Chapter 25 Car body 同©大学 TONGII UNIVERSTTY Requirements for body shell >Body shell must have sufficient and reasonable strength,static and dynamic stiffness and passive safety. >Insufficient stiffness will cause relative deformation of mounting parts such as door frame and power train.Also,it will make relative assembly fail to work properly. >Unreasonable active stiffness will lead to resonance and noise which will shorten the fatigue life of body structure. >Passive safety is the main guarantee that meets or surpasses the requirements of relative laws and regulations.Chapter 25 Car body Requirements for body shell Body shell must have sufficient and reasonable strength, static and dynamic stiffness and passive safety. Insufficient stiffness will cause relative deformation of mounting parts such as door frame and power train. Also, it will make relative assembly fail to work properly. Unreasonable active stiffness will lead to resonance and noise which will shorten the fatigue life of body structure. Passive safety is the main guarantee that meets or surpasses the requirements of relative laws and regulations