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首页> 外文期刊>International journal of steel structures >Numerical Study on Optimal Geometric Parameters for Multi-performance of Friction High-Strength Bolts
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Numerical Study on Optimal Geometric Parameters for Multi-performance of Friction High-Strength Bolts

机译：Numerical Study on Optimal Geometric Parameters for Multi-performance of Friction High-Strength Bolts

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摘要

Geometric parameters present varying degrees of coupling effects on different performance indexes including slip resistance, preload force, and steel plate stress of friction high-strength bolts, resulting in mutual restraint relationships among these indexes. Design parameters and performance assessing indicators, in the current code, are relatively simple mentioned, which have few relevant investigations on the influences of different parameters to the mechanical performance of high-strength bolts by a more comprehensive evaluating method. This paper has systematically studied the influences of geometric parameters on the overall performance of friction-type high-strength bolts through four performance evaluation indexes based on finite element method and multi-objective optimization technology. The obtained results showed that the preload force loss of bolt slip was maintained within 5 and part dimension had a major impact on the stress distribution performance of bolt connection. The performance indexes of slip resistance, preload force, steel plate stress, and friction stress were mainly affected by cover plate thickness, middle plate thickness, hole diameter, and nut diameter. From the optimization results, the recommended value range of cover plate to medium plate thickness ratio verified the correctness of existing specifications, and aperture and nut diameter had a narrow value range for the stable performance of high-strength bolts keeping.

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