一种含裂纹变厚度板结构振动响应半解析计算方法
By dividing the variable thickness plate structure into cracked and crack-free regions, and using a combination of finite element and analytical wave methods, a dynamic equilibrium equation was established, which solved the problem of low computational efficiency of traditional methods and enabled efficient analysis of the impact of crack defects on the vibration characteristics of the structure.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHINA AIRPLANT STRENGTH RES INST
- Filing Date
- 2026-05-07
- Publication Date
- 2026-07-17
AI Technical Summary
There is a lack of efficient calculation methods in the current technology to analyze the vibration characteristics of cracked variable thickness plate structures, especially inclined crack plate structures. The traditional finite element method has low calculation efficiency, while analytical methods cannot handle the inclined crack condition.
The cracked variable thickness plate structure is divided into cracked and crack-free regions. The finite element method is used to describe the vibration of the cracked region, and the analytical wave method is used to describe the crack-free region. The structure is discretized into multiple segments along the thickness variation direction. The structural dynamic equilibrium equation in wave space is established. Combining displacement continuity and internal force equilibrium conditions, the dynamic equilibrium equation is assembled, and the amplitude of each order of elastic wave is solved.
It significantly reduces the computational load and improves computational efficiency, enabling efficient study of the impact of crack defects on structural vibration characteristics and simplifying parametric analysis.
Smart Images
Figure CN122154349B_ABST