Analysis of the operating principle of the means of protection of mechanized support systems from dynamic loads

1990 ◽  
Vol 26 (3) ◽  
pp. 250-255 ◽  
Author(s):  
V. I. Klishin ◽  
V. A. Shcherbakov
Keyword(s):  
Support Systems ◽  
Operating Principle ◽  
Dynamic Loads ◽  
Mechanized Support

A method of estimating the operational reliability of kinematic mechanized support systems

1973 ◽  
Vol 9 (3) ◽  
pp. 333-335 ◽  
Author(s):  
V. I. Ivko ◽  
L. K. Ovchinnikova ◽  
V. I. Plotnikova
Keyword(s):  
Support Systems ◽  
Operational Reliability ◽  
Mechanized Support

scholarly journals Optimal Design of a Helical Coil Support for Dewars in Fuel Cell Applications

2021 ◽  
Author(s):  
Baby Nitin ◽  
Pavitra Sandilya ◽  
Goutam Chakraborty
Keyword(s):  
Fuel Cell ◽  
Optimal Design ◽  
Mechanical Strength ◽  
Support System ◽  
Energy Production ◽  
Support Systems ◽  
Optimization Technique ◽  
Dynamic Loads ◽  
Helical Coil ◽  
Helical Coils

Abstract Fuel cells are gaining popularity because of their efficient energy production without causing environmental pollution. Recently DRDO, has developed a fuel cell-based fuel cell-based Air Independent Propulsion (AIP) system. In this system, the hydrogen is produced onboard while oxygen is carried in liquified form (LOX) from the land in specially designed insulated storage vessels called dewars. Such vessels are needed because LOX has low boiling point (NBP ~ 90K) and heat of vaporization (~213 kJ/kg) due to which it boils off easily even when there is small amount of heat inleak from the ambient. A typical dewar consists of two vessels separated by insulation. Support members are used to hold the two vessels together. Heat inleak through the supports and the insulation of the dewar causes the boiling of LOX. The vessels are subjected to dynamic loads during the voyage as well as due to the filling and consumption of LOX. Therefore, the support system should be designed so that it can withstand the dynamic loads experienced by the dewar. While the support system should have enough mechanical strength to withstand the loads it is subjected to, it should also restrict the heat inleak from the ambient to minimize the LOX boil-off. To meet this requirement, we need to optimize the support system design. Design optimization of support systems is especially critical in submarines to reduce the snorkeling frequency. Even though the dewars are available commercially for various applications, their design methodologies are not available in the open literature. Cylindrical rods are generally used as support members. In earlier studies, the authors have shown that helical coils give better thermal performance than tension rods as dewar supports. These two support systems involve different design criteria. It is important to evolve an optimal design of the support system to maximize the mechanical strength of the support while minimizing the heat inleak through the support. In this paper we are presenting a design methodology for optimizing a helical support. We have proposed a modified optimization technique derived from the classical genetic algorithm (GA) for this purpose. The modification has been done by ensuring design feasibility of the coil at each step of the algorithm. The proposed optimization technique has been tested on a LOX dewar and an optimal design of the helical coil support has been obtained.

scholarly journals Mathematical model of the volumetric hydrodrive’s dynamics, sensitive to the loading variation

2018 ◽  
Vol 224 ◽  
pp. 02100 ◽  
Author(s):  
Alexandra Ivanovskaya ◽  
Vladimir Popov
Keyword(s):  
Mathematical Modeling ◽  
Mathematical Model ◽  
Characteristic Feature ◽  
Hydraulic Drive ◽  
Drive System ◽  
Operating Principle ◽  
Dynamic Loads ◽  
Dynamic Processes ◽  
Hydromechanical System

The paper deals with the problems of mathematical modeling of the dynamic processes proceeding in a complex hydromechanical system of the ship’s deck load-lifting devices. The characteristic feature of this class of equipment is the operation in special conditions, i.e, under the influence of external hydrometeorological factors, taking into account variations in the parameters of lifted or lowered cargo. With a view to gradual regulation of the change of torque on the working drum to reduce dynamic loads, it is offered to use a hydraulic drive that is sensitive to the variation of loading. The operating principle of the considered volumetric hydraulic drive is described. The received mathematical model allows to establish influence of the hydrodrive parameters on transients in a drive system.

Estimating the quality of interaction between mechanized support systems and lateral rocks

1987 ◽  
Vol 23 (1) ◽  
pp. 65-69 ◽  
Author(s):  
E. I. Rogov ◽  
B. A. Frolov ◽  
V. I. Klishin
Keyword(s):  
Support Systems ◽  
Mechanized Support

LGBT Families: Parenting Stressors and Support Systems

2010 ◽  
Author(s):  
Julie Konik ◽  
Beth Haines ◽  
Kim Vachon ◽  
Katy Fohrman ◽  
Erin Henzi
Keyword(s):  
Support Systems ◽  
Lgbt Families
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