随着我国工业生产的迅速发展,生产中的危险因素也在增多。但是,对一个生产系统如何进行安全评价,至今没有一个统一的标准。国外有人把事故定义为:事故是不希望的能量转移与释放。如机械能造成的机械伤害,热能造成的烧烫伤,等等。这种不希望的转移与释放的能量的大小,直接关系到所造成事故的严重程度。因此,也可以说,安全工作就是控制能量的这种转移与释放。如果把“安全程度”(简称“安全度”)用符号An表示,其意义为:能导致事故发生的能量的倒数值,单位为J~(-1)。把人体在 With the rapid development of China’s industrial production, the risk factors in production are also increasing. However, there is no single standard for how to evaluate the safety of a production system. Someone abroad defines the accident as: accident is an undesirable energy transfer and release. Such as mechanical damage caused by mechanical energy, heat burns, and so on. The magnitude of this unwanted transfer and release of energy is directly related to the severity of the accident caused. Therefore, it can also be said that safety work is to control the transfer and release of energy. If the “degree of safety” (referred to as “safety”) with the symbol An said, the meaning is: can cause the incident of the reciprocal value of energy, in units of J ~ (-1). The human body in