Vibration measurement test device of inner bracket type spring suspension wire segment model

Abstract

Provided is an inner-support spring suspended wire segment model vibration measurement test apparatus which comprises a segment model and supporting columns fixedly installed on both sides in a wind tunnel test section. Top beams and bottoms are installed between the supporting columns at the same side and are capable of moving up and down along the supporting columns to be adjusted in positions. Two vertical position-adjustable upright springs are installed between the top beam and the corresponding bottom beam. A horizontally-arranged suspension cross bar is installed on the upright spring. Each of both ends of the segment model is connected with an end plate. Each end plates is connected with the adjacent suspension cross bar through a connecting piece. Both sides of each connecting piece are connected with two supporting columns at the same side through horizontal springs. The segment model is connected with the suspension cross bars through the end plates and the connecting pieces so as to be capable of freely and translationally moving in the vertical direction and freely rotating about a inertia axis of the segment model. In addition, the connecting pieces are connected with the supporting columns through the horizontal springs such that the segment model may freely and translationally move in the horizontal direction.

Description

technical field [0001] The invention relates to a test device in the field of design and research of wind resistance design of high-voltage transmission lines, in particular to an inner support type spring-suspended wire segment model vibration test device. Background technique [0002] The galloping of the ice-coated conductor is a kind of large-scale low-frequency vibration that occurs under the action of wind load after the conductor is covered with ice. When galloping occurs, it will cause the wear and tear of the components and the fracture of the main material, and the severe one will lead to the continuous collapse of the entire transmission line tower, resulting in huge economic losses. The Den-Hartog vertical excitation galloping mechanism believes that when the negative slope amplitude of the aerodynamic lift of the ice-covered section is greater than the aerodynamic drag, the vertical movement of the conductor is unstable and causes galloping; Values ​​exceeding ...

AI Technical Summary

Problems solved by technology

Regrettably, as far as the current situation is concerned, there is no one in the relevant domestic research institutions that does not require damage to the original structure of the wind tunnel. Test device

Images