为了保证结构体的安全性,希望具有最适宜的安全系数以确保结构的可靠性。随着新材料的采用、机构的复杂化、以及同一机种在不同环境下使用等等日益复杂的利用条件下,应用经验数据简单决定安全系数的传统方法已很难适应。因此在各种不同情况下,既要充分地确保安全性、又要在设计中对经济方面加以考虑,就要合理地研究安全系数。 In order to ensure the safety of the structure, it is desirable to have the most appropriate safety factor to ensure the structural reliability. With the introduction of new materials, the complexity of institutions, and the increasingly complex use of the same machine in different environments, the traditional method of simply using the empirical data to determine the safety factor has been difficult to adapt. Therefore, under different circumstances, it is necessary to fully ensure the safety, but also in the design of the economic aspects to be considered, it is necessary to study the safety factor.