Abstract: Ship safeties were an important problem since the ship invention. Every shipwreck cause huge hazard, which make lots of casualties, properties loss, huge economic loss, and psychic trauma of dead relatives. Consider these, many ship safety work and design have been done and try to avoid the maritime loss. This letter introduces a design that mainly included carry cargo buoyancy tank with clapboard system. This anti-sink ship design with buoyancy tanks and clap board to protect ship safety quick and efficient. The cargo can be transport in the buoyancy tanks, without wasting space. The clap board have doors can be sealed as the second bottom when ship in danger. The system can be unfold in short time to enlarge draft areas, and then make ship anti-sink. When ship in danger, to unfold buoyancy tanks and sealed clap board, which can enlarge draft area and to anti-sink in short time. This anti-sink ship design thinking that try to make the shipping more safety than before.Abstract: Ship safeties were an important problem since the ship invention. Every shipwreck cause huge hazard, which make lots of casualties, properties loss, huge economic loss, and psychic trauma of dead relatives. Consider these, many ship safety work and design have been done and try to avoid the maritime loss. This letter introduces a design that mainly...Show More
Abstract: A continuous interest for an extensive use of sandwich structures in automotive, aerospace and civil infrastructure has been manifested in the last years due to the main advantage of lightweight and energy absorption ability. Based on characteristics of press molding process of honeycomb sandwich structure, a new kind of quasi-square honeycomb sandwich structure is proposed. Following classical unit cell theory and energy method, the mechanical equivalent model of the quasi-honeycomb sandwich structure is established and the corresponding equivalent elastic constant formula is deduced. Taking a sandwich panel in a satellite structure as an example, from the aspect of core characteristics, mechanical properties, equivalent elastic constants of honeycomb sandwich structure, and shear modulus, the differences between square honeycomb and quasi-square-honeycomb were analyzed and studied. The results show that both equivalent elastic modules are approximately equal, but the quasi-square-honeycomb sandwich structure is endowed with higher equivalent shear modulus and lower equivalent body density, thus the total structure mass can be effectively reduced. Simulation verifies the correctness of the proposed mechanical equivalent model of the quasi-square-honeycomb sandwich structure.Abstract: A continuous interest for an extensive use of sandwich structures in automotive, aerospace and civil infrastructure has been manifested in the last years due to the main advantage of lightweight and energy absorption ability. Based on characteristics of press molding process of honeycomb sandwich structure, a new kind of quasi-square honeycomb sand...Show More
