. Then, changing phase streams are split into sub-streams, using BP and DP as bounds. For each one, an effective Cp is estimated as the division of the enthalpy change by the respective temperature difference. Results obtained show significant changes on the PP, utilities targets and network proposed structure.

Ultimate Strength Design of Racks for Jack-Up Units

1986 ◽  
Vol 108 (3) ◽  
pp. 413-423
Author(s):  
Hiroshi Honda
Keyword(s):  
Ultimate Strength ◽  
Cross Section ◽  
Elastic Stress ◽  
Shear Fracture ◽  
Design Method ◽  
Design Criteria ◽  
Fracture Test ◽  
Strength Design ◽  
The Subject ◽  
Jack Up

The subject of paper discusses an approach taken in evaluating the load acting on racks for jack-up units (the jack load) together with its computed results. The fracture test of a full-scale rack for a jack-up unit and a finite-element elastic stress analysis for this rack were also conducted. These results led to new design criteria for the ultimate strength design method of racks for jack-up units, when exposed to a combination of loads including stormy conditions. Typically, the ultimate strength of the racks was evaluated on the assumption that the cross section of the rack tooth plastically collapses at its root. During this investigation, it was shown, however, that the ultimate strength of the racks needs to be evaluated also on the premise that the rack tooth is subject to shear fracture caused by its mating pinion tooth.

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