A method and device for obtaining the prestressing force of a tower crane boom
A boom and prestressing technology, applied in cranes, instruments, design optimization/simulation, etc., can solve the problems of increasing the bending moment of the boom, reducing the lifting capacity of the boom, and increasing the self-weight of the boom , to achieve the effect of improving lifting capacity, improving force characteristics, and simple implementation
Active Publication Date: 2021-03-05
SHANDONG JIANZHU UNIV +1
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[0002] Tower crane is an important equipment for vertical and horizontal transportation of materials in the construction field. As the main part of the whole machine structure, the boom is also subject to compression and bending. In order to improve the lifting capacity of the boom and improve the lifting capacity The force characteristics of the jib, the traditional way is basically by changing the structure type of the tower crane, increasing the cross-sectional area of the jib, etc., but these methods will increase the self-weight of the jib, and then increase the downward force of the jib. bending moment, thereby reducing the lifting capacity of the jib
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[0020] The present invention will be further described below in conjunction with examples, and the following examples are only used to illustrate the technical solutions of the present invention, but do not limit the present invention.
[0021] attached figure 1 It is a specific embodiment of the present invention to obtain prestressing of the boom, including a support arm (1), a boom (2), a jib pull rod (3), and a tower body (4). For the convenience of explanation, figure 2 for figure 1 Schematic diagram of the simplified mechanical model of , the jib and support arm are fixed at point A, one end of the jib tie rod is hinged at point B of the support arm, and the other end is hinged at point C of the jib, forming a statically indeterminate structural system. Among them, the distance between the lifting point position C of the jib jib pull rod and the fixed point A is , the total length of the boom is , the total length of the support arm is , when the boom is not p...
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The invention introduces a method for obtaining the prestressed force of the boom of a tower crane. In a tower crane with a statically indeterminate structure, on the premise of not changing the position of the hinge point of the jib pull rod and the boom, by changing the connection point The length of the jib tie rod between the boom and the support arm enables the boom to obtain prestress, that is, without changing the structure of the tower crane, only by changing the length of the jib tie rod, the boom structure can be made Obtain a certain prestress in advance, so as to improve the stress characteristics of the boom and increase the bearing capacity of the boom.
Description
technical field [0001] The invention relates to the technical field of tower cranes, in particular to an effective method for obtaining prestress in the boom of a tower crane and a related application device. Background technique [0002] Tower crane is an important equipment for vertical and horizontal transportation of materials in the construction field. As the main part of the whole machine structure, the boom is also subject to compression and bending. In order to improve the lifting capacity of the boom and improve the lifting capacity The force characteristics of the jib, the traditional way is basically by changing the structure type of the tower crane, increasing the cross-sectional area of the jib, etc., but these methods will increase the self-weight of the jib, and then increase the downward force of the jib. Bending moment, thereby reducing the lifting capacity of the boom. Contents of the invention [0003] In order to solve the above problems, the present...
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IPC IPC(8): G06F30/20B66C23/62B66C23/16G06F119/14
Inventor 王囡囡王积永唐振北何继红
Owner SHANDONG JIANZHU UNIV