Modern car body mainly adopts the design of load-bearing body. The body is almost loaded with bears in the use of the car, including torsion, bending, vibration and collision, etc. The main idea of automobile help electric is that the body must have enough stiffness and strength to ensure the use and dynamic performance requirements of the vehicle.

　　扭轉(zhuǎn)剛度是汽車(chē)最重要的性能指標(biāo)之一。合理的扭轉(zhuǎn)剛度設(shè)計(jì)可以避免車(chē)身在多種工況下的可靠性、耐久性、振動(dòng)、噪聲等相關(guān)問(wèn)題，使整車(chē)綜合性能指標(biāo)得到提高。

　　Torsional stiffness is one of the most important performance indicators of automobiles. Reasonable torsional stiffness design can avoid the reliability, durability, vibration, noise and other related problems of the body under various working conditions, and improve the comprehensive performance index of the vehicle.

　　實(shí)際上，機(jī)體的失效主要是由扭轉(zhuǎn)疲勞引起的。當(dāng)扭轉(zhuǎn)剛度不足時(shí)，機(jī)體在外力作用下會(huì)產(chǎn)生較大的扭轉(zhuǎn)變形。反復(fù)疲勞負(fù)荷局部弱項(xiàng)，就像折斷筷子一樣。

　　In fact, the failure of the body is mainly caused by torsional fatigue. When the torsional stiffness is insufficient, the body will produce large torsional deformation under the action of external forces. The local weakness of repeated fatigue load is like breaking chopsticks.

　　什么原因?qū)е萝?chē)身變形

　　What Causes the Body Deformation

　　什么樣的車(chē)身能達(dá)到更高的扭轉(zhuǎn)剛度?路尊汽車(chē)電動(dòng)助力大師說(shuō)，其實(shí)，除了使用高強(qiáng)度材料外，結(jié)構(gòu)設(shè)計(jì)尤為關(guān)鍵。例如，當(dāng)電動(dòng)汽車(chē)的離體電池處于沒(méi)有縱梁的區(qū)域時(shí)(即在電池區(qū)域的中央通道被切斷)，它的縱梁會(huì)比傳統(tǒng)燃料汽車(chē)的弱，電池區(qū)域會(huì)整體變軟。

　　What kind of body can achieve higher torsional stiffness? Lu Zun automobile electric power assistant master said, in fact, in addition to the use of high-strength materials, structural design is particularly critical. For example, when the isolated battery of an electric vehicle is in the area without longitudinal beam (that is, the central channel of the battery area is cut off), its longitudinal beam will be weaker than that of a conventional fuel vehicle, and the battery area will become weaker as a whole.

　　關(guān)于扭轉(zhuǎn)剛度的重要性，我們知道純電動(dòng)汽車(chē)非常重視輕量化系數(shù)，這是通過(guò)綜合車(chē)身尺寸、質(zhì)量和性能的性能數(shù)據(jù)得到的。輕量化系數(shù)越小，單位能量吸收指數(shù)的重量成本越低。在這個(gè)公式中，除了車(chē)輛的重量和車(chē)身尺寸外，唯一的“強(qiáng)度”指標(biāo)是扭轉(zhuǎn)剛度。

　　Regarding the importance of torsional stiffness, we know that pure electric vehicles attach great importance to lightweight coefficient, which is obtained by synthesizing the performance data of body size, quality and performance. The smaller the lightweight coefficient is, the lower the weight cost per unit energy absorption index is. In this formula, except for the weight of the vehicle and the size of the body, the only "strength" index is the torsional stiffness.