An Optimal Design Method for the Structure of a Rod Balance Vertical Beam Axial Force Element
A technology of axial force and vertical beam, which is applied in the field of aerospace testing, can solve the problems of large axial output interference of the balance, and achieve the effects of improving measurement accuracy, simple and effective optimization design method, and reducing interference
Active Publication Date: 2021-02-19
中国空气动力研究与发展中心超高速空气动力研究所
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[0005] The purpose of the present invention is to provide an optimal design method for the structure of the vertical beam axial force element of a rod balance, to solve the problem that the normal load interferes with the balance axial output, and to improve the measurement accuracy of the balance axial force element , to meet the force measurement accuracy requirements of wind tunnel tests for aircraft with a large lift-to-drag ratio
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[0035] The present invention will be further described in detail below in conjunction with the accompanying drawings, so that those skilled in the art can implement it with reference to the description.
[0036] It should be understood that terms such as "having", "comprising" and "including" as used herein do not entail the presence or addition of one or more other elements or combinations thereof.
[0037] The invention discloses an optimal design method for a rod-type balance vertical beam-type axial force element structure, which includes the following steps:
[0038] Step 1. According to the wind tunnel test status and model aerodynamic parameters, the diameter of the balance is determined to be 20mm, and the loads of the components of the balance design are given in Table 1; The general structure of the force element, such as image 3 , and determine the number, height, width and thickness of the measuring beam and the supporting beam, as well as the distance between th...
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The invention discloses an optimum design method for a rod type balance vertical beam type axial force element structure. The optimum design method for the rod type balance vertical beam type axial force element structure comprises the following step: (1) giving a structure of a vertical beam axial force element according to given load of various components of a balance, and determining the number, height, width and thickness of a measuring beam and a distance between the measuring beam and a supporting beam, wherein an included angle alpha between the measuring beam and an axial force elementbody is 90 degrees; (2) selecting a balance material, carrying out finite element simulation on the axial force element structure, and applying six-component load to obtain a strain distribution condition of the measuring beam; (3) adjusting the included angle alpha, and carrying out stress simulation on the adjusted balance structure to obtain a strain distribution condition of the adjusted measuring beam; (4) establishing a relation curve between strain output UYX and the included angle of the axial force element of different included angle alpha under a normal load, and carrying out linearfitting to obtain a functional relationship between the included angle alpha and UYX so as to obtain an optimal included angle alpha; and (5) designing the axial force element by using the optimal included angle alpha, and carrying out simulation to obtain influence of the normal load to axial output.
Description
technical field [0001] The invention belongs to the technical field of aerospace testing, and in particular relates to an optimal design method for a wind tunnel rod type balance vertical beam type axial force element structure. Background technique [0002] Rod strain balance is an important device in wind tunnel aerodynamic tests, in which the balance axial force element is the most complicated structure of the balance, and the axial force is also one of the most difficult load components to measure. In the aerodynamic test, it is necessary to consider the axial load of the model on the balance when the model has a large angle of attack, and to meet the requirements of the measuring range of the axial force, which causes the contradiction between the balance stiffness and the balance sensitivity. The balance design should comprehensively consider the stiffness and sensitivity requirements under the test state, and design an axial force element with appropriate stiffness an...
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IPC IPC(8): G06F30/23
CPCG06F30/23
Inventor 闵夫皮兴才邱华诚杨彦广戴金雯李绪国
Owner 中国空气动力研究与发展中心超高速空气动力研究所