【正文】 nt towards the location horizontally . This distance varies with speed, must pay attention to guaranteeing the proper transition is designed when No. link with other structures thing in side guardrails 。s own situation not destroyed , absorb the energy of colliding partly, and channel the automobile into the runway , guarantee the automobile does not cross the guardrail and rushes into the relative lane or puts the bank protection rollingly . So the requisition for guardrail is: Must have enough intensity and proper rigidity , there should the stronger one that can suck the characteristic and certain direction ability at the same time. Obviously, it is different that systematic security with colliding to the automobile the semirigid guardrail of study on security that the automobile collides is studied, in automobile collide security research results that make can is it guide semirigid design of guardrail to use for directly either in studying 。s own the automobile and semirigid guardrail and contact and friction each other even more. In a word , have not considered any coupling dynamics phenomenon . Obviously, the essence that the designing technique of semirigid guardrail received like this can not reflect the question , result its unfavorable to special, great malignant traffic accident prevent and cure improvement of petence. We think , two inalienable ponents in the system that the automobile and semirigid guardrail collide in the automobile bumps into this incident of semirigid guardrail , the mutual coupling of two , influencing each other , form an organic whole together. While the automobile bumps into the semirigid guardrail , the automobile will keep in touch with the semirigid guardrails , and position and area of contact that are exposed to will change with sport of the automobile , the contact area changed will produce the contact strength and frictional force changed changed , under acting on monly in contact strength and frictional force changed of changing, semirigid guardrail and automobile car body structure will take place size and whom position change heavy and out of shape (this kind is big and out of shape and often closely related to the emergency rate effect of the material and inertia effect), This kind heavy to can cause new contact while being out of shape (including automobile car body structure and semirigid guardrail are one39。s safe automobile ideal sport law in the car in the course to collide . This research and past research are different. Collision security of automobile study for a large number of research results, author go on a large number of automobile collide security study too in the past, but the one that study is all that the automobile stipulating bumps into this kind of special operating mode of rigidity wall in safety standards of automobiles, purpose that study to judge mechanics , automobile of structure characteristic suitable and how improve the automobile structural design, the automobile set up collides though the model is very plicated, but that serves for the mechanics characteristic of confirming the automobile structure, it is unnecessary too to consider target39。s own great phenomena out of shape of ball plasticity of automobile in the model, and also consider the semirigid guardrail and automobile one39。s unit eight four form , use shell unit simulation of the part that may be contacted with the semirigid guardrail on the automobile, other parts adopt entity39。t give full play to the highspeed advantage that transport safely . Practice indicates , the semirigid guardrail is a kind of guardrail form with very good performance , already used widely worldwide, because new mechanism semirigid to protect design of fence new technology can make semirigid highspeed collision safe performance of guardrail improve further on the basis of semirigid guardrail anticollision, exceed to vehicle outlet prevention and cure of the traffic accident (accident this kind of the main reason that cause special , great malignant traffic accident ) have important meanings, therefore have wide application prospects . Study on new mechanism of the anticollision of semirigid guardrail to guarantee highway munication transportation system realize at a high speed transporting basic research of purpose one of safely, it is a subject for research of crossing in fields multidisciplinarily, the value of academic research with importance and prospect of using. It break through professional restriction that divide in the past, collide the system as a big system of coupling automobile semirigid guardrail, proceed from the angle of guaranteeing the safe level is optimum that the passenger collides in the car , study and collide the ideal sport law which the automobile should possess in the course, On this basis, through set up automobile semirigid guardrail collide systematic coupling dynamics artificial model is it study guardrail anticollision new mechanism to e, improve the precondition of designing petence of semirigid guardrail to the great breakthrough of the designing technique of traditional guardrail , have important meanings to the prevention and cure of the special , great malignant accident in the traffic accident of the road, so, should launch the study on it , the improvement of petence in order to guarantee road traffic39。s new image of munications and transportation to establish the technological foundation in a more costeffective manner . The rigidity guardrails and semirigid guardrails are the important safety devices on the expressway . Studies have shown rigidity guardrail though out of shape basically in colliding in accident, but because one39。s evacuating safely and staff members and equipment security. When the train blocks the trouble, can maintain passenger3