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Abstract The interaction between the risk of enterprises due to the uncertainty of external environment and the complexity of R&D network's structure results in the occurrence of cascading failure. The paper cites the weighted scalefree network model to generate a R&D network according to the characteristics of R&D network firstly. Then the paper establishes the R&D network cascading failure model from the definition of initial load, the load redistribution of the broken nodes and the definition of capacity. Finally, the paper uses the numerical simulation methods to reveal cascading failures mechanism. Simulation results show that the cascading failures scale of R&D network is stable invariability with the increase of tolerance parameter. When cascading failures scale obtains the critical value, it decreases linearly and eventually become stable. And the critical value is the key risk threshold. Each tunable parameter has the unique key risk threshold which has negative correlation with the tunable parameter. The cascading failures scale of R&D network has positive correlation with the tunable parameter and decreases with the increase of the weight. The average degree has no relationship with cascading failures scale of R&D network.
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| Fund:国家自然科学基金项目（71471146）；国家自然科学基金青年项目（71501158）；西北工业大学研究生创意创新种子基金项目（Z2016038） |
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