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Aiming at the problem of parameter design of marine wedge gear propeller shaft clutches, the design and research of marine wedge gear propeller shaft clutches are carried out. The variation of the critical friction coefficient required for the self-locking of the marine wedge gear propeller shaft clutch with the pressure angle and wedge angle of the wedge gear is theoretically analyzed and verified by the simulation. The multi-body dynamic model of marine wedge gear propeller shaft clutches is established, and the engagement process with the tooth error is studied. The results show that the marine wedge gear propeller shaft clutch reduces the accuracy requirement of the tooth alignment process. When there is an error within 0.4° in the engagement process, the engagement can be completed under its own guidance. The formula of self-locking critical friction coefficient derived in this study can be used to guide the design of marine wedge gear propeller shaft clutches.

Introduction: Studies focusing on coopetition and dynamic capabilities have expanded significantly over the past several decades. Coopetition strategy and dynamic capabilities are increasingly recognised as sources of sustained competitive advantage. The purpose of this paper is to provide a better understanding of the factors driving growth performance in digital healthcare ventures by examining the role of coopetition, exploration and exploitation capabilities, and environmental uncertainty. While numerous studies have examined the competitive advantage of coopetition, its specific contribution to the growth of ventures in the digital realm remains less explored. Clarifying the strategic role of coopetition in driving growth performance is critical for delineating the intricate relationship between coopetition and growth performance, particularly in the context of digital healthcare ventures. To fill in this research gap, this study uses coopetition theory and dynamic capabilities theory to look at how exploration and exploitation capabilities, as well as environmental uncertainty, affect the relationship between coopetition and growth performance in digital healthcare ventures., Methods: We collected a total of 338 questionnaires from Chinese digital healthcare ventures between March 2023 and August 2023. We conducted data analysis using SPSS 26.0 and its macro-program PROCESS., Results: Our results confirm that coopetition has a positive effect on growth performance in digital healthcare ventures. Furthermore, exploration and exploitation capabilities fully mediate the relationship between coopetition and growth performance. Moreover, environmental uncertainty significantly and distinctively moderates the impact of exploration and exploitation capabilities on growth performance., Discussion: This study contributes to the existing literature by providing deeper insight into the relationship between coopetition and growth performance in digital healthcare ventures. It also offers important practical implications for public health improvement and socio-economic development., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2024 Liu, Bai, Leng, Yao, Yang, Li and Yin.)