Generalized elastic coordinate method for unconstrained structural dynamic response analysis
An unconstrained, dynamic technology that can be used in constraint-based CAD, instrumentation, geometric CAD, etc., to solve problems such as finiteness and achieve results beneficial to response analysis
Pending Publication Date: 2022-07-12
DALIAN UNIV OF TECH
View PDF0 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The forced vibration analysis of these structures will inevitably be disturbed by the motion of rigid bodies, but the current analysis of dynamic response analysis of unconstrained structures, especially the analysis of elastic deformation is very limited, so it is necessary to specifically carry out dynamic response analysis for unconstrained structures
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0094] The specific embodiments of the present invention will be described in detail below with reference to the technical solutions and the accompanying drawings.
[0095] Reference Study: Dynamic Response Analysis of Unconstrained Slabs.
[0096] The invention relates to a generalized elastic coordinate method for dynamic response analysis of unconstrained structures. The method is validated by taking the transient response analysis of an unconstrained plate as an example. like figure 2 , the plate is an aluminum plate with a length of 1.2m and a width of 1.0m, and the thickness of the plate is 0.01m. Contains the following calculation steps:
[0097] 1. First, the aluminum plate is discreted by finite element, and a finite element model with 1575 degrees of freedom is obtained. This example uses Newmark-β for transient response analysis. The total displacement is obtained by directly solving the original equation of motion (marked as DMoverall in Figure 3). Then the ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention belongs to the field of unconstrained or under-constrained structural dynamics analysis of carrying equipment and the like, and relates to a generalized elastic coordinate method for unconstrained structural dynamics response analysis. According to the generalized elastic coordinate method, accurate mapping processing is performed on an unconstrained structure in a physical space; for a positive semi-definite dynamic system represented by an unconstrained structure, a motion equation of generalized elastic coordinates is established, and the equation is symmetrical and positive definite. The method is suitable for any non-positive definite structure dynamic system, such as an under-constraint problem. Accurate decoupling of rigid body motion and elastic deformation in the physical space is achieved, and the elastic displacement in the physical space can be obtained through generalized coordinate transformation after generalized elastic displacement is solved. An established positive definite system is beneficial to response analysis of structural dynamics, and a plurality of advanced reduced-order models can be applied to solving a motion equation of wide-body elastic coordinates.
Description
technical field [0001] The invention belongs to the field of unconstrained or underconstrained structural dynamics analysis of carrying equipment and the like, and relates to a generalized elastic coordinate method for dynamic response analysis of unconstrained structures. Background technique [0002] A large number of industrial equipment are in a floating state during real service. Such as aircraft in flight, launch vehicles in flight, underwater ship equipment, etc. These floating industrial equipment correspond to the unconstrained state in the structural mechanics analysis, that is, they are under completely free boundary conditions. The forced vibration analysis of these structures will inevitably be disturbed by rigid body motion, but the dynamic response analysis of unconstrained structures, especially the analysis of elastic deformation, is very limited at present, so it is necessary to carry out dynamic response analysis for unconstrained structures. . [0003]...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/23G06F30/17G06F119/14G06F111/04
CPCG06F30/23G06F30/17G06F2119/14G06F2111/04Y02T90/00
Inventor 张亚辉方琛
Owner DALIAN UNIV OF TECH