基于ANSYS的坞式船闸闸室结构应力有限元分析

发布时间：2018-05-27 14:14

本文选题：土基船闸 + 闸室结构　；参考：《大连海洋大学》2015年硕士论文

【摘要】：闸室是船闸工程中重要的组成部分,因此闸室结构应力计算的准确性对最后船闸设计的准确性、合理性以及经济性起着举足轻重的作用。本文通过对比传统解析法和有限元软件ANSYS对某土基坞式船闸闸室结构应力的计算结果,针对传统解析法在计算中的局限性,验证有限元软件ANSYS在船闸闸室结构应力计算中的准确性。同时利用有限元软件ANSYS真实模拟船闸闸室结构,找到影响船闸闸室结构应力的关键因素,从而为船闸闸室设计的经济和效率等方面提供参考。本文主要研究工作和结果是:利用传统解析法,计算在各种荷载组合作用下,土基上的坞式船闸闸室的结构应力情况;采用ANSYS大型三维有限元软件建立船闸闸室模型,模拟船闸结构与周围土体相互作用,调整设计参数,对土基上的船闸闸室结构进行计算并分析;对荷载的加载过程笔者编了一套程序,可以较为简单的完成加载任务,并且也可以推行到其他船闸闸室加载过程中去。对有限元法得到的结果以及解析法得到的结果进行对比,验证了有限元软件ANSYS模型建立和计算结构的准确性,并得出解析法在结构计算上的局限性,有限元法在边界条件和实际参数的设定上要比解析法更真实。不过在一些局部或者关键部位,有限元计算结果比较大,这是由于在模型中的某些节点产生应力集中现象;有限元软件ANSYS和传统解析法在最后都得出了相同的结果:该土基上的坞式船闸闸室结构抗滑、抗倾、抗浮稳定性符合设计条件,但是地基承载力在各个工况下均不能符合条件,需要进行地基处理;通过改变土体内摩擦角φ、闸墙背与垂直线的夹角α,闸室自重和填土土压力变化,船闸闸室结构的应力分布变得很均匀,并结合非线性有限元的计算分析结果,结果表明:在土基上的坞式船闸闸室结构,闸室自重和填土的土压力是影响闸室结构应力的重要影响因素。
[Abstract]:Lock chamber is an important part of shiplock engineering, so the accuracy of stress calculation of lock structure plays an important role in the accuracy, rationality and economy of final lock design. In this paper, the traditional analytical method and the finite element software ANSYS are compared to calculate the structural stress of a certain earthen dock lock chamber, aiming at the limitation of the traditional analytical method in the calculation. The accuracy of finite element software ANSYS in the stress calculation of lock chamber is verified. At the same time, the finite element software ANSYS is used to simulate the lock chamber structure, and the key factors affecting the structural stress of the lock chamber are found, which provides a reference for the economic and efficiency aspects of the lock chamber design. The main research work and results of this paper are as follows: using the traditional analytical method to calculate the structural stress of dock lock chamber on soil foundation under the action of various load combinations, the model of lock chamber is established by using ANSYS large-scale three-dimensional finite element software. Simulating the interaction between shiplock structure and surrounding soil, adjusting design parameters, calculating and analyzing the structure of lock chamber on soil foundation, making a program for loading process, which can accomplish the loading task easily. It can also be applied to the loading process of other lock chambers. By comparing the results obtained by finite element method with those obtained by analytical method, the accuracy of the finite element software ANSYS model establishment and structure calculation is verified, and the limitation of the analytical method in structure calculation is obtained. The finite element method is more realistic than the analytical method in setting the boundary conditions and actual parameters. However, in some local or key parts, the finite element results are relatively large, which is due to the stress concentration phenomenon in some nodes in the model. The finite element software ANSYS and the traditional analytical method have obtained the same result in the end: the structure of dock lock chamber on the soil foundation meets the design conditions, but the bearing capacity of the foundation can not meet the conditions under each working condition, and the stability of anti-slide, anti-dip and anti-floatation of the dock lock chamber structure on the soil foundation is in accordance with the design conditions. By changing the internal friction angle 蠁, the angle 伪 between the back of the lock wall and the vertical line, the weight of the lock chamber and the earth pressure, the stress distribution of the lock chamber structure becomes very uniform. Combined with the results of nonlinear finite element analysis, the results show that the weight of lock chamber and the earth pressure of fill are the important factors that affect the stress of the lock chamber structure on the earth foundation.
【学位授予单位】：大连海洋大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U641.31

【参考文献】