Journal
APPLIED SCIENCES-BASEL
Volume 12, Issue 19, Pages -Publisher
MDPI
DOI: 10.3390/app12199623
Keywords
dynamic-load identification; function principle; time domain method; inverse problem; experiment
Categories
Funding
- Foundation of the National Key Laboratory of Science and Technology on Rotorcraft Aeromechanics [61422202105]
- Qing Lan Project
- National Natural Science Foundation of China [52171261]
- Jinling Institute of Technology [jit-fhxm-201914]
Ask authors/readers for more resources
In this paper, a novel method based on function principles in the time domain is proposed to identify dynamic loads. By establishing a linear relationship between external load and structural response and solving the inverse problem in each micro-segment, this method effectively solves the problem of cumulative errors in the time-domain method and demonstrates strong resistance to noise interference.
In order to ensure the reliability of the structural design, it is necessary to know the external loads acting on the structure. In this paper, we propose a novel method to identify the dynamic loads based on function principles in the time domain. Assuming the external load remains constant within one micro segment, we establish a linear relationship between external load and structural response in the micro segments based on the mechanical energy conservation law. Next, the external load is obtained by solving the inverse problem in each micro-segment. Finally, the external load in the whole time domain is achieved by fitting the load-identification results in each micro segment. In order to verify the effectiveness and accuracy, single-force and two-force identification, and load identification with noise simulations, are performed on the structures, and the identification results are compared to the ones of the traditional time-domain method with a deviation of less than 5%. The proposed method can effectively solve the problem of cumulative errors in the time-domain method, while its resistance to noise interference is also strong. At last, we verify the experimental performance of the proposed method. The experimental results show the effectiveness and high accuracy of the proposed method. This work presents a first attempt to solve the structural dynamic load with an approach based on a function principle.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available