舱室轻量化壁板结构仿真分析方法研究

发布时间：2018-01-19 00:01

本文关键词： 蜂窝夹层板等效仿真 ANSYS 轻舱壁　出处：《中国海洋大学》2014年硕士论文　论文类型：学位论文

【摘要】：面对当今人类社会对节能减排的提倡，以及国际海事组织提出的“新船能效设计指数”要求所带来的压力，全世界造船业都在努力实现船舶的低燃油消耗、低污染、高运输效率。在保证船舶强度的前提下，通过减少船舶自重、实现船舶轻量化来提高船舶运输效率已经成为国际航运界的共识。轻舱壁是一种广泛应用在船舶与海洋工程上层建筑中的舱壁结构形式，一般只起简单的间隔作用，具有一定的刚性。而蜂窝夹层板作为一种轻型复合材料，具有弯曲刚度大、强度高、稳定性好、隔声隔热效果好等特点。本文探讨用蜂窝夹层板替代船舶与海洋工程上层建筑中的传统轻舱壁结构，以此来达到一定的减重目的。目前蜂窝夹层板主要是在一些船舶特殊结构和特殊船型的建造中得到使用，还未在造船领域得到广泛应用的一部分原因是对蜂窝夹层板在实际工程中的应用研究仍然不够充分，需要确定出合理可靠的静力分析方法应用于工程实际。而蜂窝夹层板结构由于其芯层细观结构较多，工程实际中无法完全按照三维实体模型进行有限元分析。因此，有必要对蜂窝夹层板的等效仿真方法进行探讨。本文采用理论分析、物理模型试验和有限元仿真相结合的方法，对蜂窝夹层板的等效仿真方法进行了研究，对比分析了基于三种等效理论的等效仿真方法，并初步分析了蜂窝夹层板替代船舶与海洋工程上层建筑中传统轻舱壁的减重效果，主要工作如下：首先对比分析了多位学者推导的蜂窝芯层等效力学参数公式，并联系实际应用进行了总结。然后介绍了目前常用的三种蜂窝夹层板等效理论，即等效板理论、蜂窝板理论、三明治夹芯板理论，为之后的等效仿真方法对比分析提供了理论支持。为了验证蜂窝夹层板有限元三维实体模型的仿真效果，本文对蜂窝夹层板试样进行了三点弯曲试验，试验模型与仿真模型相应测点的应力和挠度误差较小，认为蜂窝夹层板三维实体模型可以作为验证等效仿真方法准确性的标准。将三种蜂窝夹层板等效理论分别与ANSYS有限元软件中的壳单元结合使用，以三维实体模型仿真结果作为标准，对比分析三种等效仿真方法在蜂窝夹层板静力分析中的仿真效果，并全面验证了基于三明治夹芯板理论的等效仿真方法的可靠性。利用仿真方法将蜂窝夹层板与传统轻舱壁结构的力学性能进行初步的对比分析，通过调整蜂窝夹层板的芯层高度和面板厚度，使其能够在强度和刚度方面与传统轻舱壁结构达到等效，满足替代要求，并分析其减重效果。算例分析结果表明，，用蜂窝夹层板替代传统轻舱壁结构可以起到较好的减重效果。
[Abstract]:In the face of today's human society to promote energy saving and emission reduction, and put forward the International Maritime Organization "new ship energy efficiency design index requirements of the pressure brought to the world shipbuilding industry in efforts to achieve low fuel consumption and low pollution, ship, high transport efficiency. Under the premise of ensuring the strength of the ship, by reducing the ship weight, implementation lightweight ship to improve transport efficiency has become the consensus of the international shipping industry.
Light is a kind of widely used bulkhead bulkhead structure in the form of superstructure of ship and marine engineering, just a simple interval effect, has certain rigidity. The honeycomb sandwich plate as a kind of lightweight composite materials, flexural rigidity, high strength, good stability, the characteristics of sound insulation and heat insulation effect is good in this paper. To explore the traditional light bulkhead plate instead of ship and ocean engineering superstructure with honeycomb sandwich, in order to achieve the purpose of weight loss to some extent. At present the honeycomb sandwich plate is mainly in the construction of some special structure and special ship ship was to use, yet in shipbuilding field get a part of the reason is widely used in research and application of the honeycomb sandwich plate in practical engineering is still insufficient, need to determine a reasonable and reliable static analysis method is applied to the engineering practice. The honeycomb sandwich structure because of its core layer meso There are many structures. In engineering practice, finite element analysis can not be carried out according to the three-dimensional solid model. Therefore, it is necessary to discuss the equivalent simulation method of honeycomb sandwich panels.
This paper based on theoretical analysis, physical model test method and finite element simulation with the equivalent simulation method of honeycomb sandwich panel were studied. The comparative analysis of the three kinds of equivalent simulation method based on equivalent theory, and analyzes the effect of weight loss of honeycomb sandwich plates to replace traditional light bulkhead ship and ocean engineering in superstructure the main work is as follows:
Based on the comparison of formula of equivalent mechanical parameters of honeycomb core layer is a number of scholars, and practical applications are summarized. Then this paper introduces three kinds of commonly used honeycomb sandwich equivalent theory, namely the equivalent plate theory, honeycomb plate theory, sandwich plate theory, provides a theoretical support for comparative analysis of equivalent simulation method for the following.
In order to verify the simulation effect of the honeycomb sandwich plate three-dimensional finite element model, the honeycomb sandwich specimens were three point bending test, model and simulation model of the corresponding measuring point stress and deflection error is small, that the honeycomb sandwich plate 3D model can be used to verify the accuracy of equivalent simulation method.
Three kinds of honeycomb sandwich plates were used in combination with the theory of the equivalent shell element of finite element software ANSYS, the simulation result of 3D entity model as a standard, comparative analysis of simulation results of three equivalent simulation method in the analysis of the honeycomb sandwich plate in static, and fully verify the reliability of the equivalent simulation method based on the theory of sandwich plate.
The simulation of mechanical properties of honeycomb sandwich plate and the traditional light bulkhead structure analyzed by adjusting the contrast of the honeycomb sandwich plate core height and the thickness of the panel, which can achieve the equivalent in strength and stiffness with the traditional light bulkhead structure, meet the alternative requirements, and to analyze the effect of weight loss example. The analysis results show that the honeycomb sandwich plates used to replace the traditional light bulkhead structure can play a better effect of weight loss.

【学位授予单位】：中国海洋大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U663.4

【参考文献】