Finite element analysis for constraint model was conducted on the gear boxcasing of 7ypj agricultural tricar using modal analytic theory according to its structural characteristics.
针对7ypj型农用三轮汽车齿轮箱体的结构特点，应用模态分析理论对其进行了约束模态的有限元分析。
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Now we know why the packing box was so large: the Adamo is encased in a "time-capsule" plastic casing, which in turn is protected during shipping via black plastic shipping caps.