On the precision of assembly of complicated structures

21st International Scientific Conference on Advanced in Civil Engineering "Construction - The Formation of Living Environment"

土木建筑工程

Petelina, Vera^1

Moscow State University of Civil Engineering, Yaroslavskoe shosse 26, Moscow

129337, Russia^1

关键词: Assembly process;    Building structure;    Complicated structures;    Probabilistic characteristics;    Steady state;    Total errors;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/365/4/042013/pdf
DOI  :  10.1088/1757-899X/365/4/042013

学科分类：土木及结构工程学

来源: IOP

【 摘 要 】

The problems of forecasting the precision of assembly of complicated structures assembled from rods according to a given program (farms, platforms) have been considered. Because of assembly operational margins and random scatter of the lengths of the rods, the errors occur in position of the structure and its nodes. It is necessary to find out the probabilistic characteristics of errors and to assess the precision of assembly. For each model structure, two assembly ways have been studied: a hard assembly and spring assembly. Under hard assembly, the assembled parts while the subsequent assembly are not deformed, and master links allow adjustment of their length. The formulas for calculating the deviation of the steady-state length of (malformed) member, of which the structure is fitted, from the statistically distributed length of the non-deformed rod are given. Multiple implementations of the assembly process of various structures on a computer have been obtained and from these data the probability characteristics of the total error have been derived. The proposed method can be used in the construction industry when assembling complicated structures and allows to obtain sufficiently precise data, eliminating errors in the position of the building structure.