Regular pyramid unit composite array structure optimization method for collision energy absorption
A composite array and collision energy absorption technology, which is applied in the field of collision energy absorption, can solve problems such as deterioration of mechanical properties, and achieve the effects of reducing damage, good damping effect, and reducing damage
Inactive Publication Date: 2020-05-29
ZHEJIANG UNIV
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[0042] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various modifications and changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention.
[0043] The specific steps of the embodiments of the present invention are as follows:
[0044] Step 1, the composite array structure includes a sandwich structure 2 and an upper panel 1, and the upper panel is located on the top surface of the sandwich structure 2, such as figure 1 shown.
[0045] According to the size of the vibration protection object to be realized and the actual installation requirements, it is determined that the mater...
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The invention discloses a regular pyramid unit composite array structure optimization method for collision energy absorption. The sandwich structure is formed by tightly arranging and connecting sandwich body cell units in an array manner. The method includes constructing a similarity ratio, and establishing a sandwich structure shape and size formula, wherein the number of sides is the number ofsides of the bottom surface of the sandwich body cell unit, the sandwich body cell units are regular pyramids, and the interiors of the sandwich body cell units are hollow; according to the preset number of edges, thickness and bearing forward load, taking the minimum maximum stress of the composite array structure after being deformed by the forward load F as an objective function, taking the similarity ratio as an individual, solving the optimal similarity ratio by adopting a genetic algorithm, and then determining the optimal sandwich structure according to the optimal similarity ratio. Thesandwich structure with high specific rigidity and strong anti-collision performance can be realized, the absorption of collision energy is realized, the method can be applied to the long-distance transportation process of large instruments, and the bumping safety protection is realized.
Description
technical field [0001] The invention relates to a structure optimization method in the field of collision energy absorption, in particular to a structure optimization method of a composite array of regular pyramid units for collision energy absorption. Background technique [0002] The rapid development of the Internet of Things and global trade has made the transfer of objects more frequent. It is particularly important to ensure the safe long-distance transmission between objects. [0003] Sandwich structures, usually consisting of two thin faces with a core in between, are widely used in energy-absorbing applications. Sandwich structures such as traditional cellular foams have been documented in a large number of documents. However, honeycomb sandwich structures suffer from the problem of unwanted moisture accumulation, leading to deterioration of mechanical properties. In recent years, many forms of nuclear structures have emerged, such as truss core panels and folded...
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Login to View More IPC IPC(8): G06F30/17G06F30/23G06F30/27G06N3/12G06F111/06G06F113/20
CPCG06N3/126
Inventor 高一聪李康杰冯毅雄
Owner ZHEJIANG UNIV