The Coupled Thermal-Structural Resonance Reliability Sensitivity Analysis of Gear-Rotor System with Random Parameters
Round 1
Reviewer 1 Report
This manuscript investigates resonance failure of gear-rotor system with the consideration of temperature rise, by the coupled thermal-structural reliability sensitivity analysis; by employing the PC-Kriging and adaptive design, the computing efficiency is elevated. In general, although this investigation is of interest, the following questions and comments should be addressed prior to recommending for publication.
1. Numerous format typos occurred in current manuscript, the authors are required to check the proposal before submission. For instance, the format error in line 94-95 of Page 3, the error in line 224 of Page 9, etc.
2. In the theoretical section, the equations which are not proposed by the authors should be referred, at least provides the relevant references.
3. More detailed backgrounds of proposing new method should be mentioned in agent model. Some related publications may help to enrich it, i.e., ” Active extremum Kriging-based multi-level linkage reliability analysis and its application in aeroengine mechanism systems, Aerospace Science and Technology, 2022, 131: 107968. (DOI: 10.1016/j.ast.2022.107968)”; Vectorial surrogate modeling approach for multi-failure correlated probabilistic evaluation of turbine rotor, Engineering with Computers, 2022. (DOI:10.1007/s00366-021-01594-2)”; AND “Recent advances in reliability analysis of aeroengine rotor system: a review, International Journal of Structural Integrity, 2022, 13(1): 1-29 (DOI: 10.1108/IJSI-10-2021-0111).
4. Method or result comparisons are recommended in Section 4, otherwise the effectiveness of the findings cannot be validated.
5. The conclusion is suggested to be polished, which is a very important part in the paper. The authors are suggested to focus the current findings.
Author Response
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Author Response File: 
Author Response.docx
Reviewer 2 Report
In this research, the gear-rotor system under high-speed and heavy-load conditions is studied. And the influence of temperature field on the natural frequency of gear rotor system is considered, The topic is very meaningful and the manuscript is worth reporting. However this manuscript has some problem need to be revision.
(1) There is a problem with typesetting, such as section 2.1.2, the sentence “As show in figure 1 transmission process of spur gear…”;
(2) In section 3.1, the equation gh(x) (h=1,2,…,p) has a spelling error, it should be (x=1,2,…,p).
(3) In section 3.1, the X in the sentence “supposed X is a random input variable subject to…” should be lowercase;
(4) There are some problem in this manuscript, such as the sentence “According to Eq.Eroor! reference source not found.,” in the last paragraph of the section 3.1, please check these problem carefully;
(5) The table 2 has Chinese expression;
Author Response
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Author Response File: Author Response.docx
Reviewer 3 Report
In this study, influence of temperature field on the natural frequency of gear-rotor system is investigated. The difference between the natural frequency and the excitation frequency of the gear-rotor system is taken as the performance function. The results show that the natural frequency of gear rotor decreases with the increase of temperature, and the natural frequency of different order varies with the change of temperature. Results of this manuscript are very useful for the interested reader of the current engineering journal. Applying the following comments and suggestions will improve the current version of the manuscript.
1. The Abstract should be rephrased since it is hard to highlight more important information. Abstracts usually have at least one sentence per each: context and background, motivation, hypothesis, methods, results, conclusions.
2. The authors should make clearer what the system is right away in the introduction. For readers that are not familiar with the area of this study, it is difficult to get a grasp of what the system is right away. Thus, it is recommended that the authors should add a schematic diagram of the system to add clarity.
3. According to the available technical literature concerning this paper, article innovation should be explained in comparison with other research works.
4. Model validation should be added to ensure the reliability of the model.
5. In section 4, it is recommended at add mesh sensitivity analysis.
6. What was the critical speed of the gear-rotor system?
7. What assumptions were used while defining the frictional heat generation of the meshing surface?
8. The authors observe that increase in the temperature results in decrease in the natural frequency. What is the logical explanation of this behavior?
9. It is recommended to add frequency response curves to identify the resonance regions.
10. Some of the references within the text are not properly defined e.g,
a. Line 289
b. Line 380
c. Line 390
d. Line 398
11. Graphics and illustrations are legible, however, if the resolution could be improved this would be desirable since there are some graphs where the numbers of the scales are a little blurry, besides that, there are a few improvements that can be made about the formatting of the graphs.
Author Response
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Author Response File: Author Response.docx
Reviewer 4 Report
in this research, considering the influence of temperature field on the natural frequency of gear- 12 rotor system, the difference between the natural frequency and the excitation frequency (meshing 13 frequency of gears) of the gear-rotor system is taken as the performance function. PC-Kriging and 14 adaptive design of experimental strategies is applied to the parametric model of Thermal-structural 15 coupling, and the resonance reliability and sensitivity of the gear-rotor system are analyzed. For 16 complex mechanical mechanisms, PC-Kriging has better accuracy than other surrogate models in 17 reliability analysis. The method proposed greatly saves the time of finite element simulation. The 18 results show that the natural frequency of gear rotor decreases with the increase of temperature, 19 and the natural frequency of different order varies with the change of temperature. The influence of 20 the sensitivity of different random parameters on the resonance reliability of gear rotor system is 21 obtained. The research on resonance failure of gear-rotor system under variable temperature field 22 provides theoretical basis and engineering application reference. The aim of the analysis should be evidenced in the abstract and introduction sections. The methodology should be further explained. Finally, the manuscript should be English proofread because some sentences are not clear.
Author Response
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Author Response File: Author Response.docx
Round 2
Reviewer 1 Report
All my concerns have been addressed, the manuscript is ready to be published.
Reviewer 3 Report
Authors have responded to my queries comprehensively and manuscript has been significantly improved. Thus, I am recommending publishing the article in its current form.
Reviewer 4 Report
The paper has been improved. Now the manuscript can be accepted for publication.
