A Synthesis Method for Elastic Connector Structure Based on Impulse Response Function
A technology of impulse response function and elastic connection, which is applied in electrical digital data processing, special data processing applications, instruments, etc., can solve the problems that cannot truly reflect the elastic characteristics of substructure connectors, dynamic response analysis distortion, etc.
Active Publication Date: 2016-09-07
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology
[0005] The purpose of the present invention is to solve the problem that the traditional IBS method cannot truly reflect the elastic characteristics of the substructure connectors, which leads to the distortion of the dynamic response analysis of the entire system, and proposes a description method for elastic connections in the time domain substructure synthesis process. This method extends the scope of application of the IBS method
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[0079] In order to better illustrate the purpose and function of the present invention, the present invention will be explained in detail below through the dynamic analysis of an 11-degree-of-freedom spring-damper-mass system. The analysis step is 1ms, and the analysis time is 1s.
[0080] The system in this example is divided into two substructures, substructure 1 contains 7 degrees of freedom, substructure 2 contains 4 degrees of freedom, and the m of substructure 1 5 、m 6 and m 7 m through elastic connectors and substructure 2 8 connected, such as image 3 shown. The dynamic parameters of the substructure and connectors are shown in Table 1. Assume that the external force is only applied up to m 9 above, it is stipulated that the right direction is the positive direction, and the time curve of the external load is as follows Figure 4 shown.
[0081] Table 1 Dynamic parameters of substructure and connectors
[0082]
[0083] The flow process of the algorithm of ...
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The invention relates to a synthesis method for elastically connecting substructures based on impulse response functions, and belongs to the technical field of structural dynamics. The method comprises the steps that first, an impulse response function array of the substructures is obtained; second, consistency conditions, including interface displacement consistency conditions and interface force consistency conditions, of substructure interfaces are built according to the connection relations between the substructures, and motion equations of connecting pieces is built; third, motion equations of the substructures are built through the interface force consistency conditions and the impulse response function array; fourth, the motion equations of all the substructures are synthesized through the displacement consistency conditions and the motion equations of the connecting pieces to figure out responses of the substructures. Compared with a classic time domain substructure method, on the basis of the impulse response functions, a method for describing the elastic connecting pieces between the substructures is given, the defect that the classic time domain substructure method is only suitable for analyzing rigid connection between substructures is overcome, and the application range of the time domain substructure method is broadened.
Description
technical field [0001] The invention relates to an elastic linker structure synthesis method and algorithm, in particular to an elastic linker structure synthesis and algorithm based on an impulse response function, and belongs to the technical field of structural dynamics. Background technique [0002] With the development of aerospace technology and the improvement of the requirements for the dynamic design of engineering structures, the structure system of spacecraft has become increasingly complex and large. In the process of dynamic analysis and optimal design, due to the many degrees of freedom of the model, a lot of time has to be spent on calculation. On the other hand, the development of many spacecraft often requires cooperation between different regions or even different countries. Considering the issue of technical protection, the two parties cannot directly share the finite element model. The dynamic substructure method is an ideal method developed to solve the...
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IPC IPC(8): G06F17/50
Inventor 刘莉董威利周思达
Owner BEIJING INSTITUTE OF TECHNOLOGYGY