Proton Persona terlalu keras, Bomba susah potong 
Aug 23 2016, 10:45 PM
QUOTE(tidus2k @ Aug 23 2016, 07:52 AM)
1. One of the main contributor for good crash result is the weight. Bezza is 930kg max while iriz 1180kg max. In frontal odb test, the kinetic energy come from the car itself. Crash engineer rule of thumb, 100kg reduction leads to 10% less intrusion @ firewall. Easier to get good result.
2. Engine package. The smaller the size (not cc), the better the crash result. Bezza has good engine package.
3. Crash is stochastic event, very difficult to get consistent result especially @ lower leg area. Let say you can get max 16 points in one test, you can get as low as 15.4 points in another test. So if iriz 14.07, most probably due to it is at the lowest limit (engineer task is to ensure that in the worst variation, it can still achieve the target)
4. Crash result depends on dummy calibration. For each area, head, neck, chest, femur, tibia etc there's a corridor that the dummy need to comply. let say chest deflection, you can have variations up to 6mm between dummy to another dummy. If in the test, you get dummy calibrated at the lower corridor, then you're lucky.
How do I know this? I used to worked as crash simulation engineer for audi.
For you to compare iriz and bezza result is unfair due to huge weight difference, this has been explained in NCAP FAQ. In high speed collision between both car, bezza has less chance to survive. Bezza has max 590MPa steel, iriz has countless 590MPa, a few 780,980,1180MPa parts with a couple of 1470MPa grade of hot formed steel
good info. thanks for sharing.2. Engine package. The smaller the size (not cc), the better the crash result. Bezza has good engine package.
3. Crash is stochastic event, very difficult to get consistent result especially @ lower leg area. Let say you can get max 16 points in one test, you can get as low as 15.4 points in another test. So if iriz 14.07, most probably due to it is at the lowest limit (engineer task is to ensure that in the worst variation, it can still achieve the target)
4. Crash result depends on dummy calibration. For each area, head, neck, chest, femur, tibia etc there's a corridor that the dummy need to comply. let say chest deflection, you can have variations up to 6mm between dummy to another dummy. If in the test, you get dummy calibrated at the lower corridor, then you're lucky.
How do I know this? I used to worked as crash simulation engineer for audi.
For you to compare iriz and bezza result is unfair due to huge weight difference, this has been explained in NCAP FAQ. In high speed collision between both car, bezza has less chance to survive. Bezza has max 590MPa steel, iriz has countless 590MPa, a few 780,980,1180MPa parts with a couple of 1470MPa grade of hot formed steel
Quote
0.0213sec
0.59
7 queries
GZIP Disabled