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23-06-2023 дата публикации

Shield propulsion unit target thrust calculation method and system based on plane equation

Номер: CN116305836A
Автор: ZHU YETING, QIN YUAN, SUN JUN, DUAN SONG, ZHU YANFEI, ZHANG MINQING, MIN RUI, JIAO LEI, ZHANG BOYA, CAI DANDAN, TAN CHUNYI, LU JIE
Принадлежит:

The invention relates to a method and a system for calculating target thrust of a shield propulsion unit based on a plane equation. The method comprises the following steps: establishing a space rectangular coordinate system O-XYZ on a mounting surface of a shield propulsion system of a shield tunneling machine; determining the angle of the target total thrust point P in the plane XOY, and selecting a characteristic propulsion unit in a first quadrant or a second quadrant of the plane XOY; establishing a local coordinate system xOy, and setting a target thrust zi for each propulsion unit: zi = z0 + kli, (i = 1-n); the target thrust of the propulsion units is set in a thrust plane, the values of z0 and k are obtained based on the plane equation of the thrust plane, and then the target thrust of each propulsion unit is obtained according to the formula that zi = z0 + kli. The target thrust of each propulsion unit of the propulsion system is enabled to be in the same plane, so that the difference ...

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Номер записи: 1
27-06-2023 дата публикации

Optimization method for thrust overrun of shield tunneling system

Номер: CN116335687A
Автор: ZHU YETING, QIN YUAN, SUN JUN, DUAN SONG, ZHU YANFEI, ZHANG MINQING, JIAO LEI, YUAN XIANGHUA, WU WENFEI, ZHANG BOYA, CAI DANDAN, TAN LU, LU JIE
Принадлежит:

The invention relates to an optimization method for thrust overrun of a shield propulsion system. The optimization method comprises the following steps: finding out a plurality of propulsion oil cylinders with target thrust exceeding an effective range and defining the propulsion oil cylinders as overrun areas; the difference value between the target thrust of each thrust oil cylinder in the overrun area and the maximum value or the minimum value of the effective range is calculated, and a plurality of difference values are added to obtain a thrust increment; a first increment area is arranged at the positive half axis of the y axis, and the number of thrust oil cylinders in the first increment area is determined according to the thrust increment; the thrust value of each thrust oil cylinder is obtained through calculation; and judging whether the thrust value of each thrust oil cylinder is in an effective range or not. The problem that the target thrust of the thrust oil cylinders exceeds ...

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Номер записи: 2