车体动态应力分析方法研究

Research on the Vehicle Dynamic Stress Analysis Methods

针对某型装甲车辆车体进行了不同等级路面下车辆行驶时的动态应力分析,讨论了所使用的两种方法:惯性释放法和模态应力恢复法。并将两种方法应用到车体的动态应力分析中,得出了各自的结果。通过两种方法的结果对比,得出在进行车体动态应力分析时,应注意路面激励对车体造成的影响,当激励频率与结构固有频率之间差距较小时,应当采用模态应力恢复法以获得准确的车体动态应力结果;当激励频率与结构固有频率之间差距较大时,在保证计算精度的前提下,可以采用惯性释放方法来提高计算的效率。

We take a certain armored vehicle to study the roads of different levels. We introduced and discussed modal stress recovery method. Both methods have been dynamic stress of the vehicle hull when it is driving on two methods used in this paper： inertia relief method and used in the dynamic stress analysis of the vehicle hull, with two kinds of results presented. Through the comparison of the results, we can conclude that when we do research on the vehicle dynamic stress, different methods are applied according to the road excitation. Modal stress recovery method should be used when road excitation frequency is close to the inherent frequency of the structure, while inertia relief method should be used when there is big difference between them.