Shock resistance performance analysis of surface warships steering electric control cabinet based on DDAM

2021 ◽  
Author(s):  
Y. Cairui ◽  
Z. Guoping ◽  
L. Zhenshan ◽  
W. Yuanyin ◽  
S. Xuyao
Keyword(s):  
Performance Analysis ◽  
Control Cabinet ◽  
Electric Control ◽  
Shock Resistance ◽  
Resistance Performance

Ice Resistance Performance Analysis of Double Acting Tanker in Astern Condition

2014 ◽  
Vol 69 (7) ◽  
Author(s):  
Efi Afrizal ◽  
Jaswar Koto
Keyword(s):  
Performance Analysis ◽  
Open Water ◽  
Hull Form ◽  
Propeller Design ◽  
Objective Parameter ◽  
Form Design ◽  
Hull Form Design ◽  
Design Analyses ◽  
Resistance Performance ◽  
Ice Resistance

An optimum procedure of hull form design for ice ship going “Double Acting Tanker” is introduced. The procedure orderly consist of hull form design, analyses of performance of a ship in open water and ice condition, maneuverability performance, ice loading effect on propeller and torsional shaft, and economical and environmental societies. In the present study, only two topics are mainly discussed, which are hull form design and then continued with performance analysis in ice condition and open water. For the hull form design the objective parameter are considered as follows; stem and the stern angles, upper and lower fore bulbous angles, entrance angles, and spreading angles. All those angles are investigated for both full loaded and ballast condition in ahead and astern. Special concern is needed for stern part due to existing propeller effect on ice breaking performance. The hull form is firstly investigated without installation of propeller to avoid the effect of pressure from propeller and then continued by installation of propeller to find the optimum propeller design and propeller immersion. Research in ice condition is compromised with open water. The optimum hull form, propeller design and propeller immersion is when the hull form gives better performance for both open water and ice condition. The selected hull form then is compared with existing DAT tanker “Tempera”.

Analysis of Shock Resistance on GWC6066 Marine Gearbox

2014 ◽  
Vol 602-605 ◽  
pp. 135-138
Author(s):  
Wen Liu ◽  
Teng Jiao Lin ◽  
Ze Yin He
Keyword(s):  
Dynamic Stress ◽  
Strength Criterion ◽  
Element Model ◽  
Vibration Velocity ◽  
Vibration Acceleration ◽  
Dynamic Finite Element ◽  
Spring Element ◽  
Equivalent Time ◽  
Shock Resistance ◽  
Resistance Performance

The dynamic finite element model of entire gearbox, including gears, shafts, bearings and gearbox housing was established by using the truss element, spring element and tetrahedral element at first. Then the shock spectrum of GWC6066 gearbox was gotten according to German specification BV043/85. After the shock spectrum converted into equivalent time-domain acceleration curve, the vibration velocity, vibration acceleration and dynamic stress of GWC6066 gearbox under the double half-sine acceleration shock excitation were simulated. At last, the shock resistance performance of gearbox was analyzed combining with the strength criterion.

SiC/Si - MoSi2 /MoSi2 Oxidation Protective Coating for Carbon Material at 1700°C

2010 ◽  
Vol 160-162 ◽  
pp. 1-6 ◽  
Author(s):  
Ju An Zhao
Keyword(s):  
Oxidation Resistance ◽  
Thermal Shock Resistance ◽  
Graphite Substrate ◽  
Good Oxidation Resistance ◽  
Functionally Gradient ◽  
Mosi2 Coating ◽  
Shock Resistance ◽  
Resistance Performance ◽  
Sintering Method ◽  
Layer Coating

A multi-layer coating SiC/ Si - MoSi2 /MoSi2 with good oxidation resistance has been developed by using the slurry-sintering method on the surface of graphite to improve the oxidation resistance performance at 1700 °C for more than 200 h. Microstructure and anti-oxidation property of the as-received coating were investigated. It was found that functionally gradient SiC/ Si - MoSi2 /MoSi2 coating was formed on the surface of the graphite substrate. The coating characterized by excellent thermal shock resistance can effectively protect the graphite from oxidation at 1700 °C for 200 h. The mechanism of the oxidation resistance of the coated graphite is also dicussed, and a dense SiO2 layer was formed on the surface of coating at 1700°C during the isotheral oxidation, which can protect graphite from oxidation at longer time.

A Review of Smart Material and Vibration Control for Civil Engineering Structure

2012 ◽  
Vol 204-208 ◽  
pp. 4097-4100 ◽  
Author(s):  
Li Ping Qin ◽  
Yuan Jun Yan
Keyword(s):  
Vibration Control ◽  
Structural Control ◽  
Passive Control ◽  
Control Mechanism ◽  
Smart Material ◽  
Structural Vibration ◽  
Active Structural Control ◽  
Shock Resistance ◽  
Resistance Performance ◽  
Research Frontiers

Intelligent control for structural vibration is the international research frontiers in vibration control. The intelligent material and intelligent adjustable dampers and smart material actuator has the advantages of simple structure, easy adjustment, small energy consumption, driving the rapid response, almost without delay, in active structural control, semi-active control and passive control, has broad application prospects. The actuator is setted on the structure as a control mechanism, the control mechanism and the structure resist the vibration dynamic loads together, reduce the dynamic response of structure, improve the shock resistance performance of the structure.

Performance Analysis of Polyacrylonitrile Fiber Concrete on Airport Pavement

2011 ◽  
Vol 374-377 ◽  
pp. 1467-1472
Author(s):  
Hai Xin Ma ◽  
Ran An
Keyword(s):  
Performance Analysis ◽  
Carrying Capacity ◽  
Impact Resistance ◽  
Plain Concrete ◽  
Polyacrylonitrile Fiber ◽  
Load Carrying Capacity ◽  
Airport Pavement ◽  
Load Carrying ◽  
Fiber Concrete ◽  
Resistance Performance

Properties of plain concrete and polyacrylonitrile fiber concrete, including fatigue resistance performance，flexural toughness and impact resistance performance were respectively studied．Improved effect on airport pavement classification number(PCN)by the addition of polyacrylonitrile fiber in concrete was then analyzed．Experiment results showed that all property indexes of concrete increased greatly，and pavement classification number also was enhanced by the percentage of 8.4．In this way，load-carrying capacity of airport pavement was enhanced greatly．

Ablation Performance and Surface Texture of the Nitride Composites Reinforced by the Braided Silica Fibers

2008 ◽  
Vol 368-372 ◽  
pp. 980-982 ◽  
Author(s):  
Yong Gang Jiang ◽  
Chang Rui Zhang ◽  
Feng Cao ◽  
Si Qing Wang ◽  
Bin Li
Keyword(s):  
Surface Texture ◽  
Three Dimensional ◽  
Liquid Oxygen ◽  
Material Density ◽  
Heating Source ◽  
Silica Fibers ◽  
Ablation Resistance ◽  
Temperature Application ◽  
Shock Resistance ◽  
Resistance Performance

Braided silica fibers reinforced nitride composite (SFRN), which was prepared by the polymeric precursor infiltration and pyrolysis (PIP) process with the precursor polyborosilazane (PSBZ), was a new typed microwave transparent material with high mechanical and ablation resistance performance for high-temperature application. The thermal ablation performance of the SFRN was evaluated by the ablation equipment with the kerosene and liquid oxygen as the heating source. The ablation surface texture of the SFRN including macrostructure and roughness were measured by Three-dimensional Macrostructure and Contour Scale System (TMCSS). Results showed that there are no concurrent observation of thermal delaminations or cracks and the specimen remains intact. The SFRN has an excellent thermal shock resistance and good ablation resistance with the linear recession rate of 0.038mm/s. The ablation surface texture of the SFRN can be well illuminated by the TMCSS. And the ablation performance will be improved by enhancing material density and homogeneous intertextures.

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