Review Reports - Study on Influence of Multi-Parameter Variation of Bladed Disk System on Vibration Characteristics

Round 1

Reviewer 1 Report

Authors studied multi-parameter vibration effects of bladed disk system. Therefore, authors used finite model simulation and measurement data to be compared. Authors showed effective methods to recognize the vibration effects in the low frequency ranges. It could be useful to reduce the fatigue damages of some old blades. Authors compared the various simulation and algorithms of the vibration methods in the literature and showed some reasons why the proposed method could be effective for multi-parameter analysis. The simulated frequency and modal data could be effective because authors showed at least more than 10 samples.Therefore, the manuscript could be published with some minor suggestions as below.
However, there are some grammar mistakes so it is better to ask your colleague faculty to check the English grammar in entire manuscript.

1. Some labels inside Figures 10-13 too small. If they are not important, please disregard my comments.
2. Authors need to use abbreviated journal names.
3. Please correct N -order to N-order.
4. Please define T and k in Equation (1).
5. Please add the reference of (These are Hermite matrices) in Line 128.
6. In Lines 188 and 189, please correct 500mm and 14mm to 500 mm and 14 mm.
7. Please add the empty space of densityρin Line 209.
8. Please put the Figure in the center (Figure 2).
9. Please put arrow of the highest values in Figure 6.
10. Please express the highest frequency in each modal order in Figure 8.
11. Please improve Figure 9 quality.
12. In Conclusion section, please summarize the important simulated measured results to be emphasized.

Author Response

Dear Editors and Reviewers,

Thank you for your letter and for the comments concerning our manuscript entitled " Study on Influence of Multi-Parameter Variation of Bladed Disk System on Vibration Characteristics (applsci-1159830). Those comments are all valuable and very helpful for revising and improving our paper, as well as the important guiding significance to our research. We have studied comments carefully and have made the correction, which we hope to meet with approval. Revised portions are using the "Track Changes" function and marking in yellow color in the paper. The main corrections in the paper and the responds to the comments are listed as follows.

Reviewer 1

(1) Comment: There are some grammar mistakes so it is better to ask your colleague faculty to check the English grammar in entire manuscript.

Response: We accept the reviewer’s suggestion, we have checked the whole manuscript carefully and improved the quality of written English.The details have been marked in the revised manuscript using the "Track Change" function and marking in yellow color.

(2) Comment: Some labels inside Figures 10-13 too small. If they are not important, please disregard my comments.

Response: We accept the reviewer’s suggestion, in order to clearly display the labels in the Figures 10-13, we enlarge the picture and rearrange it.

(3) Comment: Authors need to use abbreviated journal names.

Response: We accept the reviewer’s suggestion, we recheck the journal author names and revise the author names that appear in lines 37–83 and mark yellow color in the article.

(4) Comment: Please correct N -order to N-order.

Response: We accept the reviewer’s suggestion, We changed N -order to N-order in lines 103 to 105.

(5) Comment: Please define T and k in Equation (1).

Response: We accept the reviewer’s suggestion, we defined T and k in line 115 in the article. T is the transfer matrix and k=1,…,N is the number of blades, and N is the total number of blades.

(6) Comment: Please add the reference of (These are Hermite matrices) in Line 128. overweight and hard to understand.

Response: We accept the reviewer’s suggestion, we annotated the Hermite matrices in line 130, Hermite matrices in the article refer to equations (5) and (6).

(7) Comment: In Lines 188 and 189, please correct 500mm and 14mm to 500 mm and 14 mm.

Response: We accept the reviewer’s suggestion, we correct 500mm and 14mm to 500mm and 14mm in line 191 and 120. And carefully check the whole article, corrected the similarity problem.

(8) Comment: Please add the empty space of densityρin Line 209.

Response: We accept the reviewer’s suggestion, we added the empty space of densityρin Line 213.

(9) Comment: Please put the Figure in the center (Figure 2).

Response: We accept the reviewer’s suggestion, we have put the Figure 2 in the center in Line 218.

(10) Comment: Please put arrow of the highest values in Figure 6.

Response: We accept the reviewer’s suggestion, we have put arrow of the highest values in Figure 6

Figure 6. Order times mode frequency of bladed disk system

(11) Comment: Please express the highest frequency in each modal order in Figure 8.

Response: We accept the reviewer’s suggestion, we modified the size of the figure to make the labels in the figure more obvious, and the highest frequency in each order is shown clearer in Figure 8.

(12) Comment: Please improve Figure 9 quality.

Response: We accept the reviewer’s suggestion, we modified the size of the figure, and the quality of Figure 9 was improved.

(13) Comment: In Conclusion section, please summarize the important simulated measured results to be emphasized.

Response: We accept the reviewer’s suggestion, we modified the conclusion section according to the simulated measurement results, and modified the position in lines 588 to 622 of the article and marked in yellow color.

Reviewer 2

Comment: High pressure turbines and high-speed ones are on the verge of several changes, and the enable aspect is manufacturing: behaviours changes depending on elasticity or roughness. The most revolutionary ways can be patents like US 8039773 B2. Europe and Canada are leading the change, your is interesting and it is in the wake of that. Check spelling: “Jourinal” this is easily solved by word or text editors.Liao is well addressed by you, that is OK. However some of them seems modifications till reach the final work, with all the real knowledge.Figure 13….I do not see the real contribution, perhaps a table of frequencies is better. The use of FEM as itself is not a contribution, you must take care of details: the work frame (poor ,see the ideas about the state of the art), too many figures of modes….the size is small and 35% are in excess, please reduce. Conclusion: The vibration mode trend of the blade-disk system is basically consistent with that of the roulette wheel. With the increase of blade mass, the modal frequency of the whole bladedisk system gradually decreases, and the amplitude will increase slightly. Several things: ”roulette” is a bad term, the conclusion is too obvious. Figure 4: this seesm form a computer fan, the world of turbines is much developed. REDUCE WORK BY 20% FEM analysis can be main concern in IBR and in some applications, yours is in the line interesting. You id not approach the state of the art, because a reader will not know what is the frame of the work. Authors must look for them, https://doi.org/10.1007/s00170-016-9435-1 in which roughness is considered a key aspect in fluxes on blades, as usually Pratt & Whitney considered in aeroengines as well., or for instance International Journal of Mechatronics and Manufacturing Systems 9(4),385-401.Or http://dx.doi.org/10.1080/00207543.2014.983619 . Do you think Waspalloy can be a solution in the design? Some authors are considering this aspect, because IN718 is reaching the limit, for instace GKN DOI10.1007/s00170-010-2590-x or https://doi.org/10.1016/j.jmapro.2017.01.012,or https://doi.org/10.1080/10426914.2016.1244838. I see Taylor and Francis was not checked by you. Neither the journal Proc of Ins mech eng part B, the British are making big steps ahead here as well.

Response: We accept the reviewer’s suggestion, through the URLs and articles you provide, we read the articles Flank milling model for tool path programming of turbine blisks and compressors; Solid subtraction model for the surface topography prediction in flank milling of thin-walled integral blade rotors (IBRs); Tool wear on nickel alloys with different coolant pressures, Comparison of Alloy 718 and Waspaloy; Effects of high-pressure cooling on the wear patterns on turning inserts used on alloy IN718. Through these articles we learned about a methodology for complex surface machining based on cutting forces prediction and the implementation of a cutting force prediction model. Also known the effects of high-pressure cooling on the wear patterns on turning inserts used on alloy IN718. And as a reference introduction as a reference modified the position in lines 71 to 74 and 84 to 86。

The key content of this paper is to verify the reliability of finite element analysis by comparing the finite element calculation results with the experimental vibration mode, and providing help for the structural design and safety stability analysis of the bladed disk system. In the conclusions, we modified the conclusion section according to the simulated measurement results, and modified the position in lines 588 to 622 of the article and marked in yellow color. We have enlarged the size of Figure 13 to see more intuitively that after part of the blade of the bladed disk system is missing, the modal shape is generally consistent with the change trend of the initial state. We carefully check and correct the spelling and format problems in the article, the details have been marked in the revised manuscript using the "Track Change" function and marking in yellow color。

Finally, we appreciate for Editors/Reviewers' warm work earnestly, and hope that the correction will meet with approval. Once again, thank you very much for your comments and suggestions.

Best regards,

Tian Yu Zhao

Phone: +8613940049202

Email: zhaotianyu@mail.neu.edu.cn

Author Response File: Author Response.docx

Reviewer 2 Report

Please I kindly ask you to follow all the suggestions, In current version paper is not acceptable

Comments for author File: Comments.pdf