Mechanical model of the wheat and analysis of stem lodging

By using multi-freedom systems vibration theory, the mechanical model of wheat lodging resistance is established under the wind of wheat. On the base of this model, Wheat is regarded as a plastic material, combined with the third strength theory, the stress of section can be calculated, the result is that the considerable stress of middle of the section IV is the largest, So this cross-section is prone to lodging, The results are consistent with actual observations, which verifies the validity and rationality of this model.